This bug was fixed in the package mesa - 21.0.3-0ubuntu0.2~20.04.1
---------------
mesa (21.0.3-0ubuntu0.2~20.04.1) focal; urgency=medium
* Backport to focal. (LP: #1925320)
* control, rules: Use gcc10 on ppc64el to fix the build.
mesa (21.0.3-0ubuntu0.2) hirsute; urgency=medium
* amd-add-missing-line-from-backport.diff: Fix a regression with
radeonsi caused by a bad backport. (LP: #1934783)
-- Timo Aaltonen <tjaal...@debian.org> Tue, 25 May 2021 09:51:53 +0300
** Changed in: mesa (Ubuntu Focal)
Status: Fix Committed => Fix Released
--
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Touch seeded packages, which is subscribed to mesa in Ubuntu.
https://bugs.launchpad.net/bugs/1934783
Title:
Graphical glitches with Mesa 21.0.3 on AMD Radeon RX 5600 XT
Status in mesa package in Ubuntu:
Fix Released
Status in mesa source package in Focal:
Fix Released
Status in mesa source package in Hirsute:
Fix Released
Bug description:
[Impact]
The new upstream version 21.0.3 has a regression on radeonsi (amdgpu), which
shows as graphical corruption on the desktop apps with certain hardware.
The fix is to add a commit from upstream staging/21.0 -branch, which
never got released as 21.0.4.
[Test case]
Install the update, use desktop apps, see that it works correctly now.
[Where things could go wrong]
The fix adds a single line for an earlier commit that was incomplete. In
theory it might regress some other amd hw, but this is highly unlikely.
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Since the update to Mesa 21.0.3 I have graphical glitches in desktop:
Unity, Gnome Shell both sessions (X.org and Wayland).
Also most of the programs have glitches. However Firefox seems
unaffected.
CPU:
Info: 6-Core AMD Ryzen 5 3600 [MT MCP] speed: 3916 MHz
min/max: 2200/3600 MHz
Graphics:
Device-1: AMD Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT]
driver: amdgpu v: kernel
Display: x11 server: X.Org 1.20.11 driver: loaded: amdgpu,ati
unloaded: fbdev,modesetting,radeon,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: AMD Radeon RX 5600 XT (NAVI10 DRM 3.35.0
5.4.0-79-generic LLVM 12.0.0)
v: 4.6 Mesa 21.0.3
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