Regular screen glitch on Thinkpad T14s Gen3 AMD

Did you try naguams workaround?

Yes: I set amdgpu.dcdebugmask=0x10 in /etc/default/grub:

...
GRUB_CMDLINE_LINUX="... amdgpu.dcdebugmask=0x10"
...
# grub2-mkconfig -o /boot/grub2/grub.cfg
# reboot
...
[root@t14s dri]# cat /sys/kernel/debug/dri/1/eDP-1/psr_capability
Sink support: yes [0x03]
Driver support: no [0xffffffff]
[root@t14s dri]# cat /sys/kernel/debug/dri/1/eDP-1/psr_state
0

I will post a message by tomorrow, to tell you whether the problem is fixed or not.

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