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I changed the drivers for the GPU in ubuntu 12.04 because there were 4 available versions and I wanted to try them to fix the resolution problem, but when I restarted it now the computer wont start and it showing me the following options:

  • ubuntu, with linux 3.5.0-32-generic
  • ubuntu, with linux 3.5.0-32-generic (recovery mode)
  • Previous linux versions
  • memory test (memtest86+)

  • memory test (memtest86+, serial console 115200)

or I can press 'c' for command line.

I assume I need to fix the drivers but I dont know how to do it with the command line

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