Un-marking duplicate: Bug #773524 is fixed for all users except T420 Thinkpads.
It doesn't work for me, and comments #48, 59, 66 say that the workaround doesn't fix T420 thinkpads as well. It appears to be a different bug.
Un-marking duplicate:
Bug #773524 is fixed for all users except T420 Thinkpads.
It doesn't work for me, and comments #48, 59, 66 say that the workaround doesn't fix T420 thinkpads as well. It appears to be a different bug.