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4

Ubuntu 22.10 external monitor not working

rated 0 times [ 4] [ 0] / answers: 1 / hits: 4426 / 2 Years ago, mon, august 29, 2022, 3:19:55

The title says it all.

I just upgraded from Ubuntu 22.04 to 22.10, and noticed that my external monitor doesn't receive any signal anymore.

I'm connecting it with a USB-c to USB-c cable. Tried a lot of fixes I found online, none of which worked.

This is the output of lspci -v | grep VGA -A2:

01:00.0 VGA compatible controller: NVIDIA Corporation GA106M [GeForce RTX 3060 Mobile / Max-Q] (rev a1) (prog-if 00 [VGA controller])

    Subsystem: Lenovo GA106M [GeForce RTX 3060 Mobile / Max-Q]

    Flags: fast devsel, IRQ 255, IOMMU group 9

Any ideas?

Thanks!

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irripri

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answered 2 Years ago armis · Accepted Answer

I have been having the same issue on my Lenovo Legion 5 Pro 16ITH6. The only thing that worked for me (so far) has been switching to the noveau driver and switching from switching graphics to the performance graphics card. In doing so I seem to have also lost brightness controls...

I had already tried various combinations of the kernels 5.19 and 5.15, the nvidia drivers 520 through 470, and the two graphics settings.
If you're just looking for a get-you-by solution I hope this helps, or if someone comes along with a better solution I'm eagerly awaiting it.

Edit: I tried a few more configs, I was able to get "switching" (it'll just use the iGPU) graphics to work with the noveau drivers, I had a boot with the noveau drivers with the discrete card that was super glitchy, and at one point I had the discrete graphics selected with the nvidia-470 driver.

Ensure when switching between drivers you uninstall the old one completely (and possibly reboot between installs) with:

sudo apt purge nvidia*

sudo apt autoremove