after bisection: 6d7a793aabf31d7ba2b16fc13a94ccf0b90e4be0 is the first bad commit commit 6d7a793aabf31d7ba2b16fc13a94ccf0b90e4be0 Author: José Roberto de Souza <jose.so...@intel.com> Date: Fri May 14 16:22:45 2021 -0700
drm/i915/display: Allow fastsets when DP_SDP_VSC infoframe do not match with PSR enabled When PSR is enabled it handles DP_SDP_VSC, changing revision and all the other fields as necessary. It can also enabled and disable this SDP as needed without a full modeset. So here masking DP_SDP_VSC bit when previous and future state PSR enabled, it will still be checked when comparing the asked state to what was programmed to hardware. Cc: Gwan-gyeong Mun <gwan-gyeong....@intel.com> Cc: Radhakrishna Sripada <radhakrishna.srip...@intel.com> Reported-by: Ville Syrjälä <ville.syrj...@linux.intel.com> Fixes: 78b772e1a01f ("drm/i915/display: Fill PSR state during hardware configuration read out") Signed-off-by: José Roberto de Souza <jose.so...@intel.com> Reviewed-by: Gwan-gyeong Mun <gwan-gyeong....@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210514232247.144542-2-jose.so...@intel.com drivers/gpu/drm/i915/display/intel_display.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) ** Attachment added: "bisect log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958620/+attachment/5573585/+files/bisect -- 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/1958620 Title: [Dell XPS 15 9575] Flickering white/black screen once KMS comes up Status in linux package in Ubuntu: Confirmed Bug description: This looks like a regression from the 5.13.0-20-generic kernel to the 5.15.0-17-generic kernel. The display works fine under efifb, but as soon as the DRM drivers are loaded and KMS kicks in the display is replaced by black with flickering white (apparently when what would be on the output changes). ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-5.15.0-17-generic 5.15.0-17.17 ProcVersionSignature: Ubuntu 5.13.0-20.20-generic 5.13.14 Uname: Linux 5.13.0-20-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu75 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chris 7134 F.... pipewire-media- /dev/snd/seq: chris 7133 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Fri Jan 21 17:07:08 2022 InstallationDate: Installed on 2021-06-26 (208 days ago) InstallationMedia: Ubuntu 21.10.0 2021.05.28 amd64 "bcachefs" (20210622) MachineType: Dell Inc. XPS 15 9575 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.13.0-20-generic root=UUID=ff90803a-eedd-429b-bb78-b713f7c661d6 ro quiet splash PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.13.0-20-generic N/A linux-backports-modules-5.13.0-20-generic N/A linux-firmware 1.204 SourcePackage: linux UpgradeStatus: Upgraded to jammy on 2021-10-28 (84 days ago) dmi.bios.date: 07/07/2019 dmi.bios.release: 1.7 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.7.1 dmi.board.name: 0C32VW dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 31 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.7.1:bd07/07/2019:br1.7:svnDellInc.:pnXPS159575:pvr:sku080D:rvnDellInc.:rn0C32VW:rvrA00:cvnDellInc.:ct31:cvr: dmi.product.family: XPS dmi.product.name: XPS 15 9575 dmi.product.sku: 080D dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958620/+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