iwlwifi: Microcode SW error detected

[Mathieu Tarral]

Hi,

I just had an unresponsive Wifi connexion, and checking the dmesg logs gave me this:

[53468.634940] iwlwifi 0000:00:14.3: Queue 11 is active on fifo 1 and stuck for 10000 ms. SW [0, 15] HW [0, 15] FH TRB=0x0c010b000
[53468.635087] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[53468.635466] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[53468.635471] iwlwifi 0000:00:14.3: Status: 0x00000080, count: 6
[53468.635475] iwlwifi 0000:00:14.3: Loaded firmware version: 46.6bf1df06.0
[53468.635480] iwlwifi 0000:00:14.3: 0x00000084 | NMI_INTERRUPT_UNKNOWN
[53468.635484] iwlwifi 0000:00:14.3: 0x000022F0 | trm_hw_status0
[53468.635488] iwlwifi 0000:00:14.3: 0x00000000 | trm_hw_status1
[53468.635491] iwlwifi 0000:00:14.3: 0x004882DA | branchlink2
[53468.635495] iwlwifi 0000:00:14.3: 0x0047932A | interruptlink1
[53468.635498] iwlwifi 0000:00:14.3: 0x0047932A | interruptlink2

....

It looks like a iwlwifi firmware crash.

See the dmesg log attached.

Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-firmware 1.183.1
ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
Uname: Linux 5.3.0-19-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 13 02:54:38 2019
Dependencies:

InstallationDate: Installed on 2019-09-26 (47 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PackageArchitecture: all
SourcePackage: linux-firmware
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[MasterProg (masterprog)]

Also applies to Ubuntu 18.04 with the newest HWE kernel (5.3). This seems to be a regression in 5.3, 5.0 works fine.

[J. Snow (jon.snow)]

Same here. Ubuntu 19.10 with 5.3.0-26-generic kernel.

[90731.026595] iwlwifi 0000:04:00.0: Microcode SW error detected. Restarting 0x0.
[90731.026982] iwlwifi 0000:04:00.0: Start IWL Error Log Dump:
[90731.026984] iwlwifi 0000:04:00.0: Status: 0x00000080, count: 6
[90731.026986] iwlwifi 0000:04:00.0: Loaded firmware version: 46.6bf1df06.0
[90731.026988] iwlwifi 0000:04:00.0: 0x000022CE | ADVANCED_SYSASSERT
[90731.026989] iwlwifi 0000:04:00.0: 0x0590A2F3 | trm_hw_status0
[90731.026991] iwlwifi 0000:04:00.0: 0x00000000 | trm_hw_status1
[90731.026992] iwlwifi 0000:04:00.0: 0x0048853E | branchlink2
[90731.026993] iwlwifi 0000:04:00.0: 0x00479392 | interruptlink1
[90731.026994] iwlwifi 0000:04:00.0: 0x00000000 | interruptlink2
[90731.026996] iwlwifi 0000:04:00.0: 0x0000012C | data1
[90731.026997] iwlwifi 0000:04:00.0: 0x00000000 | data2
[90731.026998] iwlwifi 0000:04:00.0: 0x04000000 | data3
[90731.027000] iwlwifi 0000:04:00.0: 0x0FC189F2 | beacon time
[90731.027001] iwlwifi 0000:04:00.0: 0x2AFC5614 | tsf low
[90731.027002] iwlwifi 0000:04:00.0: 0x00000100 | tsf hi
[90731.027003] iwlwifi 0000:04:00.0: 0x00000000 | time gp1
[90731.027005] iwlwifi 0000:04:00.0: 0x13217A21 | time gp2
[90731.027006] iwlwifi 0000:04:00.0: 0x00000001 | uCode revision type
[90731.027007] iwlwifi 0000:04:00.0: 0x0000002E | uCode version major
[90731.027009] iwlwifi 0000:04:00.0: 0x6BF1DF06 | uCode version minor
[90731.027010] iwlwifi 0000:04:00.0: 0x00000321 | hw version
[90731.027011] iwlwifi 0000:04:00.0: 0x00C89004 | board version
[90731.027012] iwlwifi 0000:04:00.0: 0x0B5C001C | hcmd
[90731.027014] iwlwifi 0000:04:00.0: 0x27F93882 | isr0
[90731.027015] iwlwifi 0000:04:00.0: 0x00044000 | isr1
[90731.027016] iwlwifi 0000:04:00.0: 0x10081802 | isr2
[90731.027017] iwlwifi 0000:04:00.0: 0x4041FDC1 | isr3
[90731.027019] iwlwifi 0000:04:00.0: 0x00000000 | isr4
[90731.027020] iwlwifi 0000:04:00.0: 0x0B5B001C | last cmd Id
[90731.027021] iwlwifi 0000:04:00.0: 0x0001ACA2 | wait_event
[90731.027023] iwlwifi 0000:04:00.0: 0x00004288 | l2p_control
[90731.027024] iwlwifi 0000:04:00.0: 0x00001C20 | l2p_duration
[90731.027025] iwlwifi 0000:04:00.0: 0x000003BF | l2p_mhvalid
[90731.027026] iwlwifi 0000:04:00.0: 0x000000E7 | l2p_addr_match
[90731.027028] iwlwifi 0000:04:00.0: 0x0000000D | lmpm_pmg_sel
[90731.027029] iwlwifi 0000:04:00.0: 0x08081424 | timestamp
[90731.027030] iwlwifi 0000:04:00.0: 0x13683838 | flow_handler
[90731.027176] iwlwifi 0000:04:00.0: Start IWL Error Log Dump:
[90731.027178] iwlwifi 0000:04:00.0: Status: 0x00000080, count: 7
[90731.027179] iwlwifi 0000:04:00.0: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
[90731.027180] iwlwifi 0000:04:00.0: 0x00000000 | umac branchlink1
[90731.027182] iwlwifi 0000:04:00.0: 0xC008888E | umac branchlink2
[90731.027183] iwlwifi 0000:04:00.0: 0xC0084414 | umac interruptlink1
[90731.027184] iwlwifi 0000:04:00.0: 0xC0084414 | umac interruptlink2
[90731.027185] iwlwifi 0000:04:00.0: 0x00000800 | umac data1
[90731.027187] iwlwifi 0000:04:00.0: 0xC0084414 | umac data2
[90731.027188] iwlwifi 0000:04:00.0: 0xDEADBEEF | umac data3
[90731.027189] iwlwifi 0000:04:00.0: 0x0000002E | umac major
[90731.027190] iwlwifi 0000:04:00.0: 0x6BF1DF0...