[Dell XPS 13 9340] [i915] After recent update, screen is corrupted level with mouse pointer

Thanks for the bug report. Please add kernel parameter i915.enable_psr=0 to avoid such problems. You can do so in /etc/default/grub by changing:

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0"

Then run:

  sudo update-grub

and reboot.

Status changed to 'Confirmed' because the bug affects multiple users.

Many thanks for the quick reply --- that worked fine :-)

On Wed, Jul 17, 2024 at 2:45 AM Daniel van Vugt <email address hidden>
wrote:

> Thanks for the bug report. Please add kernel parameter i915.enable_psr=0
> to avoid such problems. You can do so in /etc/default/grub by changing:
>
> GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
>
> to
>
> GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0"
>
> Then run:
>
> sudo update-grub
>
> and reboot.
>
>
> ** Tags added: psr
>
> ** Package changed: xorg (Ubuntu) => linux (Ubuntu)
>
> ** Tags added: i915
>
> ** Tags added: regression-update
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2073252
>
> Title:
> After recent update, screen is corrupted level with mouse pointer
>
> Status in linux package in Ubuntu:
> New
>
> Bug description:
> I accepted a "restart to install changes" request box yesterday, and
> my screen immediately started to show corruption on the scan lines
> which the mouse pointer has recently been on.
>
> The corruption only happens on the built-in laptop display; external
> monitors are not affected.
>
> I have tried a reboot, and an "apt-get update; apt-get dist-upgrade"
> followed by a reboot, and neither of these had any effect.
>
> The machine is a Dell XPS13, running Ubuntu 24.04 LTS.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 24.04
> Package: xorg 1:7.7+23ubuntu3
> ProcVersionSignature: Ubuntu 6.8.0-38.38-generic 6.8.8
> Uname: Linux 6.8.0-38-generic x86_64
> ApportVersion: 2.28.1-0ubuntu3
> Architecture: amd64
> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
> CasperMD5CheckResult: pass
> CompositorRunning: None
> CurrentDesktop: ubuntu:GNOME
> Date: Tue Jul 16 11:32:58 2024
> DistUpgraded: Fresh install
> DistroCodename: noble
> DistroVariant: ubuntu
> ExtraDebuggingInterest: Yes, if not too technical
> GraphicsCard:
> Intel Corporation Meteor Lake-P [Intel Arc Graphics] [8086:7d55] (rev
> 08) (prog-if 00 [VGA controller])
> Subsystem: Dell Meteor Lake-P [Intel Arc Graphics] [1028:0c87]
> InstallationDate: Installed on 2024-06-05 (41 days ago)
> InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64
> (20240424)
> MachineType: Dell Inc. XPS 13 9340
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-38-generic
> root=UUID=c4cafc00-a3d5-4488-ab4b-857fcff24446 ro quiet splash vt.handoff=7
> SourcePackage: xorg
> Symptom: display
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 04/12/2024
> dmi.bios.release: 1.5
> dmi.bios.vendor: Dell Inc.
> dmi.bios.version: 1.5.0
> dmi.board.name: 0CH5X9
> dmi.board.vendor: Dell Inc.
> dmi.board.version: A00
> dmi.chassis.type: 10
> dmi.chassis.vendor: Dell Inc.
> dmi.ec.firmware.release: 1.8
> dmi.modalias:
> dmi:bvnDellInc.:bvr1.5.0:bd04/12/2024:br1.5:efr1.8:svnDellInc.:pnXPS139340:pvr:rvnDellInc.:rn0CH5X9:rvrA00:cvnDellInc.:ct10:cvr:sku0C87:
> dmi.product.family: XPS
> dmi.product.name: XPS 13 9340
> dmi.product.sku: 0C87
> dmi.sys.vendor: Dell Inc.
> version.compiz: co...

@John,

Could you try mainline kernel to check if it's reproduced:
https://kernel.ubuntu.com/mainline/v6.10-rc4/

I think it's a regression from commit:
1d395ab43e6bf drm/i915/display: Increase number of fast wake precharge pulses
e6b076d508d48 drm/i915/psr: Calculate IO wake and fast wake lines for DISPLAY_VER < 12
307476565ef6e drm/i915/psr: Improve fast and IO wake lines calculation

If mainline kernel can reproduce it, we should let Intel know.

Hi @AaronMa and @John,

This bug is related to the bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2069993,
and we had some quirk fixing on these panels:

Panels show garbage or flickering when i915.psr2 enabled (LP: #2069993)
    - SAUCE: drm/i915/display/psr: add a psr2 disable quirk table
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x4d_0x10_0x93_0x15
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x30_0xe4_0x8b_0x07
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x30_0xe4_0x78_0x07
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x30_0xe4_0x8c_0x07
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x06_0xaf_0x9a_0xf9
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x4d_0x10_0x8f_0x15
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x06_0xaf_0xa3_0xc3

So for this bug here, we would like to add a quirk on user's panel (the exact same way as we've done before).

@John, please follow the instruction below to give us the information of your panel used by Dell XPS 13 9340:

1. Install the needed package:
```
sudo apt install edid-decode
```
2. Get EDID of your running panel:
```
sudo get-edid | edid-decode
```

Please paste or attach the whole output from edid-decode, thanks.

Hi @Aaron,

We're communicating with Intel to have some fixes on certain panels, the upstream bug is here: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/9739.

Intel has a progress that they have added a quirk on a specific panel (to be more precise, a laptop model): https://patchwork.freedesktop.org/series/135777/. I'm sure they're going to fix more panels in the future.

But for oem-6.8, we may still use Ubuntu's local patch/quirk.