Comment 17 for bug 421660

The nexus7 issue is fixed (update-notifier does not pop up gksu anymore but uses pkexec which is usable with onboard).

While gksu is still broken in this regard (so leaving that bug task open) and xdiagnose still uses it (leaving that open as well) you will not get into a situation on the nexus7 where xdiagnose runs (and even if ... you wouldnt have any input method at all)

For the nexus7 i consider this issue solved (we will solve it harder by dropping gksu from the default install though)