*** This bug is a duplicate of bug 1958591 ***
https://bugs.launchpad.net/bugs/1958591
** This bug is no longer a duplicate of bug 1958412
[amdgpu] Flickering/noise on screen started in kernel 5.13
** This bug has been marked a duplicate of bug 1958591
[amdgpu] Random noise 'static' display after internal display turned off/on
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https://bugs.launchpad.net/bugs/1958248
Title:
[amdgpu] Screen garbled on login and freezes on resume from suspend
(kernel 5.13.0-25.26~20.04.1-generic)
Status in linux package in Ubuntu:
Confirmed
Bug description:
1. The login manager works but as soon as I log in, the screen is
filled with colored vertical stripes and is unusable. I found that if
I change the screen resolution to the maximum (1920x1080), then the
screen is ok. Any other resolution that I've tried (eg (1440x900 used
to be my preference) causes the unreadable display and it does not
revert back, requiring a reboot.
2. Coming out of suspend, the password entry screen is displayed, but
there is no response to keyboard or mouse, requiring a reboot.
HP Envy x360 laptop with AMD Ryzen 7 with Radeon graphics
Last known kernel that worked is 5.11.0-46
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