HDMI 1440p Monitor not displaying correctly. Fedora 26
Hi all, I just brought home a 1440p monitor to use. It works fine on my windows partition but is having some issues on Fedora 26.
I am using a RX 580 with an Asus PB258 and it is not looking good. I really don't know what to do to fix this, help would be appreciated.
Here are some pictures of what's happening. https://imgur.com/a/GP2ce
EDIT: I tried installing Ubuntu to see if it worked. I was excited when the monitors were working correctly from the sample OS that runs off of the USB drive and lets you install the OS. I happily installed Ubuntu because it seemed to be working. However, when I finally ran Ubuntu from disk, the monitor was having the same issue as on Fedora. Why would this be? Could it be some software update thats downloaded during installation??
Surprisingly, the resolution is correctly set as shown below in my monitors.xml file
VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/580] [1002:67df] (rev e7)
Subsystem: Tul Corporation / PowerColor Device [148c:2378]
Kernel driver in use: amdgpu
Kernel modules: amdgpu
<output name="HDMI-1">
<vendor>ACI</vendor>
<product>ASUS PB258</product>
<serial>G6LMTJ009807</serial>
<width>2560</width>
<height>1440</height>
<rate>59.961124420166016</rate>
<x>1920</x>
<y>0</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>no</primary>
<presentation>no</presentation>
<underscanning>no</underscanning>
</output>
AMDGPU-PRO is incompatible with Fedora 26, you should remove it and use built-in amdgpu driver (it's possible that you're using it already, but some parts of PRO driver are interfering).
I removed the amdgpu-pro drivers and made sure I am using the amdgpu drivers. It still doesnt work. Does anyone know what this screen effect would even be called so I can research it more?
Compare
lsmod
,xrandr
and mentioned by alextheotocat /sys/class/drm/card0/device/power_dpm_force_performance_level
output between live and installed linux.You might also try out this kernel with upcoming, completely rewritten display code https://copr.fedorainfracloud.org/cop...
@ozeszty Here is the results from both of those commands on live and installed ubuntu. https://docs.google.com/document/d/1c...vGtSPugGWAWlx35sZh8/edit?usp=sharing powerdpmforceperformance_level was auto for both.
@ozeszty your reccomendatoin to try
xrandr
led me in the right direction to load Classic GNOME which fixed the problem. I wonder if theres a better solution!