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#1 2020-01-07 17:59:55

jandyp
Member
Registered: 2020-01-07
Posts: 2

iwlwifi periodically causes hard lockup on CPU

First off, I realize this is similar to another iwlwifi issue reported in this forum. I didn't just post this there because it manifests differently.

I've noticed for a while that my computer keeps freezing intermittedly for a few seconds, then working normal again for a while. I went from suspecting several different websites (since it happened more often when browsing), to suspecting applications, to thinking my computer was compromised (since the problem didn't appear when I completely disabled internet access, and it severely hampered being able to update the system due to timing out downloads), to wiping my entire linux system and replacing it with archlinux proper (had manjaro before).

While the wiping was apparently not necessary, it at least helped me by pointing at the culprit, because the issue reappeared during the archlinux installation procedure, with nicely visible errors in archiso's console.

Here's the unfiltered tail of dmesg after a few lockups, still during installation in archiso.

[ 9955.995525] iwlwifi 0000:05:00.0: Failing on timeout while stopping DMA channel 8 [0xa5a5a5a2]
[ 9956.016129] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
[ 9956.129914] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
[ 9956.194770] iwlwifi 0000:05:00.0: FW already configured (0) - re-configuring
[ 9956.209513] iwlwifi 0000:05:00.0: BIOS contains WGDS but no WRDS
[ 9988.944108] iwlwifi 0000:05:00.0: Queue 10 is inactive on fifo 2 and stuck for 10000 ms. SW [115, 122] HW [162, 162] FH TRB=0x0a5a5a5a2
[ 9988.945181] iwlwifi 0000:05:00.0: Hardware error detected. Restarting.
[ 9988.949415] iwlwifi 0000:05:00.0: HW error, resetting before reading
[ 9988.957955] iwlwifi 0000:05:00.0: Start IWL Error Log Dump:
[ 9988.958556] iwlwifi 0000:05:00.0: Status: 0x00000040, count: -1091067658
[ 9988.959154] iwlwifi 0000:05:00.0: Loaded firmware version: 46.ceaaecdc.0
[ 9988.959753] iwlwifi 0000:05:00.0: 0x7AA4210C | ADVANCED_SYSASSERT          
[ 9988.960353] iwlwifi 0000:05:00.0: 0xBDBCF7F8 | trm_hw_status0
[ 9988.960945] iwlwifi 0000:05:00.0: 0x10262997 | trm_hw_status1
[ 9988.961586] iwlwifi 0000:05:00.0: 0xFBFC7EB8 | branchlink2
[ 9988.962213] iwlwifi 0000:05:00.0: 0x65790010 | interruptlink1
[ 9988.962842] iwlwifi 0000:05:00.0: 0xA8F17BCB | interruptlink2
[ 9988.963471] iwlwifi 0000:05:00.0: 0x995F40A0 | data1
[ 9988.964101] iwlwifi 0000:05:00.0: 0x4EBAF7EE | data2
[ 9988.964724] iwlwifi 0000:05:00.0: 0x06016103 | data3
[ 9988.965341] iwlwifi 0000:05:00.0: 0x797F6FB7 | beacon time
[ 9988.965960] iwlwifi 0000:05:00.0: 0x71208AD1 | tsf low
[ 9988.966572] iwlwifi 0000:05:00.0: 0x1FAE7AAF | tsf hi
[ 9988.967184] iwlwifi 0000:05:00.0: 0x940EE79E | time gp1
[ 9988.967792] iwlwifi 0000:05:00.0: 0xF7FF599F | time gp2
[ 9988.968397] iwlwifi 0000:05:00.0: 0xD320110E | uCode revision type
[ 9988.969003] iwlwifi 0000:05:00.0: 0x5D777BDB | uCode version major
[ 9988.969608] iwlwifi 0000:05:00.0: 0x00046B6B | uCode version minor
[ 9988.970211] iwlwifi 0000:05:00.0: 0xDF67FBDB | hw version
[ 9988.970814] iwlwifi 0000:05:00.0: 0x00E1D24D | board version
[ 9988.971413] iwlwifi 0000:05:00.0: 0xF4069004 | hcmd
[ 9988.972009] iwlwifi 0000:05:00.0: 0x35BA70FE | isr0
[ 9988.972605] iwlwifi 0000:05:00.0: 0x04F6C689 | isr1
[ 9988.973199] iwlwifi 0000:05:00.0: 0x313BF97D | isr2
[ 9988.973789] iwlwifi 0000:05:00.0: 0x16E58000 | isr3
[ 9988.974370] iwlwifi 0000:05:00.0: 0x9D2F624F | isr4
[ 9988.974947] iwlwifi 0000:05:00.0: 0x45226E40 | last cmd Id
[ 9988.975524] iwlwifi 0000:05:00.0: 0x8F7B637D | wait_event
[ 9988.976102] iwlwifi 0000:05:00.0: 0x7238C351 | l2p_control
[ 9988.976678] iwlwifi 0000:05:00.0: 0xED5FE2D7 | l2p_duration
[ 9988.977255] iwlwifi 0000:05:00.0: 0x9E6126AA | l2p_mhvalid
[ 9988.977829] iwlwifi 0000:05:00.0: 0x4EFEAFEE | l2p_addr_match
[ 9988.978399] iwlwifi 0000:05:00.0: 0x910A3D09 | lmpm_pmg_sel
[ 9988.978966] iwlwifi 0000:05:00.0: 0xDBAECFF6 | timestamp
[ 9988.979529] iwlwifi 0000:05:00.0: 0x0C910512 | flow_handler
[ 9988.980137] iwlwifi 0000:05:00.0: Start IWL Error Log Dump:
[ 9988.980694] iwlwifi 0000:05:00.0: Status: 0x00000040, count: -1644844808
[ 9988.981250] iwlwifi 0000:05:00.0: 0xA0E9C091 | ADVANCED_SYSASSERT
[ 9988.981806] iwlwifi 0000:05:00.0: 0xE1DA60D8 | umac branchlink1
[ 9988.982362] iwlwifi 0000:05:00.0: 0x6E0C4293 | umac branchlink2
[ 9988.982916] iwlwifi 0000:05:00.0: 0x8DF8DEBB | umac interruptlink1
[ 9988.983471] iwlwifi 0000:05:00.0: 0x478AD251 | umac interruptlink2
[ 9988.984024] iwlwifi 0000:05:00.0: 0x302F6776 | umac data1
[ 9988.984572] iwlwifi 0000:05:00.0: 0xBFC7387B | umac data2
[ 9988.985117] iwlwifi 0000:05:00.0: 0xB4FDF67A | umac data3
[ 9988.985658] iwlwifi 0000:05:00.0: 0x9C010CC6 | umac major
[ 9988.986191] iwlwifi 0000:05:00.0: 0xCA7DD9B4 | umac minor
[ 9988.986688] iwlwifi 0000:05:00.0: 0xD8848099 | frame pointer
[ 9988.987187] iwlwifi 0000:05:00.0: 0x1E1DFBF2 | stack pointer
[ 9988.987682] iwlwifi 0000:05:00.0: 0x405206E6 | last host cmd
[ 9988.988176] iwlwifi 0000:05:00.0: 0x7CA7FECE | isr status reg
[ 9988.988676] iwlwifi 0000:05:00.0: Fseq Registers:
[ 9988.989235] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_ERROR_CODE
[ 9988.989861] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_TOP_INIT_VERSION
[ 9988.990483] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_CNVIO_INIT_VERSION
[ 9988.991114] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_OTP_VERSION
[ 9988.991718] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_TOP_CONTENT_VERSION
[ 9988.992321] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_ALIVE_TOKEN
[ 9988.992919] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_CNVI_ID
[ 9988.993511] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_CNVR_ID
[ 9988.994097] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVI_AUX_MISC_CHIP
[ 9988.994681] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVR_AUX_MISC_CHIP
[ 9988.995230] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[ 9988.995754] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 9988.996146] iwlwifi 0000:05:00.0: Collecting data: trigger 2 fired.
[ 9988.996148] ieee80211 phy0: Hardware restart was requested
[10005.279313] NMI watchdog: Watchdog detected hard LOCKUP on cpu 1
[10005.279313] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat ext4 crc32c_generic mbcache jbd2 ccm 8021q garp mrp stp llc amdgpu iwlmvm mac80211 intel_rapl_msr intel_rapl_common wl(POE) libarc4 x86_pkg_temp_thermal intel_powerclamp snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_xtensa_dsp snd_sof_intel_hda_common snd_soc_hdac_hda gpu_sched snd_sof_intel_hda snd_sof snd_hda_ext_core snd_soc_acpi_intel_match i2c_algo_bit ttm snd_soc_acpi coretemp drm_kms_helper snd_soc_core kvm_intel drm btusb btrtl btbcm btintel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_compress snd_hda_codec_hdmi ac97_bus bluetooth ledtrig_audio snd_pcm_dmaengine snd_hda_intel snd_intel_nhlt snd_hda_codec eeepc_wmi asus_wmi agpgart snd_hda_core battery irqbypass wmi_bmof syscopyarea iwlwifi iTCO_wdt sysfillrect ecdh_generic crct10dif_pclmul ghash_clmulni_intel sysimgblt iTCO_vendor_support fb_sys_fops cfg80211 sparse_keymap ecc snd_hwdep mousedev joydev mei_hdcp intel_cstate crc16 evdev input_leds
[10005.279323]  snd_pcm intel_uncore intel_rapl_perf rfkill snd_timer snd pcspkr soundcore mac_hid mei_me ie31200_edac mei i2c_i801 pkcs8_key_parser ip_tables x_tables overlay squashfs loop isofs uas usb_storage hid_logitech_hidpp hid_logitech_dj hid_generic usbhid hid sr_mod cdrom sd_mod crc32_pclmul crc32c_intel ahci libahci aesni_intel glue_helper libata xhci_pci crypto_simd cryptd e1000e xhci_hcd scsi_mod wmi
[10005.279328] CPU: 1 PID: 323 Comm: kworker/1:2 Tainted: P           OE     5.4.6-arch3-1 #1
[10005.279328] Hardware name: System manufacturer System Product Name/TUF H370-PRO GAMING, BIOS 1303 03/20/2019
[10005.279329] Workqueue: events iwl_fw_error_dump_wk [iwlwifi]
[10005.279329] RIP: 0010:iwl_trans_pcie_read32+0x10/0x20 [iwlwifi]
[10005.279330] Code: f6 48 03 b7 78 8f 00 00 89 16 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 89 f6 48 03 b7 78 8f 00 00 8b 06 <c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 48
[10005.279330] RSP: 0018:ffffb625c0587d20 EFLAGS: 00000082
[10005.279330] RAX: 00000000a5a5a5a2 RBX: ffff9b14369d0018 RCX: 0000000000000011
[10005.279331] RDX: 0000000000400000 RSI: ffffb625c082841c RDI: ffff9b14369d0018
[10005.279331] RBP: 000000000000041c R08: 0000000000003a98 R09: 0000000000000011
[10005.279331] R10: ffff9b146dffcc40 R11: 0000000000000000 R12: ffffb625c5f0b139
[10005.279331] R13: 0000000000400000 R14: 0000000000000002 R15: ffff9b14310dacd8
[10005.279332] FS:  0000000000000000(0000) GS:ffff9b144da40000(0000) knlGS:0000000000000000
[10005.279332] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[10005.279332] CR2: 0000562bcd0a70c8 CR3: 000000064280a005 CR4: 00000000003606e0
[10005.279332] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[10005.279333] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[10005.279333] Call Trace:
[10005.279333]  iwl_read32+0x1f/0x90 [iwlwifi]
[10005.279333]  iwl_trans_pcie_read_mem+0x79/0xc0 [iwlwifi]
[10005.279334]  iwl_fw_dump_mem.isra.0.part.0+0x48/0x80 [iwlwifi]
[10005.279334]  iwl_fw_dbg_collect_sync+0x5ca/0x19d0 [iwlwifi]
[10005.279334]  ? __switch_to+0x80/0x470
[10005.279334]  ? _raw_spin_lock_irqsave+0x26/0x50
[10005.279334]  iwl_fw_error_dump_wk+0x53/0x80 [iwlwifi]
[10005.279335]  process_one_work+0x1e2/0x3b0
[10005.279335]  worker_thread+0x4a/0x3d0
[10005.279335]  kthread+0xfb/0x130
[10005.279335]  ? process_one_work+0x3b0/0x3b0
[10005.279335]  ? kthread_park+0x90/0x90
[10005.279335]  ret_from_fork+0x35/0x40
[10018.054430] iwlwifi 0000:05:00.0: Failing on timeout while stopping DMA channel 8 [0xa5a5a5a2]
[10018.075470] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
[10018.189346] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
[10018.254586] iwlwifi 0000:05:00.0: FW already configured (0) - re-configuring
[10018.269736] iwlwifi 0000:05:00.0: BIOS contains WGDS but no WRDS
[10043.773177] iwlwifi 0000:05:00.0: Queue 10 is inactive on fifo 2 and stuck for 10000 ms. SW [134, 141] HW [162, 162] FH TRB=0x0a5a5a5a2
[10043.774244] iwlwifi 0000:05:00.0: Hardware error detected. Restarting.
[10043.778328] iwlwifi 0000:05:00.0: HW error, resetting before reading
[10043.787082] iwlwifi 0000:05:00.0: Start IWL Error Log Dump:
[10043.787730] iwlwifi 0000:05:00.0: Status: 0x00000040, count: -1091051274
[10043.788378] iwlwifi 0000:05:00.0: Loaded firmware version: 46.ceaaecdc.0
[10043.789028] iwlwifi 0000:05:00.0: 0x7A20200C | ADVANCED_SYSASSERT          
[10043.789684] iwlwifi 0000:05:00.0: 0xBD9EF6F8 | trm_hw_status0
[10043.790334] iwlwifi 0000:05:00.0: 0x10260997 | trm_hw_status1
[10043.790981] iwlwifi 0000:05:00.0: 0xFB7E7EB8 | branchlink2
[10043.791677] iwlwifi 0000:05:00.0: 0xE5790410 | interruptlink1
[10043.792363] iwlwifi 0000:05:00.0: 0xA2F17BCB | interruptlink2
[10043.793050] iwlwifi 0000:05:00.0: 0xD95C40A0 | data1
[10043.793731] iwlwifi 0000:05:00.0: 0x4EBEF7EE | data2
[10043.794409] iwlwifi 0000:05:00.0: 0x0203E101 | data3
[10043.795087] iwlwifi 0000:05:00.0: 0x79BF4BB7 | beacon time
[10043.795766] iwlwifi 0000:05:00.0: 0x712082D3 | tsf low
[10043.796447] iwlwifi 0000:05:00.0: 0xBFAE7BBF | tsf hi
[10043.797124] iwlwifi 0000:05:00.0: 0x9406E79E | time gp1
[10043.797802] iwlwifi 0000:05:00.0: 0xF7FE5D9F | time gp2
[10043.798480] iwlwifi 0000:05:00.0: 0xD320510E | uCode revision type
[10043.799163] iwlwifi 0000:05:00.0: 0x5D777BDB | uCode version major
[10043.799850] iwlwifi 0000:05:00.0: 0x00047B6A | uCode version minor
[10043.800533] iwlwifi 0000:05:00.0: 0xFF67FED9 | hw version
[10043.801218] iwlwifi 0000:05:00.0: 0x00E1F66D | board version
[10043.801903] iwlwifi 0000:05:00.0: 0x74469006 | hcmd
[10043.802589] iwlwifi 0000:05:00.0: 0x35BA70FE | isr0
[10043.803274] iwlwifi 0000:05:00.0: 0x04E6C781 | isr1
[10043.803956] iwlwifi 0000:05:00.0: 0x313BF97C | isr2
[10043.804637] iwlwifi 0000:05:00.0: 0x06A5A004 | isr3
[10043.805317] iwlwifi 0000:05:00.0: 0x9CBF625F | isr4
[10043.805995] iwlwifi 0000:05:00.0: 0x45223E40 | last cmd Id
[10043.806677] iwlwifi 0000:05:00.0: 0x8F7B637D | wait_event
[10043.807359] iwlwifi 0000:05:00.0: 0x72B84351 | l2p_control
[10043.808044] iwlwifi 0000:05:00.0: 0xED5FA2D7 | l2p_duration
[10043.808732] iwlwifi 0000:05:00.0: 0xB661460A | l2p_mhvalid
[10043.809424] iwlwifi 0000:05:00.0: 0x4AFCAFEE | l2p_addr_match
[10043.810117] iwlwifi 0000:05:00.0: 0x910A3D09 | lmpm_pmg_sel
[10043.810809] iwlwifi 0000:05:00.0: 0xCBAE8FF6 | timestamp
[10043.811501] iwlwifi 0000:05:00.0: 0x0D811512 | flow_handler
[10043.812218] iwlwifi 0000:05:00.0: Start IWL Error Log Dump:
[10043.812864] iwlwifi 0000:05:00.0: Status: 0x00000040, count: -1913280279
[10043.813500] iwlwifi 0000:05:00.0: 0xA0E9C091 | ADVANCED_SYSASSERT
[10043.814129] iwlwifi 0000:05:00.0: 0xA1D26859 | umac branchlink1
[10043.814739] iwlwifi 0000:05:00.0: 0x6C0C4213 | umac branchlink2
[10043.815311] iwlwifi 0000:05:00.0: 0x8FF8AABE | umac interruptlink1
[10043.815880] iwlwifi 0000:05:00.0: 0x47825A51 | umac interruptlink2
[10043.816432] iwlwifi 0000:05:00.0: 0x3F2B6470 | umac data1
[10043.816954] iwlwifi 0000:05:00.0: 0xBFC7397B | umac data2
[10043.817470] iwlwifi 0000:05:00.0: 0xB4FDF67A | umac data3
[10043.817983] iwlwifi 0000:05:00.0: 0x9C000CC6 | umac major
[10043.818492] iwlwifi 0000:05:00.0: 0xEE3D59B5 | umac minor
[10043.818998] iwlwifi 0000:05:00.0: 0xC8848291 | frame pointer
[10043.819505] iwlwifi 0000:05:00.0: 0x9A15FBF2 | stack pointer
[10043.820011] iwlwifi 0000:05:00.0: 0x40420462 | last host cmd
[10043.820514] iwlwifi 0000:05:00.0: 0x7CA7FECE | isr status reg
[10043.821023] iwlwifi 0000:05:00.0: Fseq Registers:
[10043.821579] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_ERROR_CODE
[10043.822183] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_TOP_INIT_VERSION
[10043.822805] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_CNVIO_INIT_VERSION
[10043.823422] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_OTP_VERSION
[10043.824023] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_TOP_CONTENT_VERSION
[10043.824624] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_ALIVE_TOKEN
[10043.825220] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_CNVI_ID
[10043.825812] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | FSEQ_CNVR_ID
[10043.826412] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVI_AUX_MISC_CHIP
[10043.826967] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVR_AUX_MISC_CHIP
[10043.827529] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[10043.828052] iwlwifi 0000:05:00.0: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[10043.828442] iwlwifi 0000:05:00.0: Collecting data: trigger 2 fired.
[10043.828444] ieee80211 phy0: Hardware restart was requested
[10060.098917] perf: interrupt took too long (4691 > 4657), lowering kernel.perf_event_max_sample_rate to 42600
[10060.098917] NMI watchdog: Watchdog detected hard LOCKUP on cpu 1
[10060.098918] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat ext4 crc32c_generic mbcache jbd2 ccm 8021q garp mrp stp llc amdgpu iwlmvm mac80211 intel_rapl_msr intel_rapl_common wl(POE) libarc4 x86_pkg_temp_thermal intel_powerclamp snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_xtensa_dsp snd_sof_intel_hda_common snd_soc_hdac_hda gpu_sched snd_sof_intel_hda snd_sof snd_hda_ext_core snd_soc_acpi_intel_match i2c_algo_bit ttm snd_soc_acpi coretemp drm_kms_helper snd_soc_core kvm_intel drm btusb btrtl btbcm btintel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_compress snd_hda_codec_hdmi ac97_bus bluetooth ledtrig_audio snd_pcm_dmaengine snd_hda_intel snd_intel_nhlt snd_hda_codec eeepc_wmi asus_wmi agpgart snd_hda_core battery irqbypass wmi_bmof syscopyarea iwlwifi iTCO_wdt sysfillrect ecdh_generic crct10dif_pclmul ghash_clmulni_intel sysimgblt iTCO_vendor_support fb_sys_fops cfg80211 sparse_keymap ecc snd_hwdep mousedev joydev mei_hdcp intel_cstate crc16 evdev input_leds
[10060.098927]  snd_pcm intel_uncore intel_rapl_perf rfkill snd_timer snd pcspkr soundcore mac_hid mei_me ie31200_edac mei i2c_i801 pkcs8_key_parser ip_tables x_tables overlay squashfs loop isofs uas usb_storage hid_logitech_hidpp hid_logitech_dj hid_generic usbhid hid sr_mod cdrom sd_mod crc32_pclmul crc32c_intel ahci libahci aesni_intel glue_helper libata xhci_pci crypto_simd cryptd e1000e xhci_hcd scsi_mod wmi
[10060.098932] CPU: 1 PID: 323 Comm: kworker/1:2 Tainted: P           OE     5.4.6-arch3-1 #1
[10060.098932] Hardware name: System manufacturer System Product Name/TUF H370-PRO GAMING, BIOS 1303 03/20/2019
[10060.098933] Workqueue: events iwl_fw_error_dump_wk [iwlwifi]
[10060.098933] RIP: 0010:iwl_trans_pcie_read32+0x10/0x20 [iwlwifi]
[10060.098934] Code: f6 48 03 b7 78 8f 00 00 89 16 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 89 f6 48 03 b7 78 8f 00 00 8b 06 <c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 48
[10060.098934] RSP: 0018:ffffb625c0587d20 EFLAGS: 00000082
[10060.098934] RAX: 00000000a5a5a5a2 RBX: ffff9b14369d0018 RCX: 0000000000000011
[10060.098935] RDX: 0000000000400000 RSI: ffffb625c082841c RDI: ffff9b14369d0018
[10060.098935] RBP: 000000000000041c R08: 0000000000003a98 R09: 0000000000000011
[10060.098935] R10: ffff9b146dffcc40 R11: 0000000000000000 R12: ffffb625c64d0139
[10060.098935] R13: 0000000000400000 R14: 0000000000000002 R15: ffff9b14310dacd8
[10060.098936] FS:  0000000000000000(0000) GS:ffff9b144da40000(0000) knlGS:0000000000000000
[10060.098936] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[10060.098936] CR2: 0000562bcd0a70c8 CR3: 000000064280a005 CR4: 00000000003606e0
[10060.098936] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[10060.098937] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[10060.098937] Call Trace:
[10060.098937]  iwl_read32+0x1f/0x90 [iwlwifi]
[10060.098937]  iwl_trans_pcie_read_mem+0x79/0xc0 [iwlwifi]
[10060.098937]  iwl_fw_dump_mem.isra.0.part.0+0x48/0x80 [iwlwifi]
[10060.098938]  iwl_fw_dbg_collect_sync+0x5ca/0x19d0 [iwlwifi]
[10060.098938]  ? __switch_to+0x80/0x470
[10060.098938]  ? _raw_spin_lock_irqsave+0x26/0x50
[10060.098938]  iwl_fw_error_dump_wk+0x53/0x80 [iwlwifi]
[10060.098938]  process_one_work+0x1e2/0x3b0
[10060.098939]  worker_thread+0x4a/0x3d0
[10060.098939]  kthread+0xfb/0x130
[10060.098939]  ? process_one_work+0x3b0/0x3b0
[10060.098939]  ? kthread_park+0x90/0x90
[10060.098939]  ret_from_fork+0x35/0x40
[10072.864098] iwlwifi 0000:05:00.0: Failing on timeout while stopping DMA channel 8 [0xa5a5a5a2]
[10072.884652] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
[10072.998458] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
[10073.063598] iwlwifi 0000:05:00.0: FW already configured (0) - re-configuring
[10073.078850] iwlwifi 0000:05:00.0: BIOS contains WGDS but no WRDS

In the other forum thread mentioned above, their wlan just stopped working and they could fix it by disabling and reenabling it. In my case, it locks up the whole system for a few seconds, but kills and restarts the wlan by itself.

Also, the frequency seems to depend not on time, but on the amount of data flowing through the wlan connection.

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#2 2020-01-07 18:31:39

jandyp
Member
Registered: 2020-01-07
Posts: 2

Re: iwlwifi periodically causes hard lockup on CPU

What's much worse though, is that after some of those hard lockups (like the one I experienced just a few minutes ago), the computer no longer reacts to input on USB ports. Since my motherboard has no PS/2 ports, that leaves me with a system that is no longer frozen, but which I can no longer interact with, except by pressing the power-button.

I'd post the dmesg for that here, but because I was forced to force-reboot, anything dmesg might have known is gone. I'd have to run something that continually writes the output of dmesg into a file and "hope" the USB-ignoring issue happens again.

Last edited by jandyp (2020-01-07 18:37:32)

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