Almost all system get freezed a few seconds everytime

[Javier Melero]

I'm not sure where comes this issue from, but I think this is notify-osd related (or maybe dbus related) because this is what happen:
After start ubuntu, and run a few apps (Opera, pidgin, empathy, evolution, netbeans, etc), sometimes almost all apps get freezed for 10~15 seconds, and then they continue to running normally.

This do not happen to all apps, for example, Opera and netbeans doesn't get freezed, but it happens with nautilus, pidgin, empathy, evolution, eog, chromium.

This commonly happen when there is some notification queued, this notification is not showed, then almost all apps freezes a moment, and inmediately after the notification is showed, all get back to normal. The most frecuent case is when somebody sends to me an instant message, as this event generates a notification, everything get freeze a while.

This doesn't happen everytime for every notification, but it happens almost 15~20 times per hour, and is very irritating.
I've reading a lot, but I couldn't solve this or even confirm where is the problem.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: notify-osd 0.9.30-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia wl
Architecture: amd64
Date: Tue Sep 6 16:18:52 2011
ExecutablePath: /usr/lib/notify-osd/notify-osd
GtkTheme: Ambiance
IconTheme: Faenza-Darkest
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Dell Inc. Vostro 1320
ProcEnviron:
 LANGUAGE=es_AR:en
 PATH=(custom, user)
 LANG=es_AR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=7f3388d2-4070-4473-a12b-968bf45808d1 ro quiet splash nomodeset video=uvesafb:mode_option=1280x800-24,mtrr=3,scroll=ywrap
RelatedPackageVersions:
 xserver-xorg 1:7.6+4ubuntu3.1
 libgl1-mesa-glx 7.10.2-0ubuntu2
 libdrm2 2.4.23-1ubuntu6
 xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
 xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
SourcePackage: notify-osd
UpgradeStatus: Upgraded to natty on 2011-07-09 (59 days ago)
WindowManager: gnome-wm
XsessionErrors:
 (<unknown>:1996): Bonobo-WARNING **: Bonobo must be initialized before use
 (nm-applet:2033): libappindicator-WARNING **: Unable to connect to the Notification Watcher: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name :1.85 was not provided by any .service files
dmi.bios.date: 03/05/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0R235J
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd03/05/2010:svnDellInc.:pnVostro1320:pvrNull:rvnDellInc.:rn0R235J:rvr:cvnDellInc.:ct8:cvrN/A:
dmi.product.name: Vostro 1320
dmi.product.version: Null
dmi.sys.vendor: Dell Inc.

[Javier Melero (ricmelero)]

I've forgot to say a few things, compiz doesn't freeze, it continues running without problems, I can switch between windows, show desktop, etc.
Another thing is the Messaging menu, when all get freezed, the menu is still working, but show an empty line (under empathy or under pidgin section, depending on what program generates the notification) with an empty bubble on the right end. Once the notification is showed, this line show the right info.