[Bug 48353] No networking after the gdm theme is changed several times

[Malcolm81]

Public bug reported:

Binary package hint: gdm

I dist-upgraded from Breezy to Dapper. A few days later, I used gdmsetup
to change the GDM login theme. I tried several of them, then settled for
one called CleanLinux, which I downloaded using gnome-art.

After a reboot, there was no networking anymore ("network is
unreachable" was the error message). I couldn't access/ping the router,
the router couldn't see this computer online, and I got the same results
from another computer connected to the LAN at the same time. Using some
tools (network-admin, ifconfig) I checked if something was wrong with my
settings. Nothing was, so I didn't change anything. The last move I
tried was to change the GDM theme back to the default Human theme. After
a reboot, everything worked.

I was able to reproduce this bug. Changing the theme only once didn't
cause any problems, networking was okay after the reboot.

But after changing the theme several times (4 or 5 times: change theme,
close gdmsetup, open it again, change theme and so on), logging in and
out to try it, and then rebooting, I was left with no networking once
more. Again, changing back to the Human theme, and rebooting again,
fixed it.

** Affects: gdm (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

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No networking after the gdm theme is changed several times
https://launchpad.net/bugs/48353