1360x768 Vega graphics display staggered

[Mike Birch]

This was the go-to resolution pre-update. All of the other modes seem to work.

Release 20.04 LTS (Focal Fossa) 64-bit
Kernel Linux 5.4.0-29-generic x86_64
MATE 1.24.0
Processor: AMD Ryzen 3 2200G with Radeon Vega Graphics × 4
Graphics: AMD RAVEN (DRM 3.35.0, 5.4.0-29-generic, LLVM 9.0.1)
lspci output: 38:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] (rev c8)

As you can see from the attached image, the display shifts to the right every few lines.

Still working on installing the full amdgpu package (libffs 6 required, 7 installed so I'm working on the bits).

[Mike Birch (mike-immortalsofar)]

This bug still seems to be active:
https://forums.gentoo.org/viewtopic-p-8537062.html#8537062
It is still happening on my machine except the interference seems to be more corrupt along the lines of Simon's image.
I believe it briefly stopped some time ago but by the time I started checking the new versions, it started up again.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Nathan Rennie-Waldock (nathan-renniewaldock)]

Seeing this too with a fresh install of Xubuntu 20.04.2 on a Ryzen Embedded V1605B

I've tested kernel 5.11, 5.12.13 and 5.13, only 5.13 was working correctly. Booting with nomodeset also corrected the display

[Timo Aaltonen (tjaalton)]

so this is a kernel bug

impish will soon get 5.13, but you also have the option of installing oem-5.13 from focal-proposed (apt install linux-oem-20.04c)