Hello, im new, i dont know what info you need from me, but on KDE wayland, i just cant use multiple displays.
My PC specs are as follows:
CPU - 9950x
GPU - 7900xtx
RAM - DDR5 96GB
OS: archlinux
PC was built month ago or less.
I have multiple monitors/displays.
- MSI monitor (DP) 360Hz 2k
- DELL monitor (DP) 144Hz 2k
- TV (HDMI) 60Hz 4k
- huion kamvas 13 gen3 60Hz 1080p via thunderbolt to DP - here i have tried directly to connect pen display outside thunderbolt card via hdmi, it didnt help. The pen display has USBC connections, so thats why im using thunderbolt add-in card. THe tablet came with 2x USB 1x hdmi to USBC adapter cable.
Problem is as follows:
When i have monitors 1. and 2. online, i try to turn on my 3. TV then TV has no signal. I turn off either 1. or 2. and TV has signal.
When i have TV online, and i turn on the 4. huion tablet, everything works. Now if i turn on the monitor, huion tablet goes offline. If i turn off TV here then huion tablet has signal and monitor has signal. Now if i turn on another monitor then the second monitor has no signal. If i turn off the huion tablet then my monitor has signal.
This is very unusable situation because i want to use my monitors and tablet at the same time. I can live with TV not working when monitors are online. But not with tablet not working.
I tested this with gnome wayland, while it works with three displays (1. 2. 4.) when i turn on the TV then it has signal but all the monitors report that they have the native refresh rates in the settings GUI page but in reality they are choppy on high refreshrate displays and it feels like 60HZ like the lowest screen refresh rate which is either TV or huion pen display.
X11 has the problem not playing well with multiple resolutions and multiple refreshrates, so its unusable while all my screens have varriable refresh rates.. i dont know how to properly set it up or if it is possible.
Prior to plasma updates and mesa driver updates that happened last week or this week, the problem was more severe. While now the display that i connect shows no signal, in the past it would throw me into tty. I then turn off the last display and the session goes back to normal with kwin crash report.
Now it just goes no signal, no kwin crashes, no session to tty.
It would be nice to fix this problem. I was sold that on linux AMD “Just works” … but… you know my pain.