https://lists.ubuntu.com/archives/kernel-team/2019-August/103419.html Eoan
https://lists.ubuntu.com/archives/kernel-team/2019-August/103421.html
linux-oem-osp1/bionic
** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
** Description changed:
+ 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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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1840236
Title:
Horizontal corrupted line at top of screen caused by framebuffer
compression
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