I've been trying to solve what looks like this issue on our platform also. It happens consistently on a laptop with a VGA monitor connected, if I undock and close the lid (which suspends to memory), and then dock and open the lid. After looking at various state information I see this:
xrandr thinks the monitor is attached and enabled putting in a bunch of debug code into the driver it looks like while the system is resuming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/911045 Title: [GM45] xrandr does not enable external display after suspend/resume cycle To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911045/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
