Hi,

I used to suffer from a regression in hardy: I would often get a beep, lose (as in X server reset) my gnome session (without all gnome infrastructure programs being killed, quite interestingly)

I performed an upgrade (I'm usually upgrading every dozen days or so) on last sundayy. That seems to have improved vastly over the previous state of affairs. Fwiw, the packages likely relevant to the issue have been upgraded as follow:

initramfs-tools     0.85eubuntu36      -> 0.85eubuntu39.1
pciutils            1:2.2.4-1.1ubuntu3 -> 1:2.2.4-1.1ubuntu4
libgnome-desktop-2  1:2.22.2-0ubuntu2  -> 1:2.22.2-0ubuntu3
deskbar-applet      2.22.1-0ubuntu1    -> 2.22.2.1-0ubuntu1
pm-utils            0.99.2-3ubuntu9    -> 0.99.2-3ubuntu10
xserver-xorg-core   2:1.4.1~git20080131-1ubuntu9 -> 2:1.4.1~git20080131-1ubuntu9.2

Other most likely irrelevant changes:

xserver-xorg-video-cirrus 1:1.1.0-8 -> 1:1.1.0-8ubuntu1
xserver-xorg-video-intel  2:2.2.1-1ubuntu13 -> 2:2.2.1-1ubuntu13.4

 (I use nvidia binaries)

apache2             2.2.8-1ubuntu0.1        -> 2.2.8-1ubuntu0.2
apache2-mpm-prefork 2.2.8-1ubuntu0.1        -> 2.2.8-1ubuntu0.2
apache2-utils       2.2.8-1ubuntu0.1        -> 2.2.8-1ubuntu0.2
apache2.2-common    2.2.8-1ubuntu0.1        -> 2.2.8-1ubuntu0.2
cpp                 4:4.2.3-1ubuntu5        -> 4:4.2.3-1ubuntu6
g++                   4:4.2.3-1ubuntu5      ->  4:4.2.3-1ubuntu6
gcc                   4:4.2.3-1ubuntu5      ->  4:4.2.3-1ubuntu6) ...
gnome-about           1:2.22.2-0ubuntu2     ->  1:2.22.2-0ubuntu3
gnome-cards-data      1:2.22.1.1-0ubuntu3   ->  1:2.22.2.1-0ubuntu1
gnome-desktop-data    1:2.22.2-0ubuntu2     ->  1:2.22.2-0ubuntu3
gnome-games           1:2.22.1.1-0ubuntu3   ->  1:2.22.2.1-0ubuntu1
gnome-games-data      1:2.22.1.1-0ubuntu3   ->  1:2.22.2.1-0ubuntu1
libgksu2-0            2.0.5-1ubuntu5        ->  2.0.5-1ubuntu5.1
libldap-2.4-2         2.4.7-6ubuntu4.1      ->  2.4.7-6ubuntu4.2
libldap2-dev          2.4.7-6ubuntu4.1      ->  2.4.7-6ubuntu4.2
liblircclient0        0.8.3~pre1-0ubuntu7   ->  0.8.3~pre1-0ubuntu7.1
libnspr4-0d           4.7.1~beta2-0ubuntu1  ->  4.7.1+1.9-0ubuntu0.8.04.1
libnss3-1d            3.12.0~beta3-0ubuntu1 ->  3.12.0.2+1.9-0ubuntu0.8.04.1
libpam-smbpass        3.0.28a-1ubuntu4      ->  3.0.28a-1ubuntu4.1
libparted1.7-1        1.7.1-5.1ubuntu9      ->  1.7.1-5.1ubuntu9.1
libsmbclient          3.0.28a-1ubuntu4      ->  3.0.28a-1ubuntu4.1
libsmbclient-dev      3.0.28a-1ubuntu4      ->  3.0.28a-1ubuntu4.1
parted                1.7.1-5.1ubuntu9      ->  1.7.1-5.1ubuntu9.1
python-launchpad-bugs 0.2.30                ->  0.2.30.1
samba                 3.0.28a-1ubuntu4      ->  3.0.28a-1ubuntu4.1
samba-common          3.0.28a-1ubuntu4      ->  3.0.28a-1ubuntu4.1
smbclient             3.0.28a-1ubuntu4      ->  3.0.28a-1ubuntu4.1
smbfs                 3.0.28a-1ubuntu4      ->  3.0.28a-1ubuntu4.1
ufw                   0.16.2                ->  0.16.2.1
yelp                  2.22.1-0ubuntu2       ->  2.22.1-0ubuntu2.8.04.1

firefox             3.0~b5+nobinonly-0ubuntu3 -> 3.0~rc1+nobinonly-0ubuntu0.8.04.1
firefox-3.0         3.0~b5+nobinonly-0ubuntu3 -> 3.0~rc1+nobinonly-0ubuntu0.8.04.1
firefox-3.0-dom-inspector 3.0~b5+nobinonly-0ubuntu3 -> 3.0~rc1+nobinonly-0ubuntu0.8.04.1
firefox-3.0-gnome-support 3.0~b5+nobinonly-0ubuntu3 -> 3.0~rc1+nobinonly-0ubuntu0.8.04.1
firefox-3.0-venkman 3.0~b5+nobinonly-0ubuntu3 -> 3.0~rc1+nobinonly-0ubuntu0.8.04.1
firefox-dom-inspector 3.0~b5+nobinonly-0ubuntu3 -> 3.0~rc1+nobinonly-0ubuntu0.8.04.1
firefox-gnome-support 3.0~b5+nobinonly-0ubuntu3 -> 3.0~rc1+nobinonly-0ubuntu0.8.04.1
xulrunner-1.9         1.9~b5+nobinonly-0ubuntu4~8.04.0mt1 -> 1.9~rc1+nobinonly-0ubuntu1~8.04.2
xulrunner-1.9-dom-inspector 1.9~b5+nobinonly-0ubuntu4~8.04.0mt1 -> 1.9~rc1+nobinonly-0ubuntu1~8.04.2
xulrunner-1.9-gnome-support 1.9~b5+nobinonly-0ubuntu4~8.04.0mt1 -> 1.9~rc1+nobinonly-0ubuntu1~8.04.2
xulrunner-1.9-venkman 1.9~b5+nobinonly-0ubuntu4~8.04.0mt1 -> 1.9~rc1+nobinonly-0ubuntu1~8.04.2

Hope this helps