I can't seem to reproduce any such issue with Mir demo servers or Xmir. Old clients including Xmir work just fine when run against Mir 0.23 and lp:mir for me.
Admittedly I haven't tested the critical combination of Mir 0.23 + Unity8. I expect you have too many variables though. When you upgraded to Mir 0.23.0 you probably also upgraded Unity8, QtMir etc. There's no telling which project contains the bug... -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1584784 Title: 0.23 xapps need interaction to start in pocket-desktop Status in Mir: In Progress Status in Mir 0.23 series: In Progress Status in Mir 0.24 series: In Progress Status in QtMir: New Status in mir package in Ubuntu: New Status in qtmir package in Ubuntu: New Status in xorg-server package in Ubuntu: Invalid Bug description: in 0.23 the xapps need some interaction to get the applications to start. 0.23 is blocked pending fix. To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1584784/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp