Sorry Krzysztof, this bug is dedicated only to supporting Intel VGAs, so none of the packages here would solve your problem.
Since you use the proprietary AMD drivers you should examine the features their driver support and follow their instructions. Sorry, I have missed the AMD VGA part in the log you pasted. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1104230 Title: DisplayPort 1.2 MST support is missing in the Intel driver To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1104230/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs