For Ubuntu 11.10 “forgot admin password” issue, try the following (at your own risk)
At GRUB, choose Recovery Mode, then root.
If you get "Authentication token manipulation error", do:
mount -o remount,rw /
And then use the
Fedora 16 automatically dims the laptop screen after a short period of inactivity. This period of inactivity appears to default to 10 seconds–which can be an unsettlingly short time.
To increase the Fedora 16 screen brightness timer, the following Terminal commands are relevant:
Check Fedora 16 screen brightness dimming timer (value in seconds):
gsettings get org.gnome.settings-daemon.plugins.power idle-dim-time
SET Fedora 16 screen brightness dimming timer (value in seconds):
gsettings set org.gnome.settings-daemon.plugins.power idle-dim-time TIME_SECONDS
where TIME_SECONDS is your desired dimming timer.
-e.g. perhaps 60 seconds is a more useful time to you, so type in Terminal:
gsettings set org.gnome.settings-daemon.plugins.power idle-dim-time 60