amdgpu does not support 3840x2160 at 30Hz on kaveri apu

[Davide Corrado]

Cool, thanks!

Il Dom 3 Gen 2021, 12:06 Mike Lothian <mike at fireburn.co.uk> ha scritto:

> Hi
>
> You're probably best reporting the bug here:
>
> https://gitlab.freedesktop.org/drm/amd/-/issues
>
> Attach the output of dmesg from both Radeon and AMDGPU and the compositor
> / Wayland logs (as you're not using X)
>
> Cheers
>
> Mike
>
>
>
> On Sun, 3 Jan 2021, 06:32 Davide Corrado, <davide at davidecorrado.eu> wrote:
>
>> hello, I'd like to report this issue that I am having since I updated my
>> display (samsung U28E590). The amdgpu does not support the native
>> resolution of my new monitor, which is 3840x2160*.* Using a HDMI or DVI
>> connection (I tried both, same results), the maximum supported refresh is
>> 30Hz, so I'm stuck with that (don't have a displayport). The radeon module
>> works fine, I'm having this issue just when I use amdgpu (which I'd like
>> to, because performance is better).
>>
>> Some info of my hardware:
>>
>> cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
>> kernel version (I tried different ones and different linux distros, same
>> results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020
>> x86_64 x86_64 x86_64 GNU/Linux
>> Monitor: Samsung U28E590.
>>
>> description:
>> If I boot the system using amdgpu and no video mode selection, the system
>> boots but I don't get a screen during boot and in wayland. I can connect
>> using ssh, so the system is running fine, just no display; If I force a
>> full HD resolution with "video:" in the kernel line, I can see the boot
>> process but the screen disappears when wayland starts (because the default
>> resolution is 3840x2160 at 30Hz). Using a full HD monitor results in no
>> issues, so it must be related to this very 4k resolution.
>>
>> As I have already stated, radeon module works with the same
>> software/hardware configuration.
>> thanks you so much for your time :-)
>>
>> --
>> Davide Corrado
>> UNIX Team Leader
>>
>> Via Abramo Lincoln, 25
>> 20129 Milano
>>
>> Tel +39 3474259950
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>
>
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