Hello. This resolution is supported by the Apu and the motherboard specs. Will try what you suggest and let you know
Il Lun 4 Gen 2021, 12:10 Christian König <ckoenig.leichtzumer...@gmail.com> ha scritto: > Hi Davide, > > adding a few of our AMD display people. > > In general as already suggested by others opening a bug report to track > this is the right thing to do. > > In the past we had a few bug reports like this because amdgpu is more > strict in checking hardware limitations. > > 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. > > 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. > > Regards, > Christian. > > Am 02.01.21 um 19:50 schrieb Davide Corrado: > > 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@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 > listamd-gfx@lists.freedesktop.orghttps://lists.freedesktop.org/mailman/listinfo/amd-gfx > > >
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