On archlinux up-to-date (linux 4.12.12), I hit the same problem on the following hardware :
- AMD HD5850 - Benq GW2765HE (DP 1.2) Solutions I've tried : - Disabling/enabling DDC/CI - Disabling/enabling DP Auto Switch (Benq-specific feature I suppose) - Downgrading to DP 1.1 on the screen What worked for me is to load the kernel with radeon.audio=0 as per : https://wiki.archlinux.org/index.php/ATI#DisplayPort_stays_black_on_multimonitor_mode -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1313539 Title: [DisplayPort] monitor shows black screen and "no input signal" after turning the monitor off and on manually To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1313539/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
