Tried again the actual nouveau driver, with the same result: The screen displyed only some relics of former activity, no work possible in Ubuntu. REISUB properly restarts.
The worst: A restart into recovery mode freezes at the stage, where a selection is expected (resume of boot, start in text mode etc.). No input is accepted, REISUB shows no response.
I modified the grub booting line (pressing 'e') and replaced "quit splash" by nomodeset and was able to enable the non-propriety driver again. Uff!
Tried again the actual nouveau driver, with the same result: The screen displyed only some relics of former activity, no work possible in Ubuntu. REISUB properly restarts.
The worst: A restart into recovery mode freezes at the stage, where a selection is expected (resume of boot, start in text mode etc.). No input is accepted, REISUB shows no response.
I modified the grub booting line (pressing 'e') and replaced "quit splash" by nomodeset and was able to enable the non-propriety driver again. Uff!