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<div class="moz-cite-prefix">Yes, absolutely. Do you only get a
black screen?<br>
<br>
That would certainly be a rather big bug.<br>
<br>
Christian.<br>
<br>
Am 04.01.21 um 13:37 schrieb Davide Corrado:<br>
</div>
<blockquote type="cite" cite="mid:CAM0ywnxfw6CngRnVhB-9f_5TOVaGe9KO6LJ310vqiguz=wj10Q@mail.gmail.com">
<div dir="auto">Btw, should the driver switch to the lower
supported resolution then?</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Il Lun 4 Gen 2021, 13:04
Davide Corrado <<a href="mailto:davide@davidecorrado.eu" moz-do-not-send="true">davide@davidecorrado.eu</a>> ha
scritto:<br>
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.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">Hello. This resolution is supported by the Apu
and the motherboard specs. Will try what you suggest and let
you know</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Il Lun 4 Gen 2021, 12:10
Christian König <<a href="mailto:ckoenig.leichtzumerken@gmail.com" target="_blank" rel="noreferrer" moz-do-not-send="true">ckoenig.leichtzumerken@gmail.com</a>>
ha scritto:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div>Hi Davide,<br>
<br>
adding a few of our AMD display people.<br>
<br>
In general as already suggested by others opening a
bug report to track this is the right thing to do.<br>
<br>
In the past we had a few bug reports like this because
amdgpu is more strict in checking hardware
limitations.<br>
<br>
For example it can be that your HDMI port on the board
can only handle a certain maximum pixel clock, but
radeon is ignoring this while amdgpu isn't.<br>
<br>
What you can try to do is to manually override the
used mode, e.g. copy the modeline used when radeon is
active and manually add that using xrandr when amdgpu
is active and see if it works or not.<br>
<br>
Regards,<br>
Christian.<br>
<br>
Am 02.01.21 um 19:50 schrieb Davide Corrado:<br>
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<div dir="ltr">
<div>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<i>.</i>
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).</div>
<div><br>
</div>
<div>Some info of my hardware:</div>
<div><br>
</div>
<div>cpu: AMD A10-7870K Radeon R7, 12 Compute Cores
4C+8G</div>
<div>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</div>
<div>Monitor: Samsung U28E590.</div>
<div><br>
</div>
<div>description:<br>
</div>
<div>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@30Hz). Using a full HD monitor results
in no issues, so it must be related to this very
4k resolution.<br>
</div>
<div><br>
</div>
<div>As I have already stated, radeon module works
with the same software/hardware configuration.<br>
</div>
thanks you so much for your time :-)<br>
<div>
<div><br>
-- <br>
<div dir="ltr" data-smartmail="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">Davide Corrado<br>
<div>UNIX Team Leader<span><br>
</span></div>
<div><br>
</div>
Via Abramo Lincoln, 25<br>
20129 Milano<br>
<br>
Tel +39 3474259950<br>
</div>
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