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I did a fresh install of ubuntu 16.04 on my old dell computer in which
there is an ati radeon X1300 graphics card.
Whenever the screen turns off due to inactivity, it cannot be woken up
by moving the mouse or by hitting a key.
When I kill the Xorg process via ssh with another computer, the screen
then comes to life again and I can log back in.
When I remove the graphic card from the computer and use the built in
graphic card instead, the bug doesn't occur. So I guess it is related to
the radeon driver.
Oddly enough, there is no problem waking the screen when I type "xset
-display :0.0 dpms force off" in a terminal. Moreover typing gnome-
screensaver-command -a in a terminal turns my screen off and after
typing this line, the screen can be woken up by moving the mouse or by
hitting a key. I'm confused.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: bot-comment patch xenial
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screen cannot be turned back on after being switched off after some time of
inactivity
https://bugs.launchpad.net/bugs/1577170
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