Ubuntu
unity package

running compiz in Xephyr kills compiz

Bug #740972 reported by Scott Moser
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Unity
Invalid
Low
Unassigned
compiz (Ubuntu)
Expired
Low
Unassigned
unity (Ubuntu)
Expired
Low
Unassigned

Bug Description

Binary package hint: unity

I was using Xephyr and caused my external-to-xephyr compiz-decorator to crash. This is 100% reproducible

1.) log into unity deskop
2.) run: Xephyr :8 &
3.) run: DISPLAY=:8 compiz
4.) the windows will flash as compiz-decorator that was running dies

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.6.6-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-7.38-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
Date: Wed Mar 23 09:06:16 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
InstallationMedia_: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature_: Ubuntu 2.6.38-7.38-generic 2.6.38
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2010-11-15 (127 days ago)
---
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: None
DRM.card0.DP.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.DP.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.DP.3:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1440x900 1440x900
 edid-base64: AP///////wAwrjNAAAAAAAASAQOAHhN46q4QllhTjCgkUFQAAAABAQEBAQEBAQEBAQEBAQEB2CegiFGEGjAwIDYAML4QAAAZhCGgoFGEGjAwIDYAML4QAAAZAAAADwCQCjKQCigUAQAyDAEBAAAA/gBMUDE0MVdQMS1UTEI4ADw=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DistUpgraded: Log time: 2010-11-15 15:19:11.183891
DistroCodename: natty
DistroRelease: Ubuntu 11.04
DistroVariant: ubuntu
DkmsStatus:
 virtualbox-ose, 4.0.4, 2.6.38-7-generic, x86_64: installed
 virtualbox-ose, 4.0.4, 2.6.38-6-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:20e4]
   Subsystem: Lenovo Device [17aa:20e4]
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
InstallationMedia_: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
InstallationMedia__: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
MachineType: LENOVO 7417CTO
Package: unity 3.6.8-0ubuntu3
PackageArchitecture: amd64
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=36286167-4eba-4a1e-a202-155c6baafa01 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
ProcVersionSignature_: Ubuntu 2.6.38-7.39-generic 2.6.38
ProcVersionSignature__: Ubuntu 2.6.38-7.39-generic 2.6.38
Renderer: Unknown
Tags: unity-2d natty running-unity unity-2d natty running-unity ubuntu unity-2d natty running-unity
Uname: Linux 2.6.38-7-generic x86_64
UpgradeStatus: Upgraded to natty on 2010-11-15 (134 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare sbuild
dmi.bios.date: 04/17/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7UET70WW (3.00 )
dmi.board.name: 7417CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7UET70WW(3.00):bd04/17/2009:svnLENOVO:pn7417CTO:pvrThinkPadT400:rvnLENOVO:rn7417CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7417CTO
dmi.product.version: ThinkPad T400
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4git20110322-0ubuntu5
version.libdrm2: libdrm2 2.4.23-1ubuntu5
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

See original description
Revision history for this message
Scott Moser (smoser) wrote :
Revision history for this message
Mirco Müller (macslow) wrote :

Scott, can you provide a stack-trace for this crash? This will make debugging the issue a lot easier!

Changed in unity:
status: New → Incomplete
Changed in unity (Ubuntu):
status: New → Incomplete
Scott Moser (smoser)
description: updated
Revision history for this message
Scott Moser (smoser) wrote :

This bug is (at least for me) trivial to recreate. Have you tried ?

I quickly tried to get a backtrace, but didn't get one. It seems that the compiz process doesn't crash.

Basically, there are 2 compiz process in play, one with DISPLAY=:0, then, later, one with DISPLAY=:8.

The second one makes the first exit, and then exits itself. The session then falls back to metacity as the window manager.

summary: - running compiz in Xephyr crashes compiz
+ running compiz in Xephyr kills compiz
Changed in unity (Ubuntu):
status: Incomplete → New
Changed in unity:
status: Incomplete → New
Revision history for this message
Scott Moser (smoser) wrote :

If you try to run compiz on DISPLAY=:0 while one is already running, it gives a message like:
$ compiz
compiz (core) - Error: Screen 0 on display ":0" already has a window manager; try using the --replace option to replace the current window manager.

That makes sense.

However, if you launch Xephyr, and then run compiz with DISPLAY=:8 (that of xephyr), it ends up making the compiz that was running on :0 exit.

This also happens if the window manager on :0 was metacity.

Revision history for this message
Sebastien Bacher (seb128) wrote :

does it make the decorator crash or compiz crash? if that's only the decorator the title is misleading and that seems similar to bug #730495

Alex Launi (alexlauni)
Changed in unity:
status: New → Incomplete
Changed in unity (Ubuntu):
status: New → Incomplete
Alex Launi (alexlauni)
Changed in compiz (Ubuntu):
status: New → Incomplete
Changed in unity (Ubuntu):
importance: Undecided → Low
Changed in unity:
importance: Undecided → Low
Changed in compiz (Ubuntu):
importance: Undecided → Low
Revision history for this message
Scott Moser (smoser) wrote : BootDmesg.txt

apport information

tags: added: apport-collected ubuntu unity-2d
description: updated
Revision history for this message
Scott Moser (smoser) wrote : CurrentDmesg.txt

apport information

Revision history for this message
Scott Moser (smoser) wrote : Dependencies.txt

apport information

Revision history for this message
Scott Moser (smoser) wrote : GconfCompiz.txt

apport information

Revision history for this message
Scott Moser (smoser) wrote : Lspci.txt

apport information

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Scott Moser (smoser) wrote : Lsusb.txt

apport information

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Scott Moser (smoser) wrote : ProcCpuinfo.txt

apport information

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Scott Moser (smoser) wrote : ProcInterrupts.txt

apport information

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Scott Moser (smoser) wrote : ProcModules.txt

apport information

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Scott Moser (smoser) wrote : UdevDb.txt

apport information

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Scott Moser (smoser) wrote : UdevLog.txt

apport information

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Scott Moser (smoser) wrote : UnitySupportTest.txt

apport information

Revision history for this message
Scott Moser (smoser) wrote : XorgLog.txt

apport information

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Scott Moser (smoser) wrote : XorgLogOld.txt

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Scott Moser (smoser) wrote : Xrandr.txt

apport information

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Scott Moser (smoser) wrote : monitors.xml.txt

apport information

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Scott Moser (smoser) wrote : peripherals.txt

apport information

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Scott Moser (smoser) wrote : xdpyinfo.txt

apport information

Changed in unity (Ubuntu):
status: Incomplete → New
Revision history for this message
Scott Moser (smoser) wrote :

I'm personally not aware what portion of compiz or unity failed. i would suggest you try to reproduce the bug and see for yourself. To give you some bit of information, I did:
$ Xephyr :8
$ ps axww | sort > /tmp/out.1
$ DISPLAY=:8 compiz
$ ps axww | sort > /tmp/out.2
$ diff /tmp/out.1 /tmp/out.2

Cleaning the un-related differences, I see:
- 1644 tty8 Ss+ 0:11 /usr/bin/X :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-4XTgXB/database -nolisten tcp
+ 1644 tty8 Rs+ 0:14 /usr/bin/X :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-4XTgXB/database -nolisten tcp
- 2082 ? Sl 0:04 compiz
+ 4148 ? Ss 0:00 /bin/sh -c gnome-panel
+ 4149 ? Ss 0:00 /bin/sh -c metacity --replace
+ 4150 ? Sl 0:00 gnome-panel
+ 4151 ? Sl 0:00 metacity --replace
+ 4168 ? Ssl 0:00 /usr/lib/bonobo-activation/bonobo-activation-server --ac-activate --ior-output-fd=27
+ 4180 ? Sl 0:00 /usr/lib/gnome-panel/wnck-applet
+ 4182 ? Sl 0:00 /usr/lib/gnome-applets/cpufreq-applet
+ 4184 ? Sl 0:00 /usr/lib/gnome-applets/multiload-applet-2
+ 4186 ? Sl 0:00 /usr/lib/indicator-applet/indicator-applet-complete

In this case, the gnome-panel got launched on compiz exit. Previously, I don't think it had. So thats why the additional panel related processes.

Changed in compiz (Ubuntu):
status: Incomplete → New
Omer Akram (om26er)
Changed in unity:
status: Incomplete → New
Revision history for this message
Alex Launi (alexlauni) wrote :

actually i don't get any crash. can you start unity with unity --advanced-debug from tty1 to start it in gdb, and then run xephyr so it crashes unity on :0, can you provide the trace?

Changed in unity (Ubuntu):
status: New → Incomplete
Changed in compiz (Ubuntu):
status: New → Incomplete
Changed in unity:
status: New → Incomplete
Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for compiz (Ubuntu) because there has been no activity for 60 days.]

Changed in compiz (Ubuntu):
status: Incomplete → Expired
Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]

Changed in unity (Ubuntu):
status: Incomplete → Expired
Omer Akram (om26er)
Changed in unity:
status: Incomplete → Invalid
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