Arch Linux

justsquid

Member

Registered: 2022-07-07

Posts: 12

[SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

I installed a new RX 6600 XT alongside my GT 1030, and now SDDM won't properly start.
I've installed the proper drivers for both cards (amdgpu and nvidia-dkms respectively, as I use linux-zen), yet I'm still stuck on what I should do to get this working.
I'm aware of Xorg confs and KMS, however I do not know how to properly set those up at this time.

Last edited by justsquid (2022-07-08 15:14:50)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,208

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

Which card do you want to run your xorg on/is plugged into the monitor? Post your /var/log/Xorg.0.log

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

Both cards are plugged in, the GT 1030 is thru a DVI monitor and the RX 6600 XT thru a HDMI monitor respectively.
And how much of the Xorg log do you need?

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

Ok, so I followed --> https://medium.com/@aviezab/dual-gpu-am … 88f9874c2d <-- This guide, and I have output thru the GT 1030 on my DVI monitor, but now the AMD GPU is just outputting console logs on the HDMI display, how do I get dual monitor from here?

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,208

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

What is your end goal here? These are two different GPUs  you could run a second but separate Xorg screen on the other GPU but you cannot move windows/applications between them (when they are open, you can export a distinct DISPLAY for each application you want to start on one or the other) see: https://wiki.archlinux.org/title/Xorg#M … phics_card https://wiki.archlinux.org/title/Multihead and you might run into trouble with how your window manager reacts to that.

Last edited by V1del (2022-07-07 13:56:11)

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

Would I stick the Device section in the monitor conf file, or would it be somewhere else?

[edit] I just saw the part where you mentioned window manager issues, I'm using KDE with KWin, so what would that mean for my setup?

Last edited by justsquid (2022-07-07 14:02:10)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,208

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

Try adding Screen 0 to the nvidia.conf and Screen 1 to the amdgpu.conf's respective OutputClass section assuming you still have the config from the article, alternatively https://wiki.archlinux.org/title/PRIME#Reverse_PRIME should work as well.

But to give more apt advice we'd really need a xorg log, and best all of it and check whether you also have a /var/log/Xorg.1.log https://wiki.archlinux.org/title/List_o … n_services

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

http://0x0.st/oQgr.txt Xorg.0.log
Xorg.1.log doesn't exist in /var/log

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,208

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

And what's in /etc/X11/xorg.conf now?

A minimal example for the approach I have in mind would be

Section "OutputClass"
  Identifier "amdgpu"
  MatchDriver "amdgpu"
  Screen 1
EndSection

Section "OutputClass"
  Identifier "nvidia"
  MatchDriver "nvidia-drm"
  Screen 0
EndSection

Or follow the section regarding reverse PRIME, adjust all the bits and pieces accordingly and run the xrandr commands that are mentioned at the end of the link from your   /usr/share/sddm/scripts/Xsetup

Edit: Wait the minimal example will likely not work like that.

Last edited by V1del (2022-07-07 15:02:46)

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

http://0x0.st/oQg1.txt xorg.conf
Currently, just the Nvidia GPU attached to the DVI monitor

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

What is your end goal here? These are two different GPUs  you could run a second but separate Xorg screen on the other GPU but you cannot move windows/applications between them (when they are open, you can export a distinct DISPLAY for each application you want to start on one or the other) see: https://wiki.archlinux.org/title/Xorg#M … phics_card https://wiki.archlinux.org/title/Multihead and you might run into trouble with how your window manager reacts to that.

I think having two separate screens would work as long as I could move the mouse seamlessly between the two monitors/gpus. The layout is the DVI monitor is below the HDMI monitor, I could have the DVI be the primary and the HDMI be secondary. Ideally, I would have games and media automatically launch on the HDMI monitor as that's where the beefier AMD GPU is plugged in, and lighter stuff such as web browsing or chatting clients would go through the lesser Nvidia GPU.

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

Alright, quick update:
Switched from nvidia to nouveau
Got both displays to work
Now I need help with PRIME because I get this error

X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  34 (RRSetProviderOffloadSink)
  Value in failed request:  0x62
  Serial number of failed request:  16
  Current serial number in output stream:  17

Will be posting in separate thread

justsquid

Member

Registered: 2022-07-07

Posts: 12

Re: [SOLVED] RX 6600 XT and GT 1030 can't be used at the same time?

http://0x0.st/oQGD.txt <-- updated xorg.conf
Marking this as solved for now