Correction to the initial report: this was separate from the i915 problems that halts the system. Although it looks the same, in this case the system is still running, so gdm can be restarted using ssh from another computer.
The i915 problem turned out to be a required kernel parameter i915.enable_rc6=0 without which mouse cursor changes will randomly halt the system. mutter has lots of flickering and freeze risk in the magic area 40 px into an external display bordering the hidpi one. bugs. I went back to X that now actually works for multiple-display. I’ll try Wayland again for 3.24 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1647084 Title: i915 multiple display halt system when moving windows To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1647084/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
