mumble hangs trying to connect

[Tom Haddon]

When trying to connect to a server Mumble consistent hangs. strace reports "sched_yield() = 0" repeated over and over.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: mumble 1.2.8-2ubuntu1
Uname: Linux 4.2.0-040200rc3-generic i686
ApportVersion: 2.19.1-0ubuntu5
Architecture: i386
CurrentDesktop: Unity
Date: Mon Nov 23 15:32:40 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2011-10-04 (1511 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110921.2)
SourcePackage: mumble
UpgradeStatus: Upgraded to wily on 2015-11-19 (3 days ago)

[Chris Knadle (chris-knadle)]

"sched_yield() = 0". Huh. 0 is what's returned on success.

   http://linux.die.net/man/2/sched_yield

Seems related to threading. The mumble source code doesn't contain this call, so it's probably something being called by the Qt4 library.

The best thing I can suggest at the moment for trying to track this down further is to install the mumble-dbg package and to run mumble via a debugger like gdb. It'll give you a lot of confusing output but it's the best chance of figuring out what is making the sched_yield() call and/or what else is going wrong. When it gets stuck, see if you can get a "backtrace" and report the output to the bug.

Thanks.

[Tom Haddon (mthaddon)]

I suspect this is related to Bug #1520812 which I just filed