Arch Linux

Chromobeat

Member

Registered: 2018-10-29

Posts: 5

Enabled 2nd monitor on Display Settings but the monitor has no signal

Hello there, I'm dualbooting Arch Linux with my windows install, with the intent of making a soft transition into linux.

As I said, I entered the Display Settings, and I tried to enable the 2nd monitor, but I get no signal from it. Xrandr is detecting it properly and it thinks it is working properly.

I am using an R9 380, with xorg and KDE Plasma 5.

I also have a reddit thread, so if you want to take a look at it for any questions there, feel free to do so: https://www.reddit.com/r/archlinux/comm … de_plasma/

The output of xrandr -q: https://pastebin.com/BdAKaDMC

Display Settings Screenshot: https://i.imgur.com/xPsqT07.png

I really need the help, so thanks for helping!

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,433

Re: Enabled 2nd monitor on Display Settings but the monitor has no signal

Post a dmesg and a xorg.log when connecting the monitor, also just to rule it out, what's the behaviour with amdgpu.dc=0 on your kernel params?

Chromobeat

Member

Registered: 2018-10-29

Posts: 5

Re: Enabled 2nd monitor on Display Settings but the monitor has no signal

Post a dmesg and a xorg.log when connecting the monitor, also just to rule it out, what's the behaviour with amdgpu.dc=0 on your kernel params?

Hello, thanks for the reply!

So, here is the dmesg output: https://pastebin.com/5CYkNjxH

Here is the xorg.0.log file: https://pastebin.com/cHkYZrCb (Sorry if it is too long - I just googled my way to that log!)

And I don't understand by "whats the behavior with amdgpu.dc=0 on my kernel params". Do you want me to give you a log or something for that?

Thanks a lot for answering!

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,433

Re: Enabled 2nd monitor on Display Settings but the monitor has no signal

Try adding amdgpu.dc=0 to your kernel parameters and check if you can still reproduce the issue. And maybe try ruling out something physical, did you try a different cable/port already?

Last edited by V1del (2018-10-30 10:14:34)

Chromobeat

Member

Registered: 2018-10-29

Posts: 5

Re: Enabled 2nd monitor on Display Settings but the monitor has no signal

Try adding amdgpu.dc=0 to your kernel parameters and check if you can still reproduce the issue. And maybe try ruling out something physical, did you try a different cable/port already?

Wow, thanks! That made it work!

Thank you so much!