Kubuntu 22.04 Can't output to external monitors

Graphics / Linux Linux
1

Hi Team, I have an issue where I can’t get my external monitors to work with my laptop.
I’ve got a Thinkpad T15g (2070 Super mobile) running Kubuntu 22.04 with nVidia Driver version: 515.65.01

Interestingly enough I can see the external monitors by running this command:
❯ nvidia-xconfig --query-gpu-info
Number of GPUs: 1

GPU #0:
Name : NVIDIA GeForce RTX 2070 Super with Max-Q Design
UUID : GPU-0021a4ff-04d5-e1da-d330-2451caf0c224
PCI BusID : PCI:1:0:0

Number of Display Devices: 2

Display Device 0 (TV-1):
EDID Name : Acer K242HL
Minimum HorizSync : 30.000 kHz
Maximum HorizSync : 80.000 kHz
Minimum VertRefresh : 55 Hz
Maximum VertRefresh : 76 Hz
Maximum PixelClock : 170.000 MHz
Maximum Width : 1920 pixels
Maximum Height : 1080 pixels
Preferred Width : 1920 pixels
Preferred Height : 1080 pixels
Preferred VertRefresh : 60 Hz
Physical Width : 530 mm
Physical Height : 300 mm

Display Device 1 (TV-3):
EDID Name : Acer K242HL
Minimum HorizSync : 30.000 kHz
Maximum HorizSync : 80.000 kHz
Minimum VertRefresh : 55 Hz
Maximum VertRefresh : 76 Hz
Maximum PixelClock : 170.000 MHz
Maximum Width : 1920 pixels
Maximum Height : 1080 pixels
Preferred Width : 1920 pixels
Preferred Height : 1080 pixels
Preferred VertRefresh : 60 Hz
Physical Width : 530 mm
Physical Height : 300 mm

Also possibly related, in the BIOS I have the option to only use discrete graphics and when switching to that I get stuck on a black screen unable to get to my login prompt

I’ve attached a bug report in the hopes that this helps
nvidia-bug-report.log.gz (303.9 KB)

2

Please delete /etc/X11/xorg.conf.d/20-intel-graphics.conf and uninstall the xorg-video-intel driver.

3

Hi Generix, Thanks for the quick response, I’ve done that now however the monitors are still not available
I’ve attached another bug report
nvidia-bug-report.log.gz (318.0 KB)

4

Please delete
/etc/X11/xorg.conf.d/20-intel-graphics.conf
/usr/share/X11/xorg.conf.d/20-intel.conf

5

Hi Generix,

I’ve done that too, this time on reboot I did see the external monitors activate but it wouldn’t get to the login screen. After leaving it for 5 minutes and it was still stuck on that it booted into recovery and used prime-select intel in order to boot in to which I was able to see the login screen again
nvidia-bug-report.log.gz (129.5 KB)

6

That’s odd, according to the logs from the previous boot, everything was fine. Please also delete /etc/X11/xorg.conf as it’s empty anyway but might confuse the Xserver.

7

Hi Generix,

That did it! I’ve now got both monitors working, thank you so much for your help!

8

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