As professional activities are slowed down, I thought it was a good moment for upgrading my work-pc - still on beloved Ubuntu/Unity 16.04
So I’ve tried UBudgie on that machine from a live-usb and all looks fine : 2 monitors with right resolutions ( no HiDPi here ), ethernet network ok ( no wifi on that machine ).
Confident, I installed UB on it, deleting dear Unity 16.04 ( and also a « regular » Ubuntu 18.04 installed on dual boot which used to work with nouveau. )
And now I regret. On reboot, only one monitor fires up, and with a wrong resolution I can’t change 1024x768px.
Using additional drivers, I see system right after install is using nvidia-driver-450-server.
I changed that back to xserver-xorg-video-nouveau : nothing changed on next reboot, only one monitor and wrong resolution.
I removed-purged anything nvidia related, no better luck.
Another weird thing, in whatever situation, I had never been able to see GRUB and eventually access « recovery mode ». Hitting [ Esc ] or [ Shift ] had zero effect - not the first time I see that in Budgie.
myself@PROLiANT:~$ lspci -vnn | grep -A 12 '\''[030\]' | grep -Ei "vga|3d|display|kernel" 01:00.0 VGA compatible controller : NVIDIA Corporation GF116 [GeForce GTS 450 Rev. 2] [10de:1245] (rev a1) (prog-if 00 [VGA controller]) Kernel modules: nvidiafb myself@PROLiANT:~$ sudo lshw -enable pci -class display [sudo] Mot de passe de myself : *-display NON-RÉCLAMÉ description: VGA compatible controller produit: GF116 [GeForce GTS 450 Rev. 2] fabricant: NVIDIA Corporation identifiant matériel: 0 information bus: pci@0000:01:00.0 version: a1 bits: 64 bits horloge: 33MHz fonctionnalités: pm msi pciexpress vga_controller bus_master cap_list configuration : latency=0 ressources : mémoire:d6000000-d7ffffff mémoire:c8000000-cfffffff mémoire:d0000000-d3ffffff portE/S:2000(taille=128) mémoire:c0000-dffff myself@PROLiANT:~$ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768 default connected primary 1024x768+0+0 0mm x 0mm 1024x768 76.00* myself@PROLiANT:~$
My assumption here : that quite old graphic card is no longer supported by any nvidia driver in Ubuntu and Ubiquity should not install any of these nvidia drivers ( in my situation, I understand why it may be interesting with recent cards ).
Since everything worked fine in usb-live-session, what are my best chances to get a working system without reinstalling ?
In other words what is now actually preventing nouveau from working, as just as it was working in live-usb-session ?
And to be honest I don’t mind re-installing - my DATA are safe - but I’d like to understand why once installed, it’s not functional.