Ubuntu 19.10 (Eoan Ermine) has reached end of life, so this bug will not
be fixed for that specific release.
** Changed in: linux-oem-osp1 (Ubuntu Eoan)
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/1840236
Title:
Horizontal corrupted line at top of screen caused by framebuffer
compression
Status in HWE Next:
Fix Released
Status in Linux:
Invalid
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-osp1 package in Ubuntu:
New
Status in linux source package in Bionic:
Invalid
Status in linux-oem-osp1 source package in Bionic:
Fix Released
Status in linux source package in Disco:
Invalid
Status in linux-oem-osp1 source package in Disco:
Fix Released
Status in linux source package in Eoan:
Fix Released
Status in linux-oem-osp1 source package in Eoan:
Won't Fix
Bug description:
SRU Justification:
[Impact]
On IceLake platforms there might be a thin, horizon strap of corruption
image at the top of screen randomly after some series of window
operations and disappears within a second or so. This is found on
multiple platforms and is quite annonying that results in bad user
experience.
[Fix]
The upstream bug has been filed for previous platforms, e.g. GeminiLake
for an year or so, still working in progress, and so far this only known
work-around is to turn off framebuffer compression on affected platforms.
[Test Case]
The most easy way is to observe if such corruption appears during the
transition from GDM to gnome-shell.
[Regression Risk]
Low. The work-around for GeminiLake was landed to Linux stable 4.14.125
and has been backported to B/D.
======= Original Description ======
This is an follow-up for
https://bugs.freedesktop.org/show_bug.cgi?id-108085 but found on
IceLake platforms.
Right after GDM is login screen is rendered, there might be a thin
strap of corrupted image at top of the display for a short while. Like
f-d-o bug 108085, sometimes it can also be reproduced by clicking the
date/time repeatedly to open and close the calendar several times.
Etc.
Known work-around so far is to append kernel boot param
"i915.enable_fbc=0".
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.0.0-1018-oem-osp1 5.0.0-1018.20
ProcVersionSignature: Ubuntu 5.0.0-1018.20-oem-osp1 5.0.18
Uname: Linux 5.0.0-1018-oem-osp1 x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Aug 15 16:41:01 2019
DistributionChannelDescriptor:
# This is the distribution channel descriptor for the OEM CDs
# For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-bionic-amd64-20190418-59+beaver-osp1-loras+X14
InstallationDate: Installed on 2019-08-12 (3 days ago)
InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary
20190418-12:10
SourcePackage: linux-signed-oem-osp1
UpgradeStatus: No upgrade log present (probably fresh install)
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