Ubuntu
udev package

  1. Bug #543036
  2. Comment #14

Comment 14 for bug 543036

Revision history for this message
Martin Pitt (pitti) wrote : Re: Lenovo Y550 - monitor settings and wireless settings buttons not work

No, this isn't expected. Freezing the desktop *and* not producing any scan code is an entirely new phenomenon which I never encountered before. To be sure, can you please check whether pressing Ctrl+Alt+F1 (to switch to a text console) and then Ctrl+Alt+F7 or Ctrl+Alt+F8 (to switch back to the graphical desktop) will cure the hang?

Also, can you please doublecheck that you ran keymap against the correct input device? Do you see scan codes for the other keys there?