New information : typing "xset -display :0.0 dpms force off" in the terminal makes my screen to turn off. Then I can wake it up just by moving the mouse. So the problem seems related to the "screen saver" of ubuntu rather than Xorg.
** Package changed: xorg (Ubuntu) => gnome-screensaver (Ubuntu) ** Description changed: I did a fresh install off ubuntu 16.04 on my old dell computer in which there is an ati radeon X1300 graphics card. - Whenever the screen goes off due to inactivity, it cannot be woken up + Whenever the screen goes off due to inactivity, it cannot be woken up by moving the mouse or hit a key. The same ubuntu 16.04 installed on a laptop with intel graphics card - doesn't show this problem, so I guess it is related to the radeon - driver. + doesn't show this problem, so I first guessed it was related to the + radeon driver. But as there is no problem waking the screen when I type + "xset -display :0.0 dpms force off" in a terminal, I think the problem + is rather related to gnome-screensaver. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1577170 Title: screen cannot be turned back on after being switched off after some time of inactivity Status in gnome-screensaver package in Ubuntu: New Bug description: I did a fresh install off ubuntu 16.04 on my old dell computer in which there is an ati radeon X1300 graphics card. Whenever the screen goes off due to inactivity, it cannot be woken up by moving the mouse or hit a key. The same ubuntu 16.04 installed on a laptop with intel graphics card doesn't show this problem, so I first guessed it was related to the radeon driver. But as there is no problem waking the screen when I type "xset -display :0.0 dpms force off" in a terminal, I think the problem is rather related to gnome-screensaver. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1577170/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
