Krzysztof, you don't have to downgrade the kernel. This is only necessary with the open-source Intel drivers.
I'm not sure if AMD drivers support Displayport 1.2 MST feature, but I know that NVIDIA drivers do support it and it does not require anything special about the kernel. Please browse your drivers documentation or AMD support site and find out how to enable (if possible) multi-display support using DP MST. -- 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
