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I have a dual boot installation with Windows 7 and Ubuntu 12.04 LTS. I am currently trying to solve this problem, where any mouse and keyboard input is ignored on the login screen.

The apparently helpful answer ("Phew! Thanks for the help blue; so this is what I ended up doing: ...") suggests to start by entering the recovery mode from the grub boot menu.

My grub ("GNU GRUB version 1.99-21ubuntu3.14") boot menu displays the following options:

  • Ubuntu, with Linux 3.2.0-50-generic-pae
  • Ubuntu, with Linux 3.2.0-50-generic-pae (recovery mode)
  • Previous Linux versions
  • Memory test (memtest86+)
  • Memory test (memtest86+, serial console 115200)
  • Windows Recovery Environment (loader) (on /dev/sda1)
  • Windows 7 (loader) (on /dev/sda4)

The first option brings me to the usual graphical login screen where, in the current state, there is no reaction. The second option ("Ubuntu (...) (recovery mode)") displays lots of text running over the text-only screen, then it enters the graphical login screen as well, where again I have no way to input anything.

How do I get into recovery mode?

I have found quite some similar questions, none of which seems to apply to my situation:

  • This one seems to refer primarily to single-boot-setups where one doesn't normally get into grub, but even then, once within grub, the entry "... (recovery mode)" is claimed to help, which is not the case for me.
  • This one too claims that the "... (recovery mode)" entry will bring me anywhere else than the normal Ubuntu boot entry.
  • This one doesn't even see any option that looks like a recovery mode.
  • This one talks about getting somewhere else with the "... (recovery mode)" entry, but being unable to input anything there.
  • This one talks about being unable to enter the recovery mode from grub, though with different symptoms that what I am experiencing (plus there is no answer/solution provided yet).
  • This one experiences simply a freeze upon entering the "recovery mode" from grub.
  • This one too does get into some recovery menu and has their problem only then.
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