Le 03/07/2026 à 18:25, Boyan Penkov a écrit :
[...]
The issue presents itself on both libgallium 25 from Trixie and
libgallium 26 from testing.
Have you tried libgallium 25 from Trixie-backports? I have observed that
sometimes when you use a backports kernel you need adequate backported
libraries.
From the modification journal of mesa-libgallium (trixie-backports):
"[...]
* Lower libdrm-dev to 2.4.124-1 to match the version in Trixie
[...]"
which suggests that mesa-libgallium from Testing is likely to create
problems in Trixie.
I would advise you against performing dist-upgrades of a stable Debian
distro: dist-upgrades are meant only for major version upgrades, and
even then, they are meant to take place only after an ordinary upgrade.
Possibly you could also assert if you need at all backports and
fasttrack repos for other purposes, because your hardware being not the
latest (at least the graphic card), it does not seem to need that. And
the reliablity of a Stable Debian is greater than that of a
Stable+backports(+fasttrack) one
