Comment # 26 on bug 1193397 from Nikolai Nikolaevskii

(In reply to Nikolai Nikolaevskii from comment #17)
> According to inxi output OP uses Intel Core i7-10700K + ASUSTeK PRIME Z490-A
> + AMD Navi 21 video card.
> With Intel Core i7-10700K he has 2 video cards: built-in Intel UHD 630 and
> discrete AMD (previously Nvidia). But inxi shows only AMD Navi 21.
> There are some settings in BIOS about video cards: disable/enable iGFX (i.e.
> built-in), and which video card BIOS will initialize first - built-in or
> discrete.
> So, if built-in video card is disabled, but is set to be initialized first,
> he may get observed behaviour.
> 
> To OP: please provide full output for command:
> sudo inxi -aSCGImz

OK, theory was good, but failed.

New one:
https://wiki.archlinux.org/title/AMDGPU#Issues_with_power_management_/_dynamic_re-activation_of_a_discrete_amdgpu_graphics_card

[QUOTE]
Issues with power management / dynamic re-activation of a discrete amdgpu
graphics card

If you encounter issues similar to [9], you can workaround the issue by setting
the kernel parameter amdgpu.runpm=0, which prevents the dGPU from being powered
down dynamically at runtime.
[/QUOTE]

Try to use parameter amdgpu.runpm=0.