after bisection:
6d7a793aabf31d7ba2b16fc13a94ccf0b90e4be0 is the first bad commit
commit 6d7a793aabf31d7ba2b16fc13a94ccf0b90e4be0
Author: José Roberto de Souza <[email protected]>
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 <[email protected]>
Cc: Radhakrishna Sripada <[email protected]>
Reported-by: Ville Syrjälä <[email protected]>
Fixes: 78b772e1a01f ("drm/i915/display: Fill PSR state during hardware
configuration read out")
Signed-off-by: José Roberto de Souza <[email protected]>
Reviewed-by: Gwan-gyeong Mun <[email protected]>
Link:
https://patchwork.freedesktop.org/patch/msgid/[email protected]
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
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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.
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