[Bug 2037015] [NEW] Screen corruption of webkit2gtk apps in X11 on Raspberry Pi, such as during install

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Daniel van Vugt (vanvugt):

[ Impact ]

Screen corruption of webkit2gtk apps in X11 on Raspberry Pi, such as
during install.

[ Test Plan ]

1. Log into a Xorg session on a Raspberry Pi 4/400.

2. Open the default Help app by clicking the question mark icon in the
dock or by running 'yelp'.

3. Verify it didn't crash and the window contents are not corrupt.

[ Where problems could occur ]

The fix is limited to webkit2gtk so can only affect apps such as yelp or
the Raspberry Pi installer.

[ Other Info ]

During the initial configuration of the Ubuntu Desktop for Raspberry Pi
(the oem-config process, derived from ubiquity), on the Mantic beta
images, after the various pages of information have been filled out and
the process moves onto configuration, the "slide deck" that is usually
displayed during the process appeared corrupted as if a horizontal
stride were incorrectly set somewhere.

I'm attached a photo of the screen (as, while I could take a screenshot
during the process, it evidently wasn't saved somewhere persistent).

I originally thought this might be a regression of LP: #1924251 as the
corruption in the window looks very similar (incorrect horizontal stride
causing "banding"), but I tested the embedded browser (via the help
system) after completing setup and it worked perfectly so that's
*probably* unrelated.

** Affects: webkit
     Importance: Medium
         Status: Confirmed

** Affects: mesa (Ubuntu)
     Importance: Undecided
     Assignee: Daniel van Vugt (vanvugt)
         Status: Won't Fix

** Affects: webkit2gtk (Ubuntu)
     Importance: Medium
     Assignee: Daniel van Vugt (vanvugt)
         Status: Fix Released

** Affects: mesa (Ubuntu Noble)
     Importance: Undecided
         Status: Won't Fix

** Affects: webkit2gtk (Ubuntu Noble)
     Importance: Medium
     Assignee: Daniel van Vugt (vanvugt)
         Status: In Progress

** Affects: mesa (Ubuntu Oracular)
     Importance: Undecided
     Assignee: Daniel van Vugt (vanvugt)
         Status: Won't Fix

** Affects: webkit2gtk (Ubuntu Oracular)
     Importance: Medium
     Assignee: Daniel van Vugt (vanvugt)
         Status: Fix Released


** Tags: foundations-todo iso-testing noble raspi raspi-image raspigfx
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Screen corruption of webkit2gtk apps in X11 on Raspberry Pi, such as during install
https://bugs.launchpad.net/bugs/2037015
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