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

[Sebastien Bacher]

I've uploaded the noble SRU now

** Changed in: webkit2gtk (Ubuntu Noble)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/2037015

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

Status in Webkit:
  Confirmed
Status in mesa package in Ubuntu:
  Won't Fix
Status in webkit2gtk package in Ubuntu:
  Fix Released
Status in mesa source package in Noble:
  Won't Fix
Status in webkit2gtk source package in Noble:
  Fix Committed
Status in mesa source package in Oracular:
  Won't Fix
Status in webkit2gtk source package in Oracular:
  Fix Released

Bug description:
  [ 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.

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