OK. That's a third point of proof that you're not running XMir. You have an interlaced mode "1920x1080i" which is not possible with Mir. So this can't be a Mir or XMir bug.
The X log files say it's "radeon" misdetecting the display size. So I'll reassign the bug to that... [ 21.327] (II) RADEON(0): clock: 27.0 MHz Image Size: 160 x 90 mm ** Also affects: xserver-xorg-video-ati (Ubuntu) Importance: Undecided Status: New ** Changed in: mir Status: Incomplete => Invalid ** Changed in: xmir Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1383397 Title: Desktop PC detected as Phablet To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1383397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs