Turns out we were experiencing this bug in Unity8, particularly with GTK apps. Just that QtMir will freeze on the last frame and stretch it instead of showing a black window like Mir's compositor does. Also enough GTK windows open smaller than 480x480 by default to have actually worked despite the bug. See bug 1649662 and other duplicates.
-- 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/1663062 Title: [regression] Software clients of nested servers with size >=480x480 are all black in Mir 0.25.0 and later (or stretched and distorted under Unity8) Status in Canonical System Image: Fix Committed Status in Mir: In Progress Status in Mir 0.25 series: Won't Fix Status in Mir 0.26 series: Fix Committed Status in mesa package in Ubuntu: Invalid Status in mir package in Ubuntu: Triaged Bug description: GPU apps seem to work. CPU apps all get black screen. To repro : Under unity7 using mir-on-x: 1- In a terminal, run : mir_demo_server -f /tmp/mysock 2- In another terminal, run : mir_demo_server --host-socket /tmp/mysock 3- In another terminal, run : mir_demo_client_progressbar Under Unity8 : In another terminal, run : mir_demo_client_progressbar Observe that, the window is black. Whereas, egl clients run fine. To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1663062/+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
