[i915] System freezes with kernel 5.8, but not 5.4

[FlipDeFisch]

My system freezes when I'm in lockscreen. This happens every few hours after I leave the computer running some low to mediocre computation tasks, no memory problems. It does not happen when I run heavy tasks. I can only hard reboot, nothing else is working.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.8.0-38.43~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-38-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Jan 25 11:26:10 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GpuHangFrequency: Several times a week
GpuHangReproducibility: Occurs more often under certain circumstances
GpuHangStarted: Immediately after installing this version of Ubuntu
GraphicsCard:
 Intel Corporation HD Graphics 620 [8086:5916] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Lenovo HD Graphics 620 [17aa:2245]
InstallationDate: Installed on 2020-06-02 (236 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: LENOVO 20HD0001MZ
ProcEnviron:
 LANGUAGE=de_CH:de
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_CH.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-38-generic root=UUID=df6eb87b-cd89-4867-9c7c-de8b08bbdbcf ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/22/2020
dmi.bios.release: 1.63
dmi.bios.vendor: LENOVO
dmi.bios.version: N1QET88W (1.63 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HD0001MZ
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.35
dmi.modalias: dmi:bvnLENOVO:bvrN1QET88W(1.63):bd04/22/2020:br1.63:efr1.35:svnLENOVO:pn20HD0001MZ:pvrThinkPadT470:rvnLENOVO:rn20HD0001MZ:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470
dmi.product.name: 20HD0001MZ
dmi.product.sku: LENOVO_MT_20HD_BU_Think_FM_ThinkPad T470
dmi.product.version: ThinkPad T470
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.2.6-0ubuntu0.20.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

1. Please check that you haven't enabled any additional GNOME extensions in the 'Extensions' app. There should only be the three built-in ones. If you have more than that then try uninstalling or disabling them.

2. Next time you have to "hard reboot", please then run this command in a Terminal window:

   journalctl -b-1 > prevboot.txt

   and attach the resulting text file here.

3. Please also check for any recent crashes using these instructions: https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment

[FlipDeFisch (philsinn)]

Thank you for the fast reply!

1. There are only the three built-in extensions.
2. See the attached file "prevboot.txt". There you can find three "-- Reboot --". Only the first and the third are "hard reboots" because of the mentioned bug.
3. There are no crash reports connected to this problem.

Hope this helps.

[Daniel van Vugt (vanvugt)]

Thanks. Next please try an older kernel series like:

  https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4.92/

Because I've seen a few hints that the new 5.8 kernel in focal might be causing problems for Intel graphics...

[FlipDeFisch (philsinn)]

Good morning. Yes, this does not happen with 5.4.92. I reproduced the exact same situation that always made my system freeze with the 5.8 kernel. It has been running the whole night now and it did not freeze with 5.4.92.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.