Comment 69 for bug 51991

The freeze after 30/60 minutes of inactivity might be a different problem, caused by the 'console-tools'-package. I ran into this problem with several multiseat-systems a year ago already. It turned out, that mouse and keyboard were still active, only the monitor wouldn't wake up again. You just have to work blindly - for example you're still able to log out as long as you know the keyboard-shortcuts to do so.

Our solution is the following:

Edit /etc/console-tools/config and change these two entries:

# screen blanking timeout. monitor remains on, but the screen is cleared to
# range: 0-60 min (0==never) kernels I've looked at default to 10 minutes.
# (see linux/drivers/char/console.c)
#BLANK_TIME=30
BLANK_TIME=0

# Powerdown time. The console will go to DPMS Off mode POWERDOWN_TIME
# minutes _after_ blanking. (POWERDOWN_TIME + BLANK_TIME after the last input)
#POWERDOWN_TIME=30
POWERDOWN_TIME=0