System freezes when connecting 4th "monitor" to RTX 4090

Graphics / Linux Linux
1

Hey everyone,

I’ve run into a consistent issue on Linux when connecting a fourth monitor to my RTX 4090 using the proprietary NVIDIA driver.

As soon as I connect a 4th monitor (in my case a valve index) to the GPU while the system is running, the system freezes.
I also can’t boot with 4 monitors connected to the GPU. Then it crashes while booting as soon as the Nvidia driver is loaded.

  • No mouse movement
  • No keyboard input
  • No TTY switch possible
  • The system is completely unresponsive and requires a hard reboot.

Hardware:

  • GPU: NVIDIA RTX 4090
  • CPU: AMD Ryzen 9 7950X3D
  • Motherboard: Gigabyte B650 Aorus Elite V2
  • Monitors:
    • 1x LG ‎32GS95UE 3840x2160 240Hz
    • 1x VG278 1920x1080 60Hz
    • 1x SAMSUNG RU7099 2560x1440 60Hz (here i also cant go to 4k 60hz, on windows i can)
    • 1x Valve index (i will try tomorrow with a normal 4th monitor)

Software/Environment:

Distributions tested: Bazitte (Wayland) & Manjaro (X11) – same issue on both
Desktop environment: KDE Plasma
NVIDIA Driver version:** 570.133.07
Kernel: 6.13.9-103.bazzite.fc42.x86_64 (64-bit)

  • Almost everything is fine with 3 monitors connected to the RTX 4090. (except for the Samsung TV which I can’t set to 4k with 60hz)
  • If I connect the 4th monitor to the mainboard, the system runs fine – even though the CPU has no iGPU (which is strange, since it shouldn’t display anything).
  • On Windows, everything works perfectly with all 4 monitors connected to the RTX 4090.
  • Linux with the default graphics driver works fine as well, without the screen freezing – the issue only occurs with the NVIDIA driver.

Please note: I tried Linux for the first time 2 days ago. It took me 2 days to realize that the 4th monitor + the Nvidia driver is the cause of the crashes.
I have attached some logs from the Bazitte Wayland system, but if you need more information, I am willing to provide it. I used ChatGPT to help me here.
I’m also not sure if the logs contain the problem, because I can’t create any logs as soon as all 4 graphics card slots are occupied and therefore the system crashes.
nvidia-bug-report.log.gz (464.8 KB)
nvidiawayland_log.txt (684.0 KB)
wayland_log.txt (56.0 MB)
Xorg.0.log (46.6 KB)

2

Sorry, can’t help with the 4th monitor issue, but that CPU does have integrated graphics, see here.

The debug log and Xorg log both show the driver for it being loaded. Perhaps try disabling integrated graphics under the “IO Ports” section of the BIOS and see if it helps.

3

Oh you are right. GPT gave me some false informations here. Should have checked that by myself.

4

I just noticed, when i start with all 4 monitors connected to the GPU the system boots, but gives me a blackscreen.
After i remove the 4th monitor it takes like 1 minute, then i can see picture on the 3 monitors and its working perfectly.

5

I’m getting the same issue as well with a 4090