Public bug reported:
Following a kernel update on Kubuntu 18.04 from 5.0 to the latest hwe
version 5.3.0, the system started "freezing" after a few days of
operation (with the system being in suspend mode during most of each
day). With kernel 5.0 there was no such problem, even after many months
of operation (again with suspend/resume instead of shutting down). This
has happened each time I use the 5.3 kernel (4-5 times so far).
The actual behaviour is that the video froze, apart from the mouse
cursor that was moving normally but (seemingly) not activating anything.
To reboot gracefully, I tested Ctrl-Alt+F[1-3] to try to enable a
console (did not show a console), followed by Ctrl-Alt-Del, but it did
not work. There seemed to be some disk activity indicated by the LEDs.
To reboot the system, I used the SysRq sequence and the filesystem was
synced and the system was rebooted.
Additionally, there are some video glitches from time to time, but I
cannot find a usage pattern that produces them.
Attached is a dump from syslog showing something that seems like memory
leaks from the GPU.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.3.0-40-generic 5.3.0-40.32~18.04.1
ProcVersionSignature: Ubuntu 5.3.0-40.32~18.04.1-generic 5.3.18
Uname: Linux 5.3.0-40-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.11
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Feb 19 20:10:39 2020
InstallationDate: Installed on 2019-02-24 (360 days ago)
InstallationMedia: Kubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64
(20190210)
SourcePackage: linux-signed-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-hwe (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
** Attachment added: "Syslog dump"
https://bugs.launchpad.net/bugs/1863934/+attachment/5329544/+files/crash_log_ttm.txt
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https://bugs.launchpad.net/bugs/1863934
Title:
System/video freeze on AMD GPU using 5.3.0 kernel
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