Btw, should the driver switch to the lower supported resolution then? Il Lun 4 Gen 2021, 13:04 Davide Corrado ha scritto: > 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 > 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 >> >> >>