Verified focal-proposed 5.6.0-1022-oem and 5.6.0-1023-oem. ** Tags removed: verification-needed-focal ** Tags added: verification-done-focal
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.6 in Ubuntu. https://bugs.launchpad.net/bugs/1891451 Title: Add TGL+ SAGV display support Status in HWE Next: New Status in linux package in Ubuntu: Incomplete Status in linux-oem-5.6 package in Ubuntu: Invalid Status in linux source package in Focal: Invalid Status in linux-oem-5.6 source package in Focal: Fix Committed Status in linux source package in Groovy: Incomplete Status in linux-oem-5.6 source package in Groovy: Invalid Bug description: [SRU Justification] [Impact] On platforms with UHD panel, massive drawing area updates may cause screen to flash as half-baked render buffers with black areas being renedered. [Fix] This turns out to be the lack of full support to Intel System Agent Geyserville (SAGV), which has been landed to kernel v5.8. The required fix resides in https://patchwork.freedesktop.org/series/75129/, which seems a rolling set that its early parts have been committed separatedly several times. This patchset also depends on https://patchwork.freedesktop.org/series/72301/, which attempts to make global state handling more standardized. [Test Case] 1. Trigger massive rect updates, e.g. cat a lengthy file in xterm, dump kernel git history, etc. 2. Observe if screen flashes with half black panes, sometimes black stripes, etc. [Regression Potential] Medium. This is to backport a new feature landed to kernel early this year, even there is no later fixes patch found so far, it could still introduce incompatibility to older kernels. So far it behaves on both UHD and other lower resolutions. ========== Original Bug Description ========== On platforms with UHD panel, massive drawing area updates may cause screen to flash as half-baked render buffers with black areas being renedered. [Reproduce Steps] 1. boot to GUI 2. generate massive screen updates by `while true; do dmesg; done` or so [Results] Expected Result: Text output correctly rendered on xterm smoothly Actual Result: Screen flashes with black strides, etc. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: u 1855 F.... pulseaudio CasperMD5CheckResult: skip DistributionChannelDescriptor: # This is the distribution channel descriptor for the OEM CDs # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-focal-amd64-20200502-85+fossa-bulbasaur+X35 DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-08-07 (6 days ago) InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20200502-05:58 IwConfig: lo no wireless extensions. enx00e04c6801fa no wireless extensions. MachineType: Dell Inc. XPS 13 9310 Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1020-oem root=UUID=00ec17d2-a1e3-4363-a67b-a7c380cc9189 ro drm.debug=0x1ff log_buf_len=32M ProcVersionSignature: Ubuntu 5.6.0-1020.20-oem 5.6.19 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.6.0-1020-oem N/A linux-backports-modules-5.6.0-1020-oem N/A linux-firmware 1.187.2 RfKill: Tags: focal Uname: Linux 5.6.0-1020-oem x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True dmi.bios.date: 07/30/2020 dmi.bios.vendor: Dell Inc. dmi.bios.version: 0.2.9 dmi.board.vendor: Dell Inc. dmi.chassis.asset.tag: 202007-28063 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr0.2.9:bd07/30/2020:svnDellInc.:pnXPS139310:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9310 dmi.product.sku: 0991 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1891451/+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
