Geforce RTX30 mobile series does not recognize second monitor in Ubuntu 22.04


in my laptop (Acer Predator Helios 300 PH317-55-70VW (NH.QB7EU.00N)), which is equipped with a RTX3070, when I try to use an external monitor using the HDMI output, it is not recognized.
I had a similar problem, and it was solved (can’t attach the second link in one post).

Today it stopped detecting the second monitor and I find out that drivers someway switched to the open-source version. I changed it to the v525 drivers, but it doesn’t help.

nvidia-bug-report attached: (111.6 KB)

Any ideas about how to solve it?

Many thanks

Seems you were upgraded to a 6.0 oem kernel and the driver got lost. Please try reinstalling the kernel headers
sudo apt install --reinstall linux-headers-$(uname -r)
then check if the driver got recompiled
dkms status

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