<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Monitor not turning on after DisplayPort re-plug in Xorg" href="https://bugs.freedesktop.org/show_bug.cgi?id=46711#c23">Comment # 23</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Monitor not turning on after DisplayPort re-plug in Xorg" href="https://bugs.freedesktop.org/show_bug.cgi?id=46711">bug 46711</a> from <a class="email" href="mailto:bugs.freedesktop.org@pobox.madduck.net" title="martin f. krafft <bugs.freedesktop.org@pobox.madduck.net>"> martin f. krafft</a> <pre>I am also seeing this problem on Debian Sid with a new Radeon R9 390 card and two Samsung monitors connected with DisplayPort. The third monitor on DVI works just fine. Here's the card: 06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Hawaii PRO [Radeon R9 290] (rev 80) Kernel is version 4.4.0 (amd64) X.org is version 7.7 Radeon driver is version 7.6.1 Restarting X.org does *not* turn the monitors/displays on. They are in a really weird state: not flashing as to indicate power-saving, but completely blank/dark, and I can't even call up the OSD menu. The only way to get these displays to work is to disconnect the DP cable, turn them off and on, and then connect the DP cable again. Here is abridged xrandr output: Screen 0: minimum 320 x 200, current 5888 x 1152, maximum 16384 x 16384 DisplayPort-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm 1920x1080 60.00*+ 59.94 […] DisplayPort-1 connected 1920x1080+3968+0 (normal left inverted right x axis y axis) 477mm x 268mm 1920x1080 60.00*+ 59.94 […] DisplayPort-2 disconnected (normal left inverted right x axis y axis) HDMI-0 disconnected (normal left inverted right x axis y axis) DVI-0 connected primary 2048x1152+1920+0 (normal left inverted right x axis y axis) 510mm x 287mm 1920x1080 60.00 + 50.00 59.94 2048x1152 59.91*+ […]</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>