Public bug reported: Ubuntu 20.10 uname -r: 5.8.0-50-generic Machine: Lenovo T440s
1) The graphical environment starts flickering, drawing the windows and their content scrambled, flashing, etc. Over the time the graphical environment disintegrates completely (scrambled windows, horizontal lines and solid squares all over the screen, impossible to use any controls or even to understand where they are), rendering any further work impossible (the only remedy is to reboot the system). At the onset of those symptoms dmesg or the like do not contain anything informative; however, usually the graphical environment also at some point freezes for a moment. When this happens, the dmesg gets appended with lines informing about a gpu hang: [28620.924309] i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:dfdef4fe, in Renderer [104270] [28620.924474] i915 0000:00:02.0: [drm] Resetting chip for stopped heartbeat on rcs0 [28621.027257] i915 0000:00:02.0: [drm] Renderer[104270] context reset due to GPU hang [28654.972181] i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:00200000, in Renderer [104270] [28654.973039] i915 0000:00:02.0: [drm] Resetting chip for stopped heartbeat on rcs0 [28655.075025] i915 0000:00:02.0: [drm] Renderer[104270] context reset due to GPU hang This is the probably the only possibly relevant info I could find in the logs. 2) Reproducing: no specific steps are known. I noticed that using Firefox usually speeds up the onset of the problems, but the bug presents itself also when using other programs (e.g., Wolfram Mathematica). 3) The bug started to manifest itself since updating to the kernel 5.8.0-49 via apt upgrade. Most tellingly, booting with 5.8.0-48 leads to stable, working system without any of the described problems. 4) The only recent relevant report I could find seems to be this one: https://gitlab.freedesktop.org/drm/intel/-/issues/2986 ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: linux-image-5.8.0-50-generic 5.8.0-50.56 ProcVersionSignature: Ubuntu 5.8.0-50.56-generic 5.8.18 Uname: Linux 5.8.0-50-generic x86_64 ApportVersion: 2.20.11-0ubuntu50.5 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D10p', '/dev/snd/pcmC0D9p', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperMD5CheckResult: skip Date: Thu Apr 22 09:31:48 2021 InstallationDate: Installed on 2015-03-18 (2226 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: LENOVO 20ARS45900 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-50-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash elevator=noop vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.8.0-50-generic N/A linux-backports-modules-5.8.0-50-generic N/A linux-firmware 1.190.3 SourcePackage: linux UpgradeStatus: Upgraded to groovy on 2020-10-23 (180 days ago) dmi.bios.date: 01/09/2015 dmi.bios.release: 2.32 dmi.bios.vendor: LENOVO dmi.bios.version: GJET82WW (2.32 ) dmi.board.asset.tag: Not Available dmi.board.name: 20ARS45900 dmi.board.vendor: LENOVO dmi.board.version: SDK0E50512 STD dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.ec.firmware.release: 1.9 dmi.modalias: dmi:bvnLENOVO:bvrGJET82WW(2.32):bd01/09/2015:br2.32:efr1.9:svnLENOVO:pn20ARS45900:pvrThinkPadT440s:rvnLENOVO:rn20ARS45900:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad T440s dmi.product.name: 20ARS45900 dmi.product.sku: LENOVO_MT_20AR_BU_Think_FM_ThinkPad T440s dmi.product.version: ThinkPad T440s dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug groovy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1925429 Title: Flickering of the graphical environment (i915 [drm] GPU HANG) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1925429/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
