** Changed in: linux-oem-5.13 (Ubuntu Focal)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1936708
Title:
Wobbly graphics on built-in display since linux-
image-5.11.0-22-generic
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-5.13 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Won't Fix
Status in linux-oem-5.13 source package in Focal:
Fix Committed
Status in linux source package in Hirsute:
Confirmed
Status in linux-oem-5.13 source package in Hirsute:
Invalid
Status in linux source package in Impish:
Confirmed
Status in linux-oem-5.13 source package in Impish:
Invalid
Bug description:
== SRU Justification ==
[Impact]
Wobbly graphics after a kernel update.
[Fix]
Older panels may require more bandwidth then advertised, so we need to
use max params for them.
[Test]
Multiple users tested with positive result.
[Where problems could occur]
This patch reverts to the old behavior, which is to use max parameters,
for older panels. If there's any new panel reports with older DP
version, this might change the behavior on it.
== Original Bug Report ==
Lenovo laptop with Intel + Nvidia graphics.
Since booting from linux-image-5.11.0-22-generic, the built-in display is
unusable, with wobbling horizontal stripes from the disk decryption prompt
onwards:
https://www.youtube.com/watch?v=LyRTuPzCe2I
HDMI output works fine.
If I boot from linux-image-5.11.0-18-generic instead, all is well.
If I use Recovery mode with linux-image-5.11.0-22-generic and continue
bootup, it's usable but there's no HDMI output.
I think others may be having this issue too:
https://askubuntu.com/questions/1351188/weird-graphical-glitches-appears-only-on-integrated-display-on-any-ubuntu-base#
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: linux-image-5.11.0-22-generic 5.11.0-22.23
ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21
Uname: Linux 5.11.0-22-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: alex 1598 F.... pulseaudio
/dev/snd/controlC0: alex 1598 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat Jul 17 09:50:31 2021
InstallationDate: Installed on 2021-01-03 (194 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
MachineType: LENOVO 80DU
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.11.0-22-generic
root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.11.0-22-generic N/A
linux-backports-modules-5.11.0-22-generic N/A
linux-firmware 1.197.2
SourcePackage: linux
UpgradeStatus: Upgraded to hirsute on 2021-05-22 (55 days ago)
dmi.bios.date: 08/18/2014
dmi.bios.release: 1.49
dmi.bios.vendor: LENOVO
dmi.bios.version: 9ECN31WW(V1.14)
dmi.board.asset.tag: 31900058WIN
dmi.board.name: Lenovo Y70-70 Touch
dmi.board.vendor: LENOVO
dmi.board.version: 31900058WIN
dmi.chassis.asset.tag: 31900058WIN
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Y70-70 Touch
dmi.ec.firmware.release: 1.49
dmi.modalias:
dmi:bvnLENOVO:bvr9ECN31WW(V1.14):bd08/18/2014:br1.49:efr1.49:svnLENOVO:pn80DU:pvrLenovoY70-70Touch:rvnLENOVO:rnLenovoY70-70Touch:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoY70-70Touch:
dmi.product.family: IDEAPAD
dmi.product.name: 80DU
dmi.product.sku: LENOVO_MT_80DU_BU_idea_FM_Lenovo Y70-70 Touch
dmi.product.version: Lenovo Y70-70 Touch
dmi.sys.vendor: LENOVO
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