** Changed in: mesa (Ubuntu)
Milestone: None => ubuntu-24.04.2
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https://bugs.launchpad.net/bugs/2082072
Title:
No support for Pi 2712D0 stepping
Status in mesa package in Ubuntu:
Fix Released
Status in mesa source package in Jammy:
Fix Released
Status in mesa source package in Noble:
Fix Released
Bug description:
[ Impact ]
Pi 5 owners with the D0 stepping will find the noble (24.04) desktop
doesn't work at all, including login. While oracular desktop users
have a sufficiently up to date mesa, all snaps relying on noble's mesa
(firefox, thunderbird, and the snap-store -- all seeded and thus
"essential" applications) do not work either on the D0 stepping.
[ Test Plan ]
Given the patches proposed only affect the v3d driver, which is only
used on the Pi 4 and Pi 5 hardware, the test plan can reasonably be
restricted to boards of this type.
* Flash a 24.04.1 Pi desktop image to a fresh card
* Boot card on a D0-stepping Pi 5 (e.g. 2GB board)
* Verify that mesa fails to even display the initial setup
* Shutdown
* Boot card on a pre-D0-stepping board
* Run through initial setup
* Enable proposed (https://wiki.ubuntu.com/Testing/EnableProposed)
* Upgrade mesa to proposed version
* Reboot
* Ensure login and desktop works properly on the pre-D0 board
* Test applications; ignore snapped applications until the mesa content snap
is updated -- test deb-packaged applications, including video players
* Shutdown
For all Pi 4 and Pi 5 boards including a D0-stepping board (e.g. Pi 5
2GB), using the upgraded card:
* Boot card on board
* Ensure login and desktop works properly on the D0 board
* Test applications; ignore snapped applications until the mesa content snap
is updated -- test deb-packaged applications, including video players
[ Regression Potential ]
Given the changes are restricted to the v3d driver, which itself is
only used on the Pi 4 and Pi 5 boards (no other hardware uses this
chipset), we can be reasonably confident that only Pi boards are
likely to be affected. The test plan above should cover operation on
all pre and post-D0 boards, to ensure we do not regress existing
operation of the desktop.
[ Original Description ]
The Raspberry Pi 5 2GB model now uses the D0 stepping of the 2712 SoC.
Unfortunately, this is only supported from Mesa 24.2.0 (see
https://docs.mesa3d.org/relnotes/24.2.0.html -- search for 2712D0).
The result is corrupted or blank output for the current Ubuntu 24.04.1
Pi desktop (using Mesa 24.0.9). The forthcoming oracular desktop does
work as far as login goes, but snapped applications are still relying
on an older mesa, thus the software center, firefox, and thunderbird
all fail to operate.
Although the D0 is only on the 2GB model *currently*, it is
anticipated to become common to the entire Pi 5 line up going forward,
and will be present on the forthcoming CM5.
Could we investigate either bumping mesa in noble, and the
corresponding content snap, or finding the minimal patch-set necessary
to support the D0 stepping and back-porting that?
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