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#1 2020-05-16 13:55:11

HaughtyGrayAlien
Member
Registered: 2020-05-16
Posts: 7

[SOLVED] Tracking down i915 seg fault

Wondering if anyone could help give me a steer on this...

For context, I am not a Linux newbie, but I'm no expert either.

I am using a laptop with integrated Intel graphics. On that laptop I have installed Windows 10, Linux Mint and (obviously) Arch. Arch is where I am having an issue.

I have an application (with Linux and Windows versions) that is triggering a seg fault on Arch when I do certian things within it. The same thing does not happen on Windows and Linux Mint. Windows is irrelevant, but I am trying to work out why - specifically - it works on Mint and not Arch.

I have spoken to the developer, who tells me that the logs show it to be some kind of "UI crash". Because the developer cannot reproduce it, they cannot diagnose it. That said, they very strongly suspect that it is related to my graphics drivers.

My understanding is that the graphics driver is a kernel module (i915). I have tried the LTS kernel, and the zen kernel. Neither made any difference to the issue. I notice that Mint is using a much older kernel... maybe the developer has just writen it for that older kernel and has (not yet) had to update it for the newer kernel... would that make sense?

How can I diagnose this? What can I try? (if anything)

Info below. Happy to provide more. Greatly appreciate any pointers.

Arch
lwhw -c video

  *-display                 
       description: VGA compatible controller
       product: Iris Plus Graphics G7
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       logical name: /dev/fb0
       version: 07
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=i915 latency=0 mode=1920x1080 visual=truecolor xres=1920 yres=1080
       resources: iomemory:600-5ff iomemory:400-3ff irq:166 memory:603c000000-603cffffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff

modinfo i915

filename:       /lib/modules/5.4.41-1-lts/kernel/drivers/gpu/drm/i915/i915.ko.xz
license:        GPL and additional rights
description:    Intel Graphics
author:         Intel Corporation
author:         Tungsten Graphics, Inc.
firmware:       i915/bxt_dmc_ver1_07.bin
firmware:       i915/skl_dmc_ver1_27.bin
firmware:       i915/kbl_dmc_ver1_04.bin
firmware:       i915/glk_dmc_ver1_04.bin
firmware:       i915/cnl_dmc_ver1_07.bin
firmware:       i915/icl_dmc_ver1_07.bin
firmware:       i915/tgl_dmc_ver2_04.bin
firmware:       i915/skl_huc_ver01_07_1398.bin
firmware:       i915/skl_guc_33.0.0.bin
firmware:       i915/bxt_huc_ver01_8_2893.bin
firmware:       i915/bxt_guc_33.0.0.bin
firmware:       i915/kbl_huc_ver02_00_1810.bin
firmware:       i915/kbl_guc_33.0.0.bin
firmware:       i915/glk_huc_ver03_01_2893.bin
firmware:       i915/glk_guc_33.0.0.bin
firmware:       i915/kbl_huc_ver02_00_1810.bin
firmware:       i915/kbl_guc_33.0.0.bin
firmware:       i915/icl_huc_ver8_4_3238.bin
firmware:       i915/icl_guc_33.0.0.bin
srcversion:     DC83AAAB252C77F807A8542
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alias:          pci:v00008086d00003EA1sv*sd*bc03sc*i*
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alias:          pci:v00008086d00003EA7sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA6sv*sd*bc03sc*i*
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alias:          pci:v00008086d00005A85sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A84sv*sd*bc03sc*i*
alias:          pci:v00008086d00001A85sv*sd*bc03sc*i*
alias:          pci:v00008086d00001A84sv*sd*bc03sc*i*
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alias:          pci:v00008086d0000192Asv*sd*bc03sc*i*
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alias:          pci:v00008086d00001923sv*sd*bc03sc*i*
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alias:          pci:v00008086d00001921sv*sd*bc03sc*i*
alias:          pci:v00008086d00001916sv*sd*bc03sc*i*
alias:          pci:v00008086d0000190Asv*sd*bc03sc*i*
alias:          pci:v00008086d0000190Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001902sv*sd*bc03sc*i*
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alias:          pci:v00008086d00001602sv*sd*bc03sc*i*
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alias:          pci:v00008086d0000160Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001606sv*sd*bc03sc*i*
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alias:          pci:v00008086d00000F33sv*sd*bc03sc*i*
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alias:          pci:v00008086d00000D26sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C26sv*sd*bc03sc*i*
alias:          pci:v00008086d00000D2Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000D2Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000D2Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000D22sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C2Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000C2Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000C2Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000C22sv*sd*bc03sc*i*
alias:          pci:v00008086d0000042Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000042Bsv*sd*bc03sc*i*
alias:          pci:v00008086d0000042Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000422sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A2Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000A26sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A2Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000A2Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000A22sv*sd*bc03sc*i*
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alias:          pci:v00008086d00000C16sv*sd*bc03sc*i*
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alias:          pci:v00008086d00000416sv*sd*bc03sc*i*
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alias:          pci:v00008086d00002A02sv*sd*bc03sc*i*
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alias:          pci:v00008086d000029B2sv*sd*bc03sc*i*
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alias:          pci:v00008086d000027A2sv*sd*bc03sc*i*
alias:          pci:v00008086d00002772sv*sd*bc03sc*i*
alias:          pci:v00008086d00002592sv*sd*bc03sc*i*
alias:          pci:v00008086d0000258Asv*sd*bc03sc*i*
alias:          pci:v00008086d00002582sv*sd*bc03sc*i*
alias:          pci:v00008086d00002572sv*sd*bc03sc*i*
alias:          pci:v00008086d0000358Esv*sd*bc03sc*i*
alias:          pci:v00008086d00003582sv*sd*bc03sc*i*
alias:          pci:v00008086d00002562sv*sd*bc03sc*i*
alias:          pci:v00008086d00003577sv*sd*bc03sc*i*
depends:        drm_kms_helper,drm,intel-gtt,i2c-algo-bit
retpoline:      Y
intree:         Y
name:           i915
vermagic:       5.4.41-1-lts SMP mod_unload 
sig_id:         PKCS#7
signer:         Build time autogenerated kernel key
sig_key:        5D:2E:5B:26:92:B8:3C:FB:2A:BE:97:A9:A0:5B:51:1D:C8:D8:9A:9E
sig_hashalgo:   sha512
signature:      15:4E:01:1D:72:B9:E8:1A:5A:C7:31:C6:84:3C:8A:8B:EA:34:72:A7:
		5C:A9:D1:AC:7A:38:6B:CA:CA:7E:F8:11:DB:1E:AF:A6:CE:7E:77:CA:
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		5C:95:F7:41:6A:B1:BE:24:76:20:D6:D8
parm:           modeset:Use kernel modesetting [KMS] (0=disable, 1=on, -1=force vga console preference [default]) (int)
parm:           enable_dc:Enable power-saving display C-states. (-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6) (int)
parm:           enable_fbc:Enable frame buffer compression for power savings (default: -1 (use per-chip default)) (int)
parm:           lvds_channel_mode:Specify LVDS channel mode (0=probe BIOS [default], 1=single-channel, 2=dual-channel) (int)
parm:           panel_use_ssc:Use Spread Spectrum Clock with panels [LVDS/eDP] (default: auto from VBT) (int)
parm:           vbt_sdvo_panel_type:Override/Ignore selection of SDVO panel mode in the VBT (-2=ignore, -1=auto [default], index in VBT BIOS table) (int)
parm:           reset:Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default]) (int)
parm:           vbt_firmware:Load VBT from specified file under /lib/firmware (charp)
parm:           error_capture:Record the GPU state following a hang. This information in /sys/class/drm/card<N>/error is vital for triaging and debugging hangs. (bool)
parm:           enable_hangcheck:Periodically check GPU activity for detecting hangs. WARNING: Disabling this can cause system wide hangs. (default: true) (bool)
parm:           enable_psr:Enable PSR (0=disabled, 1=enabled) Default: -1 (use per-chip default) (int)
parm:           force_probe:Force probe the driver for specified devices. See CONFIG_DRM_I915_FORCE_PROBE for details. (charp)
parm:           alpha_support:Deprecated. See i915.force_probe. (bool)
parm:           disable_power_well:Disable display power wells when possible (-1=auto [default], 0=power wells always on, 1=power wells disabled when possible) (int)
parm:           enable_ips:Enable IPS (default: true) (int)
parm:           fastboot:Try to skip unnecessary mode sets at boot time (0=disabled, 1=enabled) Default: -1 (use per-chip default) (int)
parm:           prefault_disable:Disable page prefaulting for pread/pwrite/reloc (default:false). For developers only. (bool)
parm:           load_detect_test:Force-enable the VGA load detect code for testing (default:false). For developers only. (bool)
parm:           force_reset_modeset_test:Force a modeset during gpu reset for testing (default:false). For developers only. (bool)
parm:           invert_brightness:Invert backlight brightness (-1 force normal, 0 machine defaults, 1 force inversion), please report PCI device ID, subsystem vendor and subsystem device ID to dri-devel@lists.freedesktop.org, if your machine needs it. It will then be included in an upcoming module version. (int)
parm:           disable_display:Disable display (default: false) (bool)
parm:           mmio_debug:Enable the MMIO debug code for the first N failures (default: off). This may negatively affect performance. (int)
parm:           verbose_state_checks:Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions. (bool)
parm:           nuclear_pageflip:Force enable atomic functionality on platforms that don't have full support yet. (bool)
parm:           edp_vswing:Ignore/Override vswing pre-emph table selection from VBT (0=use value from vbt [default], 1=low power swing(200mV),2=default swing(400mV)) (int)
parm:           enable_guc:Enable GuC load for GuC submission and/or HuC load. Required functionality can be selected using bitmask values. (-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load) (int)
parm:           guc_log_level:GuC firmware logging level. Requires GuC to be loaded. (-1=auto [default], 0=disable, 1..4=enable with verbosity min..max) (int)
parm:           guc_firmware_path:GuC firmware path to use instead of the default one (charp)
parm:           huc_firmware_path:HuC firmware path to use instead of the default one (charp)
parm:           dmc_firmware_path:DMC firmware path to use instead of the default one (charp)
parm:           enable_dp_mst:Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true) (bool)
parm:           enable_dpcd_backlight:Enable support for DPCD backlight control(-1=use per-VBT LFP backlight type setting, 0=disabled [default], 1=enabled) (int)
parm:           enable_gvt:Enable support for Intel GVT-g graphics virtualization host support(default:false) (bool)

Linux Mint
lwhw -c video

  *-display
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       logical name: /dev/fb0
       version: 07
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=i915 latency=0 mode=1920x1080 visual=truecolor xres=1920 yres=1080
       resources: iomemory:600-5ff iomemory:400-3ff irq:147 memory:603c000000-603cffffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff

modinfo i915

filename:       /lib/modules/5.3.0-51-generic/kernel/drivers/gpu/drm/i915/i915.ko
license:        GPL and additional rights
description:    Intel Graphics
author:         Intel Corporation
author:         Tungsten Graphics, Inc.
firmware:       i915/bxt_dmc_ver1_07.bin
firmware:       i915/skl_dmc_ver1_27.bin
firmware:       i915/kbl_dmc_ver1_04.bin
firmware:       i915/glk_dmc_ver1_04.bin
firmware:       i915/cnl_dmc_ver1_07.bin
firmware:       i915/icl_dmc_ver1_07.bin
firmware:       i915/icl_guc_32.0.3.bin
firmware:       i915/glk_guc_32.0.3.bin
firmware:       i915/kbl_guc_32.0.3.bin
firmware:       i915/bxt_guc_32.0.3.bin
firmware:       i915/skl_guc_32.0.3.bin
firmware:       i915/icl_huc_ver8_4_3238.bin
firmware:       i915/glk_huc_ver03_01_2893.bin
firmware:       i915/kbl_huc_ver02_00_1810.bin
firmware:       i915/bxt_huc_ver01_8_2893.bin
firmware:       i915/skl_huc_ver01_07_1398.bin
srcversion:     9D7CAED0F2CB2B583B17A68
alias:          pci:v00008086d00004541sv*sd*bc03sc*i*
alias:          pci:v00008086d00004551sv*sd*bc03sc*i*
alias:          pci:v00008086d00004571sv*sd*bc03sc*i*
alias:          pci:v00008086d00004500sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A5Dsv*sd*bc03sc*i*
alias:          pci:v00008086d00008A51sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A54sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A53sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A70sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A71sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A56sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A57sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A5Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00008A5Asv*sd*bc03sc*i*
alias:          pci:v00008086d00008A52sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A58sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A59sv*sd*bc03sc*i*
alias:          pci:v00008086d00008A5Csv*sd*bc03sc*i*
alias:          pci:v00008086d00008A50sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A40sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A50sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A4Asv*sd*bc03sc*i*
alias:          pci:v00008086d00005A42sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A5Asv*sd*bc03sc*i*
alias:          pci:v00008086d00005A52sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A49sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A41sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A59sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A51sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A4Csv*sd*bc03sc*i*
alias:          pci:v00008086d00005A44sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A5Csv*sd*bc03sc*i*
alias:          pci:v00008086d00005A54sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BF6sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BE6sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BC6sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BC2sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BC4sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BC8sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BC5sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BC0sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BCCsv*sd*bc03sc*i*
alias:          pci:v00008086d00009BCBsv*sd*bc03sc*i*
alias:          pci:v00008086d00009BCAsv*sd*bc03sc*i*
alias:          pci:v00008086d00009B41sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BA2sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BA4sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BA8sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BA5sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BA0sv*sd*bc03sc*i*
alias:          pci:v00008086d00009BACsv*sd*bc03sc*i*
alias:          pci:v00008086d00009BABsv*sd*bc03sc*i*
alias:          pci:v00008086d00009BAAsv*sd*bc03sc*i*
alias:          pci:v00008086d00009B21sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA2sv*sd*bc03sc*i*
alias:          pci:v00008086d000087CAsv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA3sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA0sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA4sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA1sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA8sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA7sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA6sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA5sv*sd*bc03sc*i*
alias:          pci:v00008086d00003EA9sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E94sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E9Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00003E9Csv*sd*bc03sc*i*
alias:          pci:v00008086d00003E9Asv*sd*bc03sc*i*
alias:          pci:v00008086d00003E98sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E96sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E92sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E91sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E99sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E93sv*sd*bc03sc*i*
alias:          pci:v00008086d00003E90sv*sd*bc03sc*i*
alias:          pci:v00008086d000087C0sv*sd*bc03sc*i*
alias:          pci:v00008086d0000591Csv*sd*bc03sc*i*
alias:          pci:v00008086d0000593Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00005927sv*sd*bc03sc*i*
alias:          pci:v00008086d00005923sv*sd*bc03sc*i*
alias:          pci:v00008086d00005926sv*sd*bc03sc*i*
alias:          pci:v00008086d0000591Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000591Asv*sd*bc03sc*i*
alias:          pci:v00008086d0000591Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00005912sv*sd*bc03sc*i*
alias:          pci:v00008086d00005917sv*sd*bc03sc*i*
alias:          pci:v00008086d0000591Esv*sd*bc03sc*i*
alias:          pci:v00008086d00005921sv*sd*bc03sc*i*
alias:          pci:v00008086d00005916sv*sd*bc03sc*i*
alias:          pci:v00008086d0000590Asv*sd*bc03sc*i*
alias:          pci:v00008086d0000590Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00005908sv*sd*bc03sc*i*
alias:          pci:v00008086d00005902sv*sd*bc03sc*i*
alias:          pci:v00008086d00005915sv*sd*bc03sc*i*
alias:          pci:v00008086d0000590Esv*sd*bc03sc*i*
alias:          pci:v00008086d00005913sv*sd*bc03sc*i*
alias:          pci:v00008086d00005906sv*sd*bc03sc*i*
alias:          pci:v00008086d00003185sv*sd*bc03sc*i*
alias:          pci:v00008086d00003184sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A85sv*sd*bc03sc*i*
alias:          pci:v00008086d00005A84sv*sd*bc03sc*i*
alias:          pci:v00008086d00001A85sv*sd*bc03sc*i*
alias:          pci:v00008086d00001A84sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A84sv*sd*bc03sc*i*
alias:          pci:v00008086d0000193Asv*sd*bc03sc*i*
alias:          pci:v00008086d0000192Asv*sd*bc03sc*i*
alias:          pci:v00008086d0000193Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000193Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001932sv*sd*bc03sc*i*
alias:          pci:v00008086d0000192Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000192Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001927sv*sd*bc03sc*i*
alias:          pci:v00008086d00001923sv*sd*bc03sc*i*
alias:          pci:v00008086d00001926sv*sd*bc03sc*i*
alias:          pci:v00008086d0000191Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000191Asv*sd*bc03sc*i*
alias:          pci:v00008086d0000191Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001912sv*sd*bc03sc*i*
alias:          pci:v00008086d0000191Esv*sd*bc03sc*i*
alias:          pci:v00008086d00001921sv*sd*bc03sc*i*
alias:          pci:v00008086d00001916sv*sd*bc03sc*i*
alias:          pci:v00008086d0000190Asv*sd*bc03sc*i*
alias:          pci:v00008086d0000190Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001902sv*sd*bc03sc*i*
alias:          pci:v00008086d0000190Esv*sd*bc03sc*i*
alias:          pci:v00008086d00001906sv*sd*bc03sc*i*
alias:          pci:v00008086d000022B3sv*sd*bc03sc*i*
alias:          pci:v00008086d000022B2sv*sd*bc03sc*i*
alias:          pci:v00008086d000022B1sv*sd*bc03sc*i*
alias:          pci:v00008086d000022B0sv*sd*bc03sc*i*
alias:          pci:v00008086d0000163Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000163Asv*sd*bc03sc*i*
alias:          pci:v00008086d00001632sv*sd*bc03sc*i*
alias:          pci:v00008086d0000163Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000163Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001636sv*sd*bc03sc*i*
alias:          pci:v00008086d0000162Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000162Asv*sd*bc03sc*i*
alias:          pci:v00008086d00001622sv*sd*bc03sc*i*
alias:          pci:v00008086d0000162Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000162Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001626sv*sd*bc03sc*i*
alias:          pci:v00008086d0000161Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000161Asv*sd*bc03sc*i*
alias:          pci:v00008086d00001612sv*sd*bc03sc*i*
alias:          pci:v00008086d0000161Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000161Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001616sv*sd*bc03sc*i*
alias:          pci:v00008086d0000160Dsv*sd*bc03sc*i*
alias:          pci:v00008086d0000160Asv*sd*bc03sc*i*
alias:          pci:v00008086d00001602sv*sd*bc03sc*i*
alias:          pci:v00008086d0000160Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000160Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00001606sv*sd*bc03sc*i*
alias:          pci:v00008086d00000155sv*sd*bc03sc*i*
alias:          pci:v00008086d00000157sv*sd*bc03sc*i*
alias:          pci:v00008086d00000F33sv*sd*bc03sc*i*
alias:          pci:v00008086d00000F32sv*sd*bc03sc*i*
alias:          pci:v00008086d00000F31sv*sd*bc03sc*i*
alias:          pci:v00008086d00000F30sv*sd*bc03sc*i*
alias:          pci:v00008086d00000D26sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C26sv*sd*bc03sc*i*
alias:          pci:v00008086d00000D2Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000D2Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000D2Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000D22sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C2Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000C2Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000C2Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000C22sv*sd*bc03sc*i*
alias:          pci:v00008086d0000042Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000042Bsv*sd*bc03sc*i*
alias:          pci:v00008086d0000042Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000422sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A2Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000A26sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A2Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000A2Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000A22sv*sd*bc03sc*i*
alias:          pci:v00008086d00000D16sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C16sv*sd*bc03sc*i*
alias:          pci:v00008086d00000426sv*sd*bc03sc*i*
alias:          pci:v00008086d00000416sv*sd*bc03sc*i*
alias:          pci:v00008086d00000D1Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000D1Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000D1Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000D12sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C1Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000C1Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000C1Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000C12sv*sd*bc03sc*i*
alias:          pci:v00008086d0000041Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000041Bsv*sd*bc03sc*i*
alias:          pci:v00008086d0000041Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000412sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A1Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000A16sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A1Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000A1Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000A12sv*sd*bc03sc*i*
alias:          pci:v00008086d00000D06sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C06sv*sd*bc03sc*i*
alias:          pci:v00008086d00000406sv*sd*bc03sc*i*
alias:          pci:v00008086d00000D0Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000D0Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000D0Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000D02sv*sd*bc03sc*i*
alias:          pci:v00008086d00000C0Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000C0Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000C0Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000C02sv*sd*bc03sc*i*
alias:          pci:v00008086d0000040Esv*sd*bc03sc*i*
alias:          pci:v00008086d0000040Bsv*sd*bc03sc*i*
alias:          pci:v00008086d0000040Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000402sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A0Esv*sd*bc03sc*i*
alias:          pci:v00008086d00000A06sv*sd*bc03sc*i*
alias:          pci:v00008086d00000A0Bsv*sd*bc03sc*i*
alias:          pci:v00008086d00000A0Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000A02sv*sd*bc03sc*i*
alias:          pci:v00008086d0000016Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000162sv*sd*bc03sc*i*
alias:          pci:v00008086d0000015Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000152sv*sd*bc03sc*i*
alias:          pci:v00008086d00000166sv*sd*bc03sc*i*
alias:          pci:v00008086d00000156sv*sd*bc03sc*i*
alias:          pci:v00008086d0000016Asv0000152Dsd00008990bc03sc*i*
alias:          pci:v00008086d00000126sv*sd*bc03sc*i*
alias:          pci:v00008086d00000116sv*sd*bc03sc*i*
alias:          pci:v00008086d00000106sv*sd*bc03sc*i*
alias:          pci:v00008086d00000122sv*sd*bc03sc*i*
alias:          pci:v00008086d00000112sv*sd*bc03sc*i*
alias:          pci:v00008086d0000010Asv*sd*bc03sc*i*
alias:          pci:v00008086d00000102sv*sd*bc03sc*i*
alias:          pci:v00008086d00000046sv*sd*bc03sc*i*
alias:          pci:v00008086d00000042sv*sd*bc03sc*i*
alias:          pci:v00008086d0000A011sv*sd*bc03sc*i*
alias:          pci:v00008086d0000A001sv*sd*bc03sc*i*
alias:          pci:v00008086d00002E92sv*sd*bc03sc*i*
alias:          pci:v00008086d00002E42sv*sd*bc03sc*i*
alias:          pci:v00008086d00002E32sv*sd*bc03sc*i*
alias:          pci:v00008086d00002E22sv*sd*bc03sc*i*
alias:          pci:v00008086d00002E12sv*sd*bc03sc*i*
alias:          pci:v00008086d00002E02sv*sd*bc03sc*i*
alias:          pci:v00008086d00002A42sv*sd*bc03sc*i*
alias:          pci:v00008086d00002A12sv*sd*bc03sc*i*
alias:          pci:v00008086d00002A02sv*sd*bc03sc*i*
alias:          pci:v00008086d000029D2sv*sd*bc03sc*i*
alias:          pci:v00008086d000029C2sv*sd*bc03sc*i*
alias:          pci:v00008086d000029B2sv*sd*bc03sc*i*
alias:          pci:v00008086d000029A2sv*sd*bc03sc*i*
alias:          pci:v00008086d00002992sv*sd*bc03sc*i*
alias:          pci:v00008086d00002982sv*sd*bc03sc*i*
alias:          pci:v00008086d00002972sv*sd*bc03sc*i*
alias:          pci:v00008086d000027AEsv*sd*bc03sc*i*
alias:          pci:v00008086d000027A2sv*sd*bc03sc*i*
alias:          pci:v00008086d00002772sv*sd*bc03sc*i*
alias:          pci:v00008086d00002592sv*sd*bc03sc*i*
alias:          pci:v00008086d0000258Asv*sd*bc03sc*i*
alias:          pci:v00008086d00002582sv*sd*bc03sc*i*
alias:          pci:v00008086d00002572sv*sd*bc03sc*i*
alias:          pci:v00008086d0000358Esv*sd*bc03sc*i*
alias:          pci:v00008086d00003582sv*sd*bc03sc*i*
alias:          pci:v00008086d00002562sv*sd*bc03sc*i*
alias:          pci:v00008086d00003577sv*sd*bc03sc*i*
depends:        drm,drm_kms_helper,video,i2c-algo-bit
retpoline:      Y
intree:         Y
name:           i915
vermagic:       5.3.0-51-generic SMP mod_unload 
signat:         PKCS#7
signer:         
sig_key:        
sig_hashalgo:   md4
parm:           modeset:Use kernel modesetting [KMS] (0=disable, 1=on, -1=force vga console preference [default]) (int)
parm:           enable_dc:Enable power-saving display C-states. (-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6) (int)
parm:           enable_fbc:Enable frame buffer compression for power savings (default: -1 (use per-chip default)) (int)
parm:           lvds_channel_mode:Specify LVDS channel mode (0=probe BIOS [default], 1=single-channel, 2=dual-channel) (int)
parm:           panel_use_ssc:Use Spread Spectrum Clock with panels [LVDS/eDP] (default: auto from VBT) (int)
parm:           vbt_sdvo_panel_type:Override/Ignore selection of SDVO panel mode in the VBT (-2=ignore, -1=auto [default], index in VBT BIOS table) (int)
parm:           reset:Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default]) (int)
parm:           vbt_firmware:Load VBT from specified file under /lib/firmware (charp)
parm:           error_capture:Record the GPU state following a hang. This information in /sys/class/drm/card<N>/error is vital for triaging and debugging hangs. (bool)
parm:           enable_hangcheck:Periodically check GPU activity for detecting hangs. WARNING: Disabling this can cause system wide hangs. (default: true) (bool)
parm:           enable_psr:Enable PSR (-1=use per-chip default, 0=disabled [default], 1=enabled)  (int)
parm:           force_probe:Force probe the driver for specified devices. See CONFIG_DRM_I915_FORCE_PROBE for details. (charp)
parm:           alpha_support:Deprecated. See i915.force_probe. (bool)
parm:           disable_power_well:Disable display power wells when possible (-1=auto [default], 0=power wells always on, 1=power wells disabled when possible) (int)
parm:           enable_ips:Enable IPS (default: true) (int)
parm:           fastboot:Try to skip unnecessary mode sets at boot time (0=disabled, 1=enabled) Default: -1 (use per-chip default) (int)
parm:           prefault_disable:Disable page prefaulting for pread/pwrite/reloc (default:false). For developers only. (bool)
parm:           load_detect_test:Force-enable the VGA load detect code for testing (default:false). For developers only. (bool)
parm:           force_reset_modeset_test:Force a modeset during gpu reset for testing (default:false). For developers only. (bool)
parm:           invert_brightness:Invert backlight brightness (-1 force normal, 0 machine defaults, 1 force inversion), please report PCI device ID, subsystem vendor and subsystem device ID to dri-devel@lists.freedesktop.org, if your machine needs it. It will then be included in an upcoming module version. (int)
parm:           disable_display:Disable display (default: false) (bool)
parm:           mmio_debug:Enable the MMIO debug code for the first N failures (default: off). This may negatively affect performance. (int)
parm:           verbose_state_checks:Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions. (bool)
parm:           nuclear_pageflip:Force enable atomic functionality on platforms that don't have full support yet. (bool)
parm:           edp_vswing:Ignore/Override vswing pre-emph table selection from VBT (0=use value from vbt [default], 1=low power swing(200mV),2=default swing(400mV)) (int)
parm:           enable_guc:Enable GuC load for GuC submission and/or HuC load. Required functionality can be selected using bitmask values. (-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load) (int)
parm:           guc_log_level:GuC firmware logging level. Requires GuC to be loaded. (-1=auto [default], 0=disable, 1..4=enable with verbosity min..max) (int)
parm:           guc_firmware_path:GuC firmware path to use instead of the default one (charp)
parm:           huc_firmware_path:HuC firmware path to use instead of the default one (charp)
parm:           dmc_firmware_path:DMC firmware path to use instead of the default one (charp)
parm:           enable_dp_mst:Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true) (bool)
parm:           enable_dpcd_backlight:Enable support for DPCD backlight control (default:false) (bool)
parm:           enable_gvt:Enable support for Intel GVT-g graphics virtualization host support(default:false) (bool)

Last edited by HaughtyGrayAlien (2020-05-16 16:03:12)

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#2 2020-05-16 14:24:49

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 9,974

Re: [SOLVED] Tracking down i915 seg fault

What application and what does the segfault look like? Can you see that in dmesg/your journal that specifically i915 leads to a dump? Which software versions run on mint in comparison? (particularly mesa)

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#3 2020-05-16 15:38:58

HaughtyGrayAlien
Member
Registered: 2020-05-16
Posts: 7

Re: [SOLVED] Tracking down i915 seg fault

Firstly, thank you for the reply.

The application is Houdini by SideFX software. It is VFX/3D modelling software.

No I absolutely do not know for certian that i915 is the cause of the issue. That is my own supposition based on the developer's response. It could be something else entirely.

I followed the link you gave, but there is no core dump for this process. Simply nothing listed. Having read that Wiki page, I don't understand why, as it states that Systemd's default behaviour is to save a core dump for all processes... also I checked the ulimit command and it is unlimited... this confuses me.

The version of the software running on Mint is the exact same as running on Arch. It's literally the same file - I boot into Mint and mount my Arch pratition and run it from there.

Not sure how helpful it will be, but I get this in the terminal

[lewis@lewis-laptop-arch:~]$ 353189: Fatal error: Segmentation fault (sent by pid 296)
Saving application data to /tmp/houdini_temp/crash.untitled.lewis_353189.hipnc
Crash log saved to /tmp/houdini_temp/crash.untitled.lewis_353189_log.txt

And here is the application's own log file as referenced above

Crash report from lewis; Houdini FX Version 18.0.460 [linux-x86_64-gcc6.3]
Uptime 24 seconds
Sat May 16 16:24:21 2020
Caught signal 11

Traceback from 353189 ThreadId=0x7f2914473c80
AP_Interface::coreDumpChaser(UTsignalHandlerArg) <libHoudiniUI.so>
AP_Interface::si_CrashHandler::chaser(UTsignalHandlerArg) <libHoudiniUI.so>
signalCallback(UTsignalHandlerArg) <libHoudiniUT.so>
UT_Signal::UT_ComboSignalHandler::operator()(int, siginfo_t*, void*) const <libHoudiniUT.so>
UT_Signal::processSignal(int, siginfo_t*, void*) <libHoudiniUT.so>
__funlockfile <libpthread.so.0>
nouveau_drm_screen_create <iris_dri.so>
nouveau_drm_screen_create <iris_dri.so>
__driDriverGetExtensions_virtio_gpu <iris_dri.so>
__driDriverGetExtensions_virtio_gpu <iris_dri.so>
__driDriverGetExtensions_virtio_gpu <iris_dri.so>
RE_RenderFlush::draw(RE_Render*) <libHoudiniUI.so>
RE_RenderFlush::flush(bool) <libHoudiniUI.so>
RE_OGLRender::flush(int) <libHoudiniUI.so>
UI_Feel::redrawDirtyMe(UI_RedrawType) <libHoudiniUI.so>
UI_Feel::redraw(UI_RedrawType) <libHoudiniUI.so>
UI_ErrorManager::redrawDependents() <libHoudiniUI.so>
IPR_ViewportFeel2D::endLocate(UI_Event*) <libHoudiniAPPS2.so>
UI_Window::locatedInside(UI_Feel*, UI_Event*) [clone .localalias.167] <libHoudiniUI.so>
UI_Window::handleEvent(UI_Event*) <libHoudiniUI.so>
UI_Queue::processNextEvent() <libHoudiniUI.so>
UI_Queue::drain() <libHoudiniUI.so>
UI_Queue::eventLoop() <libHoudiniUI.so>
main <libHoudiniUI.so>
__libc_start_main <libc.so.6>
main <happrentice-bin>

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#4 2020-05-16 15:42:13

HaughtyGrayAlien
Member
Registered: 2020-05-16
Posts: 7

Re: [SOLVED] Tracking down i915 seg fault

Just realised that you also asked me about journal and dmesg output. I will look into that now.

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#5 2020-05-16 15:46:32

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 9,974

Re: [SOLVED] Tracking down i915 seg fault

I'm rather meaning software versions for mesa (the userspace OpenGL implementation), there have been some issues in very recent mesa versions, update your system, ensure you are on mesa 20.0.7-2 at the minimum, should the issue persist despite that try falling back on the older OpenGL driver: https://wiki.archlinux.org/index.php/In … ver_(i965)

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#6 2020-05-16 15:55:07

HaughtyGrayAlien
Member
Registered: 2020-05-16
Posts: 7

Re: [SOLVED] Tracking down i915 seg fault

I have the package mesa 20.7.0-2 installed. So I think the answer to your question is yes - latest version installed.

I will try your suggestion about falling back on the old OpenGl driver as well.

Can you speculate on why I can't see the core dumps from this application? I know it won't help me, but it'll bug me not knowing why...

Thanks again

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#7 2020-05-16 16:02:46

HaughtyGrayAlien
Member
Registered: 2020-05-16
Posts: 7

Re: [SOLVED] Tracking down i915 seg fault

Falling back to the older OpenGl driver seems to fix it entirely! Wow. Thank you so much!

I guess it's a bug with the Iris driver? Or at least an incompatibility.

EDIT: Looking into it more, this makes total sense. Mint is using Mesa <20, where the default will be i965. The developer officially supports Ubuntu and derivatives, so that's why they have never seen this issue. My world makes sense again :-)

Last edited by HaughtyGrayAlien (2020-05-16 16:34:35)

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