Comment 39 for bug 447692

same behaviour here too
10.04LTS 2.6.32-74-generic #142-Ubuntu SMP Tue Apr 28 10:03:02 UTC 2015 x86_64 GNU/Linux
I'm pretty sure VT's worked but i have some time to use them
i did logged in blindly(without see the screen because its black )

ps -ef
...
root 26736 1 0 13:45 tty1 00:00:00 /bin/login --

who
harrykar tty7 2015-08-20 10:21 (:0)
harrykar pts/1 2015-08-20 10:22 (:0.0)
but VT's screen remains black

so all work fine and is only a visualization problem