Sorry, we should have noticed this earlier... It appears you have a buggy monitor which reports itself as 16x9cm in size when plugged in to HDMI. So that's why Unity8 thinks it's a tablet. Although you also mention in comment #5 that if you connect using DVI then the dimensions are reported correctly. So you should use DVI as a workaround if you can.
So we have a hardware bug in the physical monitor, and a software bug in Unity8. Unity8 is incorrectly assuming that a 16x9cm display must be a tablet. Actually we can correct this assumption by noticing it's connected by HDMI and therefore is not a tablet display. ** Package changed: xserver-xorg-video-ati (Ubuntu) => unity8 (Ubuntu) ** Changed in: mir Status: Incomplete => Invalid ** Changed in: unity8 (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp