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trying to install CUDA for my ubuntu 12.04LTS. Installed the NVIDIA drivers for GTX660Ti but haven't yet run the updates. The manual for CUDA says I should now move to a tty via Ctrl+Alt+F1 but that brings a black screen, and the monitor goes to sleep showing nothing. Ctrl+Alt+F7 brings me back though. Thought I could instead modify the /etc/default/grub, uncommenting either one of these lines: -GRUB_TERMINAL=console -GRUB_GFXMODE=640X480 and then sudo update-grub. Both end me into a Error: No video mode activated, which will not leave, and I cannot access anything until I crash it so that I can go to recovery.

So mainly I would like to just install the CUDA, but if I could get my Ctrl+Alt+F1 to work I would like that too. I have tried several ways to fix it, and they all just make things worse. What should I do?

What I'm following btw: How to install cuda 5.5 under Ubuntu 12.04 LTS 64-bit?

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user242625
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  • You may be able to install proprietary drivers from booting to a root shell: http://askubuntu.com/questions/92556/how-do-i-boot-into-a-root-shell – Takkat Feb 02 '14 at 08:13
  • Alvar: that's the exact post I am trying to follow, and with which I have problems. I've linked it just there at the bottom of my question. – user242625 Feb 02 '14 at 14:49
  • Thanks Takkat, at least I got into the non-graphic mode. Unfortunately runlevel didn't work (couldn't find /var/run/utmp), which was needed by the cuda-installer. – user242625 Feb 02 '14 at 15:45

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Not sure of the overall issue, but to boot into terminal if CTRL+ALT +F1 does not work, you could try this:

Open Terminal and type:

sudo gedit /etc/default/grub

look for this line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

change it to:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash text"

then update your grub

sudo update-grub

then restart:

sudo reboot now

if you want to use the desktop just type:

startx

Try at your own risk... backup ALL of your system first... :)

pst007x
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  • Yes, I've tried this. It ends up in the "Error: no video mode activated" -error, which doesn't let me do anything else. – user242625 Feb 02 '14 at 14:46