Thinkpads Forum

I've been using Linux on ThinkPads for years (mainly Red Hat/Fedora) and never had this problem.

Now, with Ubuntu on my tablet, when I hit Fn+End the screen goes blank, and there doesn't seem to be a way to get the display back. Is there some workaround for this? I know I will hit the buttons without thinking about it since I've done it for many years. I never had to actively install/configure anything for those buttons to work on other ThinkPads and other Linux installs.

Found an answer:

http://andrey.thedotcommune.com/thinkpad_t60.html#4 :

The first problem I noticed was that the screen brightness adjustment buttons (Fn+home and Fn+end) did not work correcly: the screen would turn off when they were pressed. This turned out to be a bug related to the "video" module. This module can simply be blacklisted and the buttons will then work after a reboot. Add the following line to your /etc/modprobe.d/blacklist file to blacklist "video":

blacklist video