Update: Due a lot of testing, my best speculate is, that the Thinkpad pro dock 90 w acts as MST-DP Hub ( Display Port 1.2 Hub ) After Docking the Kernel renames DP Ports, this is needed in use with real DP 1.2 Displays. But from then ( docked in ) the resume code in DRM is not longer working ( it works if the displays are attached directly to the laptop ). So the resume bug should be somewhere in the Intel DRM / MST-DP code.
After all i found some easy workaround ( not with xrandr, cause it dont works with more the one external display ) and updated https://sys4.de/de/blog/2016/03/09/external-displays-thinkpad-pro-dock-90w-stay-switched-after-resume/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1555078 Title: external displays thinkpad pro dock 90w stay switched after resume To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1555078/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
