Unity8 crashes with SIGSEGV in qtmir::MirSurface::onCloseTimedOut () at ./src/modules/Unity/Application/mirsurface.cpp:917

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding unity8. This problem was most recently seen with package version 8.15+17.04.20161116.1-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/ded3a210b92755ec7de56b1bb4097103984eb123 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.

[Daniel van Vugt (vanvugt)]

The stack seems to mention QLightDM and Greeter too.

[kevin gunn (kgunn72)]

we may want to reduce this to medium, if this isn't going to directly effect u8 on classic desktop for a while

[Albert Astals Cid (aacid)]

Is this "fixed" ?

If you look at https://errors.ubuntu.com/problem/ded3a210b92755ec7de56b1bb4097103984eb123 all the "new" reports are either from 15.04+armhf (i.e phone) running an "old" version (20161114) or amd64 also running an "old" version (20160922).

The first one i can find that is "new-ish" is
December 27, 2016 using 8.15+17.04.20161207.1-0ubuntu1

So maybe we have fixed it since and that's why no other 17.04 version crash has happened?

[Brian Murray (brian-murray)]

It certainly looks like but if it is fixed it'd be good to get that fix in 16.10 which still seems affected by the bug.

[Daniel van Vugt (vanvugt)]

Are we maintaining Unity8 on 16.10 at all?

Unity8 for yakkety is 5 months out of date. I thought we were developing for 17.04 only...?

[Daniel van Vugt (vanvugt)]

Incomplete. This crash hasn't been seen on zesty since unity8 8.15+17.04.20161207.1-0ubuntu1

[Brian Murray (brian-murray)]

On Wed, Mar 22, 2017 at 02:20:15AM -0000, Daniel van Vugt wrote:
> Are we maintaining Unity8 on 16.10 at all?

It's in the official archive of Ubuntu so that implies that it should be
maintained. If it wasn't something being maintained then it should be in
a PPA.

--
Brian Murray

[Daniel van Vugt (vanvugt)]

I agree in general. However from a practical point of view we don't have the resources to keep yakkety up to date with the latest development, and it's also an inappropriate thing to do for a stable release anyway.

Unity8 was still too feature-incomplete in yakkety so it's unrealistic to expect all future development to get backported to it. Even bug fixes. It's so incomplete in yakkety that just fixing a crash or two doesn't really help people.

[Michał Sawicz (saviq)]

Yeah I agree, especially since this would require us dig through what actually caused this fix.