Public bug reported: Sreen divided into half after installing Focal 5.4.0-48-generic under Power Saving/Hybrid Graphics Mode. Normal as switched to Discrete Graphics Mode. Screenshot attached as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1897501/+attachment/5414860/+files/20200928_135412.jpg .
With some more investigatin, https://git.launchpad.net/~ubuntu- kernel/ubuntu/+source/linux/+git/focal/commit/?id=d246a6cfe782 ("UBUNTU: SAUCE: drm/i915: Disable PSR by default on all platforms") for bug 1849947 is the root cause. It seems this panel must have PSR enabled. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-48-generic 5.4.0-48.52 ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60 Uname: Linux 5.4.0-48-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.9 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: gdm 964 F.... pulseaudio CasperMD5CheckResult: skip Date: Mon Sep 28 01:50:54 2020 InstallationDate: Installed on 2020-09-22 (5 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200218) MachineType: HP HP ZBook Studio G7 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-48-generic root=UUID=ac48cfe8-5fa7-410c-ad1b-53d1e2683841 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.4.0-48-generic N/A linux-backports-modules-5.4.0-48-generic N/A linux-firmware 1.187.3 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/18/2020 dmi.bios.vendor: HP dmi.bios.version: S91 Ver. 85.28.01 dmi.board.name: 8736 dmi.board.vendor: HP dmi.board.version: KBC Version 14.32.03 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrS91Ver.85.28.01:bd09/18/2020:svnHP:pnHPZBookStudioG7:pvr:rvnHP:rn8736:rvrKBCVersion14.32.03:cvnHP:ct10:cvr: dmi.product.family: 103C_5336AN HP ZBook dmi.product.name: HP ZBook Studio G7 dmi.sys.vendor: HP ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug focal oem-priority originate-from-1896602 stella ** Tags added: oem-priority originate-from-1896602 stella -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1897501 Title: HP Zbook Studio G7 boots into corrupted screen with PSR featured panel To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1897501/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
