Just had a system hang on 18.04 due to this. The hangs are definitely much rarer, but do happen.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1728651 Title: System hangs after iwlwifi firmware crash Status in linux-firmware package in Ubuntu: Confirmed Bug description: Since upgrading to Kubuntu 17.10 my HP EliteBook 820 G3 hangs at unpredictable times. I have experienced probably 20 hangs. Once the system is hung no mouse movement, NumLock toggle, VT switch, Ctrl+Alt+Del, SysRq keys, SSH attempts have any effect whatsoever. Any audio playing is stuck looping in the hardware buffer. The system is really stuck. Only the keyboard backlight is still responsive. The only correlation I have noticed is that the system only hangs if WiFi is enabled. This morning I experienced two hangs in ten minutes necessitating reboots. Having disabled WiFi the system has been stable since ~1100 (~5 hours). Often, I see a iwlwifi hardware reset in the logs before the system dies: /var/log/syslog:Oct 30 11:49:30 fry kernel: [ 6529.550751] iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x82000000. (apport has hopefully uploaded the full log, please lmk if not). Sometimes the message doesn't make it into the logs, and ext4 truncates the file at the next mount. There seems to be no correlation with any messages immediately before the wifi chip dies. It doesn't seem to matter whether I'm at home or at work. I have wired ethernet at work simultaneously with wifi, but the wifi provides IPv6 so I would imagine most traffic uses wifi, so it's hard to say whether there's any effect of the traffic load on the probability of failure. Here is a sample of the firmware load: /var/log/syslog.5.gz:Oct 24 15:37:26 fry kernel: [ 7.604743] iwlwifi 0000:02:00.0: enabling device (0000 -> 0002) /var/log/syslog.5.gz:Oct 24 15:37:26 fry kernel: [ 7.611790] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-8000C-33.ucode failed with error -2 /var/log/syslog.5.gz:Oct 24 15:37:26 fry kernel: [ 7.611930] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-8000C-32.ucode failed with error -2 /var/log/syslog.5.gz:Oct 24 15:37:26 fry kernel: [ 7.620028] iwlwifi 0000:02:00.0: loaded firmware version 31.532993.0 op_mode iwlmvm /var/log/syslog.5.gz:Oct 24 15:37:26 fry kernel: [ 7.650972] iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208 02:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a) Any help appreciated. Thanks, Bruce ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: xorg 1:7.7+19ubuntu3 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.1 Architecture: amd64 CompositorRunning: None CurrentDesktop: KDE Date: Mon Oct 30 16:15:43 2017 DistUpgraded: 2017-10-15 14:47:25,517 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: artful DistroVariant: kubuntu GraphicsCard: Intel Corporation HD Graphics 520 [8086:1916] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company HD Graphics 520 [103c:807c] InstallationDate: Installed on 2016-09-09 (416 days ago) InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: HP HP EliteBook 820 G3 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-16-generic.efi.signed root=/dev/mapper/kubuntu--vg-root ro SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to artful on 2017-10-15 (15 days ago) dmi.bios.date: 11/01/2016 dmi.bios.vendor: HP dmi.bios.version: N75 Ver. 01.13 dmi.board.name: 807C dmi.board.vendor: HP dmi.board.version: KBC Version 85.74 dmi.chassis.asset.tag: 5CG6354JW5 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrN75Ver.01.13:bd11/01/2016:svnHP:pnHPEliteBook820G3:pvr:rvnHP:rn807C:rvrKBCVersion85.74:cvnHP:ct10:cvr: dmi.product.family: 103C_5336AN G=N L=BUS B=HP S=ELI dmi.product.name: HP EliteBook 820 G3 dmi.sys.vendor: HP version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.83-1 version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.2-0ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.2-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1728651/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp