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#1 2017-11-07 23:36:46

cfr
Member
From: Cymru
Registered: 2011-11-27
Posts: 6,068

[drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal timeout

I just ran into this kernel issue and forced a hard reboot. The trace from journalctl is:

Tach 07 22:48:49 MyComputer kernel: [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal timeout (has irq: 1)!
Tach 07 22:48:52 MyComputer kernel: DC6 already programmed to be enabled.
Tach 07 22:48:52 MyComputer kernel: ------------[ cut here ]------------
Tach 07 22:48:52 MyComputer kernel: WARNING: CPU: 3 PID: 29083 at drivers/gpu/drm/i915/intel_runtime_pm.c:725 skl_enable_dc6+0xa4/0xb0 [i915]
Tach 07 22:48:52 MyComputer kernel: Modules linked in: fuse cmac rfcomm ccm uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev media btusb btrtl ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv6 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ipv6 nf_defrag_ipv6 joydev xt_recent mousedev xt_conntrack nf_conntrack libcrc32c crc32c_generic ip6table_filter iptable_filter ip6_tables bnep wmi_bmof snd_soc_skl iTCO_wdt iTCO_vendor_support snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_sst_match tpm_crb snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_soc_core snd_compress snd_pcm_dmaengine ac97_bus arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass intel_cstate
Tach 07 22:48:52 MyComputer kernel:  intel_rapl_perf nls_iso8859_1 nls_cp437 vfat fat iwlmvm mac80211 input_leds pcspkr psmouse iwlwifi cfg80211 rtsx_pci_ms memstick snd_hda_intel snd_hda_codec e1000e snd_hda_core snd_hwdep ptp i2c_i801 pps_core snd_pcm snd_timer idma64 mei_me mei shpchp intel_lpss_pci hci_uart btbcm btqca btintel thinkpad_acpi ucsi_acpi bluetooth typec_ucsi nvram intel_pch_thermal snd soundcore ecdh_generic typec thermal wmi i2c_hid battery led_class ac rfkill pinctrl_sunrisepoint pinctrl_intel intel_lpss_acpi intel_lpss tpm_tis tpm_tis_core tpm evdev mac_hid acpi_pad sch_fq_codel coretemp msr crypto_user acpi_call(O) ip_tables x_tables ext4 crc16 mbcache jbd2 fscrypto algif_skcipher af_alg hid_generic usbhid hid dm_crypt dm_mod dax crct10dif_pclmul rtsx_pci_sdmmc crc32_pclmul crc32c_intel mmc_core ghash_clmulni_intel
Tach 07 22:48:52 MyComputer kernel:  pcbc serio_raw atkbd libps2 aesni_intel aes_x86_64 crypto_simd glue_helper cryptd xhci_pci nvme xhci_hcd nvme_core rtsx_pci usbcore usb_common i8042 serio i915 video button intel_gtt i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm agpgart
Tach 07 22:48:52 MyComputer kernel: CPU: 3 PID: 29083 Comm: kworker/3:4 Tainted: G           O    4.13.11-1-ARCH #1
Tach 07 22:48:52 MyComputer kernel: Hardware name: LENOVO 20HNCTO1WW/20HNCTO1WW, BIOS R0IET42W (1.20 ) 08/09/2017
Tach 07 22:48:52 MyComputer kernel: Workqueue: events edp_panel_vdd_work [i915]
Tach 07 22:48:52 MyComputer kernel: task: ffff953aefb98f80 task.stack: ffffaa3a02690000
Tach 07 22:48:52 MyComputer kernel: RIP: 0010:skl_enable_dc6+0xa4/0xb0 [i915]
Tach 07 22:48:52 MyComputer kernel: RSP: 0018:ffffaa3a02693dc8 EFLAGS: 00010282
Tach 07 22:48:52 MyComputer kernel: RAX: 0000000000000025 RBX: ffff953b61b68000 RCX: 0000000000000000
Tach 07 22:48:52 MyComputer kernel: RDX: 0000000000000000 RSI: ffff953b6f58dc78 RDI: ffff953b6f58dc78
Tach 07 22:48:52 MyComputer kernel: RBP: ffffaa3a02693dd0 R08: 00000000000027dc R09: 0000000000000004
Tach 07 22:48:52 MyComputer kernel: R10: 0000000000000000 R11: 0000000000000001 R12: ffff953b61b68000
Tach 07 22:48:52 MyComputer kernel: R13: ffff953b61b6cb80 R14: ffffffffc032a098 R15: 0000000010000000
Tach 07 22:48:52 MyComputer kernel: FS:  0000000000000000(0000) GS:ffff953b6f580000(0000) knlGS:0000000000000000
Tach 07 22:48:52 MyComputer kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Tach 07 22:48:52 MyComputer kernel: CR2: 00007fb26c00c000 CR3: 0000000099a09000 CR4: 00000000003406e0
Tach 07 22:48:52 MyComputer kernel: Call Trace:
Tach 07 22:48:52 MyComputer kernel:  gen9_dc_off_power_well_disable+0x2a/0x40 [i915]
Tach 07 22:48:52 MyComputer kernel:  intel_power_well_disable+0x3e/0x50 [i915]
Tach 07 22:48:52 MyComputer kernel:  intel_display_power_put+0xb9/0x120 [i915]
Tach 07 22:48:52 MyComputer kernel:  edp_panel_vdd_work+0x5f/0x70 [i915]
Tach 07 22:48:52 MyComputer kernel:  process_one_work+0x1de/0x430
Tach 07 22:48:52 MyComputer kernel:  worker_thread+0x48/0x400
Tach 07 22:48:52 MyComputer kernel:  kthread+0x125/0x140
Tach 07 22:48:52 MyComputer kernel:  ? process_one_work+0x430/0x430
Tach 07 22:48:52 MyComputer kernel:  ? kthread_create_on_node+0x70/0x70
Tach 07 22:48:52 MyComputer kernel:  ret_from_fork+0x25/0x30
Tach 07 22:48:52 MyComputer kernel: Code: 05 3e 15 15 00 01 e8 fd 5e ed cc 0f ff eb 99 80 3d 2d 15 15 00 00 75 a7 48 c7 c7 00 9e 32 c0 c6 05 1d 15 15 00 01 e8 dd 5e ed cc <0f> ff eb 90 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 83 bf 38 
Tach 07 22:48:52 MyComputer kernel: ---[ end trace 28f6d31f031c8e27 ]---
Tach 07 22:48:52 MyComputer kernel: [drm:gen9_set_dc_state [i915]] *ERROR* DC state mismatch (0x0 -> 0x2)
Tach 07 22:48:53 MyComputer kernel: [drm:i915_gem_idle_work_handler [i915]] *ERROR* Timeout waiting for engines to idle

Could somebody who understands these things possibly tell me if this is the bug covered by https://bugs.freedesktop.org/show_bug.cgi?id=102221? If so, I believe the fix is on the way and there's no point in my reporting the problem again. The bug says that the fix is in firmware planned to be released the week following 26th October, so I figure if this is the right bug, I should get new firmware which fixes it in the not too distant future .... hopefully.

EDIT: Also, does anybody know of a workaround to avoid this in the meantime?

Last edited by cfr (2017-11-08 00:12:49)


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