Logout from a switched account fails to revert

[4listair]

Having upgraded from 7.10 to 8.04 alpha-4 via 'update-manager -d', the following is reproduceable:
 - from a administrator account, create an unprivileged guest account.
 - switch into the guest account (via the top, right shut-down icon) but not logging out of the admin account.
 - now log out from the guest account.
 - system does not return to a login screen, nor to the admin account but remains at a light-beige background (default scheme running), with no dialog options. The mouse pointer is visible and responds to mouse movement but no other actions are possible and no key sequences seem to recover anything.
 - a power-cycle is required to recover.

[Michael Nagel (nailor)]

is this reproducable with the latest released versions?

[4listair (alistair-alistairlang)]

Hi Michael

I now have 8.04 LTS plus latest updates on two machines. One still had the
problem but the other didn't. With a little testing, I have identified
there is NO problem on both machines with the following setting:

Appearance Preferences - Visual Effects - None

To experience the problem requires setting:
Appearance Preferences - Visual Effects - Normal
or
Appearance Preferences - Visual Effects - Extra

Both PCs are running the latest apt-get Nvidia OEM driver 169.12 and
the latest 2.6.24-18-generic kernel.

The blank screen seen after logout from the guest account is now white
and recovery is via ctrl_alt_bkspace which kills the original login
session also, so is not a work-around. At least no re-boot is
required.

Cheers
Alistair

[Michael Nagel (nailor)]

i file this bug against compiz as it seems somehow related to the selected window manager...

[Chris Coulson (chrisccoulson)]

The white screen issue is bug 160264.

Thanks