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wondr
February 13th, 2011, 03:42 PM
Hey!

After upgrading to natty alpha I enabled the nvida graphics drivers. Now I can't boot and get stuck on a purple screen, without grub.
Can I with a live cd revert the drivers back to normal?

Krytarik
February 13th, 2011, 10:50 PM
Can I with a live cd revert the drivers back to normal?
No, not without "chrooting" into your system from there, a bit complicated.

Did you already try booting into recovery mode?!

EDIT: Oh, without Grub, then press "Shift" to get the boot menu.

wondr
February 14th, 2011, 05:33 PM
it doesn't response at all when stuck at that purple screen. shift did nothing.

Krytarik
February 14th, 2011, 07:08 PM
it doesn't response at all when stuck at that purple screen. shift did nothing.
You have to press Shift right after your BIOS screen, or even before, just to be sure.;)

If you have Grub legacy instead of Grub2, press Esc.

shademere
May 4th, 2011, 03:44 PM
Hello there,

I have a simliar problem. After installing the drivers I can get to GRUB, but neither the normal nor recovery boot options work. The normal option hangs at

mountall: disconnected from Plymouth

while in recovery mode the boot hangs and shows the message

ata6: SATA link down (SStatus 0 SControl 300)

What could be the problem? How can boot from a recovery/installation disk? How does chroot work?

Thank you.

Krytarik
May 4th, 2011, 04:13 PM
shademere, try setting "nomodeset" as a kernel boot option:
http://ubuntuforums.org/showthread.php?t=1613132