Public bug reported: Potentially related: http://askubuntu.com/questions/546818/displayport-monitor-not-detected-if-switched-off-and-on-again https://bugs.freedesktop.org/show_bug.cgi?id=88063 http://superuser.com/questions/945362/displayport-link-failure-after-monitor-sleep
I have three monitors plugged into an ATI HD 7950, one through DVI, the others through DisplayPort, via dual-link adapters. When KDE puts the monitors to sleep, only the DVI monitor wakes up, not the DisplayPort monitors. xrandr shows all three monitors on. xset dpms force on does not work. Using xrandr to change the resolution and change it back does not work. Logging out and logging back in does not work. Trying to switch to CLI with shift-alt-f1, I see a console, but it shows the bootlog (on the DVI monitor), without a login prompt. Trying to log out and log back in, lightdm behaves as though the other two monitors are on, but only displays on the DVI. ** Affects: xserver-xorg-video-ati (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/1538221 Title: Monitors on DisplayPort do not wake from sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1538221/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp