@Alberto: Is there any chance that this work-around works without gdm3?
I'm using ubuntu-server 18.04 and this my laptop configuration:
➜ ~ inxi -G
Graphics: Card-1: Intel HD Graphics 5500
Card-2: NVIDIA GK208M [GeForce 920M]
Display Server: X.Org 1.19.6 driver: intel Resolution:
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OpenGL: renderer: Mesa DRI Intel HD Graphics 5500 (Broadwell GT2)
version: 4.5 Mesa 18.0.5
I followed the steps and installed required packages as follows:
➜ ~ sudo apt install nvidia-driver-390/bionic-updates
ubuntu-drivers-common/bionic-proposed nvidia-prime/bionic-proposed
nvidia-settings/bionic-updates libnvidia-gl-390/bionic-updates
libnvidia-compute-390/bionic-updates libnvidia-decode-390/bionic-updates
libnvidia-encode-390/bionic-updates libnvidia-ifr1-390/bionic-updates
libnvidia-fbc1-390/bionic-updates
Then I executed "sudo prime-select nvidia".
But after rebooting, I have no openGl support and this error is present at
Xorg's logs:
VGA arbiter: cannot open kernel arbiter, no multi-card support
Nvidia kernel modules are loaded and Xorg seems to register nvidia driver at
init.
If I try to run glxgears for example, I get the following message:
glxinfo Error: couldn't get an RGB, Double-buffered visual
And using "sudo prime-select intel" also leaves me without GL. I think
this is something related to gpu-manager, because I am not using any
display manager, just running xorg from startx.
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Title:
SRU: PRIME Power Saving mode draws too much power
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