Crash when enabling/disabling various Compiz plugins and that Unity plugin is enabled

I can't reproduce the crasher with the tip of the trunk. Can you get a coredump?

D'oh! It seems I forgot to enable the "Rotate Cube" plugin - starting with both plugins enabled works for me.

Enabling or disabling plugins while Unity is running seems to crash Compiz. This is true for at least "Desktop Cube", "Rotate Cube", "Negative", "Opacity", and "Opacity, Brightness, and Saturation". All crash with the same backtrace from above.

Hey all,

just need to check if this a dl related bug - can you try to unload the unity plugin first, then load cube and rotate, and then reload the unity plugin and see if it crashes then?

Unloading Unity doesn't remove panel + launcher, enabling "Desktop Cube" does, enabling "Rotate Cube" works, re-enabling Unity then crashes Compiz.

Starting Compiz with all three disabled, enabling "Desktop Cube", "Rotate Cube", and "Unity" in that order works.

Sam, can you please make us more robust to being added/removed. Add new bugs for individual components if needed (i.e. if Nux is keeping state around)

Yes, I should have been more descriptive. What release number is Unity currently at? I know it's 3.x, but other than that I have no clue.

Hernando: According to your backtrace, apparently now we know what's causing the crash: Somewhere in the Unity code, something is causing Compiz to experience a segmentation fault when enabling/disabling plugins. I would think it would be the fact that Unity's code conflicts with code with the other plugins in such a way as to trigger a SIGSEGV in Compiz.

On Mon, Dec 13, 2010 at 11:27 AM, ks64 <email address hidden> wrote:
> Hernando: According to your backtrace, apparently now we know what's
> causing the crash: Somewhere in the Unity code, something is causing
> Compiz to experience a segmentation fault when enabling/disabling
> plugins. I would think it would be the fact that Unity's code conflicts
> with code with the other plugins in such a way as to trigger a SIGSEGV
> in Compiz.
>

Known issue, it is because the unity plugin does not disconnect some
signals and these cause sigc to freak out when the unity plugin gets
re-inited.

> --
> You received this bug notification because you are a member of Unity
> Team, which is subscribed to unity in ubuntu.
> https://bugs.launchpad.net/bugs/682499
>
> Title:
>  Crash when enabling/disabling various Compiz plugins and that Unity plugin is enabled
>
> Status in Unity:
>  Triaged
> Status in “unity” package in Ubuntu:
>  Triaged
>
> Bug description:
>  Binary package hint: unity
>
> Trying to start Compiz with both Unity and Desktop Cube enabled causes Compiz to crash and leave me with no window manager.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 11.04
> Package: unity 3.2.0-0ubuntu3
> ProcVersionSignature: Ubuntu 2.6.37-6.17-generic 2.6.37-rc3
> Uname: Linux 2.6.37-6-generic i686
> Architecture: i386
> CompizPlugins: No value set for `/apps/compiz/general/allscreens/options/active_plugins'
> Date: Sun Nov 28 14:37:40 2010
> GconfCompiz:
>  /apps/compiz/general:
>   /apps/compiz/general/screen0:
>    /apps/compiz/general/screen0/options:
>     vsize = 1
>     hsize = 4
> InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101127)
> InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101127)
> MachineType: Acer AOA110
> PciDisplay: 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GME Express Integrated Graphics Controller [8086:27ae] (rev 03) (prog-if 00 [VGA controller])
> ProcEnviron:
>  LANG=en_US.utf8
>  SHELL=/bin/bash
> ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.37-6-generic root=UUID=73e56a44-6013-4742-a230-b273e2a21784 ro quiet splash
> ProcVersionSignature_: Ubuntu 2.6.37-6.17-generic 2.6.37-rc3
> RelatedPackageVersions:
>  xserver-xorg 1:7.5+6ubuntu3b1
>  libgl1-mesa-glx 7.9+repack-1ubuntu2
>  libdrm2 2.4.22-2ubuntu1
>  xserver-xorg-video-intel 2:2.13.0-1ubuntu1
>  xserver-xorg-video-ati 1:6.13.2-1ubuntu2
> SourcePackage: unity
> XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
> dmi.bios.date: 10/06/2008
> dmi.bios.vendor: Acer
> dmi.bios.version: v0.3309
> dmi.board.asset.tag: Base Board Asset Tag
> dmi.board.vendor: Acer
> dmi.board.version: Base Board Version
> dmi.chassis.type: 1
> dmi.chassis.vendor: Chassis Manufacturer
> dmi.chassis.version: Chassis Version
> dmi.modalias: dmi:bvnAcer:bvrv0.3309:bd10/06/2008:svnAcer:pnAOA110:pvr1:rvnAcer:rn:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
> dmi.product.name: AOA110
> dmi.product.version: 1
> dmi.sys.vendor: Acer
> glxinfo: Error: [Errno 2] No such file or directory
> system: distro = Ubuntu, architecture = i686, kernel = 2.6.37-6-generic
>
>
>

--
Sam Spilsbury

Seeing as though Unity 3.2.8 has been released, has this bug been fixed yet?

Not sure that the plugin has been cleaned up to behave more properly, so moving that bug to 3.2.12

Sam, we can turn that into a bitesize bug i guess, if you point a contributor to a good plugin example for wiring the signals properly.

Unity 3.4 has been released; has this bug been fixed yet? I don't want another delay.

This is a complicated issue for a small usecase, we are prioritizing other issues in the implementation above it for now.

This bug was reported *before* Bug 685552, so why didn't Bug 685552 be marked a duplicate of this?

The other bug has a lot more information at this point and a lot more duplicates. We duplicate based on whichever bug has the most information at the time.