I had this problem too, sporadically, for a very long time. Recently it
got quite a bit worse with a new release of fglrx, so I undertook to
solve it. What was happening for me is that the X server used the dpms
settings specified in the ServerFlags section (BlankTime, etc.) of
xorg.conf to put the display to sleep after 10 minutes, then when KDE's
power management daemon tried to put the display to sleep after 20
minutes, it caused some kind of race condition in the X server and
required a reboot.
My solution was to *add* the following to the ServerFlags section of my
xorg.conf:
Option "BlankTime" "0"
Option "StandbyTime" "0"
Option "SuspendTime" "0"
Option "OffTime" "0"
to turn off xset's dpms handling entirely, and leave it up to KDE to
blank the display. Note that all four values default to 600 (ten
minutes) if they're not specified! (My feeling is that as long as KDE
and GNOME are set to handle display blanking by default in the
distribution, then the above values should ship with the default
xorg.conf.)
I hope this helps anyone else with this problem. For the OP: you might
want to dispable display dimming as well in case fglrx can only handle
one kind of power saving request at a time.
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to fglrx-installer in Ubuntu.
https://bugs.launchpad.net/bugs/958279
Title:
FGLRX DPMS support totally broken, fails to wake up the monitor after
putting it to sleep.
To manage notifications about this bug go to:
https://bugs.launchpad.net/fglrx/+bug/958279/+subscriptions
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