<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - AMD 7470m When VGA plugged into laptop, only one monitor working at a time" href="https://bugs.freedesktop.org/show_bug.cgi?id=99784#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - AMD 7470m When VGA plugged into laptop, only one monitor working at a time" href="https://bugs.freedesktop.org/show_bug.cgi?id=99784">bug 99784</a> from <a class="email" href="mailto:vbalaban@usc.edu" title="Valeriu Balaban <vbalaban@usc.edu>"> Valeriu Balaban</a> <pre>Created <a href="attachment.cgi?id=131429" name="attach_131429" title="Output of xrandr and dmesg">attachment 131429</a> <a href="attachment.cgi?id=131429&action=edit" title="Output of xrandr and dmesg">[details]</a> Output of xrandr and dmesg I have the same issue on Ubuntu 16.04 LTS with Mate desktop that runs on an iMac 11. The second monitor is connected through a Display Port to VGA adapter and the kernel selects it to be primary by default. After a fresh boot, since the second monitor is the primary one it contains the login screen, however the screen is black. So I have to unplug it to make the internal monitor (eDP) primary. If I plug again the external one, the internal monitor turns black and the external becomes active and starts to display it's content. If I take a screenshot, I can see what is displayed on both monitors.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>