Created attachment 849289 [details]
Output of "sudo journalctl --no-pager | grep "amdgpu" > journalctl.output"

Hi. 

I have a laptop with AMD processor and AMD video card. Past times, my laptop
constantly freezes and I would wait to ending this for a while. (    
approximately 10 mins) I'm a KDE user and it mostly happens while using Qt
applications. (E.g Spectacle)

I was looking for a solution for a long time and I asked this to OpenSUSE's
Telegram group. They said it caused by ACPI and recommend me to switch off the
ACPI by boot parameteres,  I didn't do it and I get used to use my system by
this way.

However when I block the graphical switch (with "echo 1 | tee
/sys/bus/pci/devices/0000\:01\:00.0/remove"), this problem goes away and I
understand it relates with graphical switch. Then I looked at journalctl and I
see some weird AMDGPU output when system freezes.

Information about my system: 
AMD Ryzen 7 3700U
AMD Radeon RX540