Bug#602095: [nouveau] black screen after reboot
Julien Tailleur wrote:
> I can't do that. If I unblacklist nouveau and remove the nvidia driver, I
> just get a black screen right after grub and do not have access to dmesg.
Ah, that makes sense.
When you get the black screen, is the machine still usable? E.g., can
you ssh into it, or can you run commands "blindly"? Does ctrl-alt-delete
work? Does the magic sysrq key work? Can you see text on the screen
if you use a bright flashlight to look at it?
Hopefully something like the following can work:
dmesg >log.before && modprobe nouveau && dmesg >log.after
It might also be possible to get the relevant information from
/var/log/dmesg or /var/log/dmesg.0 after rebooting.
Sorry for the slow response, and hope that helps.