Package: x2goserver Version: 4.0.1.15 Severity: normal The problem appears to be that the current version of source & binary package "gnome-session", 3.12.1-3 (in both jessie and sid), checks for hardware 3D acceleration even when launching GNOME flashback session, which does not require acceleration. There is probably also a problem with the composite extension not being available (or not being new enough.) x2goserver will probably need to pass an argument like "--disable-acceleration-check" to gnome-session, once that argument is implemented by gnome-session. So I figured I'd report this bug against x2goserver. GNOME bug: https://bugzilla.gnome.org/show_bug.cgi?id=731173 Corresponding Ubuntu bug: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1251281 Debian bug: Couldn't find one Mike#1, how do you propose we word this bug in the Debian BTS? Do you want me to submit it or, should you? You are a DD after all. BTW, the current version of gnome-session-flashback (source package: gnome-panel) is: jessie: 3.8.1-1 sid: 3.8.1-2 -Mike#2