This still WIP -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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: New 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) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1840236/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
