Comment 22 for bug 573557

Installing the proprietary driver with patch, everything works normally.
Installing the nvidia-current package, install goes OK, but trying to start kde results in the "login loop" -- the greeter comes up, login, the splash screen starts, then jumps back to the greeter. Note that this does NOT happen with the proprietary patched driver.
1. .Xauthority and .ICEauthority are both owned by the appropriate user.
2. Moving .kde out of the way does not solve the problem -- same behavior.
3. Gnome works normally, compositing in gnome works normally.
4. tail of /var/log/kdm.log:
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X.Org X Server 1.7.6
Release Date: 2010-03-17
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-27-server x86_64 Ubuntu
Current Operating System: Linux Wolfenstein 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010 x86_64
Kernel command line: BOOT_IMAGE=/vmlinuz root=UUID=d3568e88-de4b-4e77-99f9-ea6e9547516d ro nomodeset
Build Date: 23 April 2010 05:11:46PM
xorg-server 2:1.7.6-2ubuntu7 (Bryce Harrington <email address hidden>)
Current version of pixman: 0.16.4
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue May 4 14:23:55 2010
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using config directory: "/usr/lib/X11/xorg.conf.d"
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory
QFileSystemWatcher: failed to add paths: /tmp/1346053230/.config/ibus/bus
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory
QFileSystemWatcher: failed to add paths: /tmp/0459924307/.config/ibus/bus
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
kdmgreet: Fatal IO error: client killed
 ddxSigGiveUp: Closing log
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Since the proprietary patched driver works normally, and the nvidia-current does not, this suggests there is still some problem with the nvidia-current driver. Sorry, jockey does not work on my system, it just gives a blank screen. So I must use apt-get install nvidia-current. Also I cannot do a "clean" install -- the boot CDs all crash, including alternate cds (separate issue - bug report filed).