This affects me too. I have a Radeon HD 7970/8970 OEM / R9 280X and the display is a Samsung U28D590D. Using an HDMI cable works perfectly. Using DisplayPort makes the display be disconnected when light-locker kicks in. I have to manually reconfigure the display until it shows me images again. I do notice that the display receives some sort of signal when I active my computer. But it shows no image and then goes back to idle.
I have a seconday monitor connected via DVI and that monitor keeps working perfectly. -- 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
