Arch Linux

aary1155

Member

Registered: 2023-03-06

Posts: 2

[SOLVED]Second monitor not being detected

My second monitor is not being detected, even though it works fine on windows.

lspci ouput
01:00.0 VGA compatible controller: NVIDIA Corporation GA102 [GeForce RTX 3080 12GB] (rev a1)
    Subsystem: ASUSTeK Computer Inc. Device 886e
    Kernel modules: nouveau, nvidia_drm, nvidia

xrandr output:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 3840 x 2160, current 3840 x 2160, maximum 3840 x 2160
default connected primary 3840x2160+0+0 0mm x 0mm
   3840x2160     88.00*

While I was installing arch, I could see that both screens were working in mirror mode. But once I finished installing and rebooted, there is no signal on the secondary display.

It seems that I can use one monitor at a time, so I am able to use just the second monitor, in this case there is no signal to the first monitor.

Please let me know if more information is needed.

Last edited by aary1155 (2023-03-07 06:38:51)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 76,358

Re: [SOLVED]Second monitor not being detected

lspci ouput
01:00.0 VGA compatible controller: NVIDIA Corporation GA102 [GeForce RTX 3080 12GB] (rev a1)
    Subsystem: ASUSTeK Computer Inc. Device 886e
    Kernel modules: nouveau, nvidia_drm, nvidia

xrandr output:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 3840 x 2160, current 3840 x 2160, maximum 3840 x 2160
default connected primary 3840x2160+0+0 0mm x 0mm
   3840x2160     88.00*

Please post the complete outputs and your Xorg log, https://wiki.archlinux.org/title/Xorg#General
Also use code tags, https://bbs.archlinux.org/help.php#bbcode

The segments you posted may indicate that you're running on the vesa driver, possibly because nvidia failed.
Speculatively https://wiki.archlinux.org/title/NVIDIA#Installation - see the blue note about "ibt=off"

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aary1155

Member

Registered: 2023-03-06

Posts: 2

Re: [SOLVED]Second monitor not being detected

I had tried the ibt=off solution already but hadn't properly regenerated grub.cfg as mentioned here (I am such a noob)
Now that I regenerated grub(after adding ibt=off), both monitors are being detected and 'nvidia-smi' command is also working(which was getting stuck before)
Thanks for your help.

Last edited by aary1155 (2023-03-07 06:36:16)