Bug#1127370: trixie-pu: package gnome-shell/48.7-0+deb13u2

[Simon McVittie]

Package: release.debian.org
Severity: normal
Tags: trixie
X-Debbugs-Cc: gnome-shell at packages.debian.org
Control: affects -1 + src:gnome-shell
User: release.debian.org at packages.debian.org
Usertags: pu

[ Reason ]
Fix blank screen after GNOME login on some AMD GPUs

[ Impact ]
Some users reported a black screen after logging in to GNOME from GDM
(#1125275, #1125941, #1126174) or a brief flash of a black screen 
followed by normal operation (#1125273) after the Debian 13.3 update, 
especially if using an AMD GPU and/or an external display. This seems to 
have been caused by an upstream change that was only intended for 50.x 
but was mistakenly cherry-picked to 49.x and 48.x, and is resolved in 
this version by reverting that change.

(Not all configurations with an AMD GPU and an external display had this 
problem - I have a system with that setup and it was unaffected.)

[ Tests ]
A functionally equivalent version (differing only in the changelog and 
patch header) is available from 
<https://people.debian.org/~smcv/temp/2026/bug1125941/revert/>, and the 
reporters of #1125275, #1125941 and #1125273 confirmed that it solves 
the problem. I've also been using this version on one of my trixie 
systems for a while with no problems (although note that I wasn't 
affected by the regression).

[ Risks ]
This is a narrowly targeted change that has been through upstream review.

[ Checklist ]
  [x] *all* changes are documented in the d/changelog
  [x] I reviewed all changes and I approve them
  [x] attach debdiff against the package in (old)stable
  [x] the issue is verified as fixed in unstable (since 49.3-1)

[ Changes ]
All changes are part of the regression fix.
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