Comment 5 for bug 807306

Hi,
  Here are the contents of my history.log - there were quite a few things that got updated - I'd also installed the -dbgsym for the xserver just before which updated the xserver-xorg-core package:

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Start-Date: 2011-07-08 01:09:34
Commandline: apt-get install xserver-xorg-core-dbgsym
Install: xserver-xorg-core-dbgsym:i386 (1.10.2.902-1ubuntu1)
Upgrade: xserver-common:i386 (1.10.2-1ubuntu1, 1.10.2.902-1ubuntu1), xserver-xorg-core:i386 (1.10.2-1ubuntu1, 1.10.2.902-1ubuntu1)
End-Date: 2011-07-08 01:09:39

Start-Date: 2011-07-08 01:20:41
Commandline: apt-get dist-upgrade
Install: libglapi-mesa:i386 (7.11~1-0ubuntu3, automatic), thunderbird-globalmenu:i386 (5.0+build1+nobinonly-0ubuntu4, automatic), libmtp9:i386 (1.1.0-2ubuntu1, automatic), linux-headers-3.0-3:i386 (3.0-3.4, automatic), libdbusmenu-glib4:i386 (0.4.90-0ubuntu3, automatic), thunderbird:i386 (5.0+build1+nobinonly-0ubuntu4), thunderbird-gnome-support:i386 (5.0+build1+nobinonly-0ubuntu4), accountsservice:i386 (0.6.12-3, automatic), libdbusmenu-gtk3-4:i386 (0.4.90-0ubuntu3, automatic), linux-headers-3.0-3-generic:i386 (3.0-3.4, automatic), linux-image-3.0-3-generic:i386 (3.0-3.4), libgnome-desktop-3-2:i386 (3.1.3-0ubuntu1, automatic), libgbm1:i386 (7.11~1-0ubuntu3, automatic), libaccountsservice0:i386 (0.6.12-3, automatic), libdbusmenu-gtk4:i386 (0.4.90-0ubuntu3, automatic), indicator-sound-gtk2:i386 (0.7.2-0ubuntu1, automatic), libmtp-runtime:i386 (1.1.0-2ubuntu1, automatic), libopenvg1-mesa:i386 (7.11~1-0ubuntu3, automatic)

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In terms of udev messages, in the dmesg I did notice:

[ 9.407077] udevd[245]: starting version 171
.....
[ 9.512717] init: udev-fallback-graphics main process (306) terminated with status 1