Comment 21 for bug 48936

Ok I went on a bit of a goose-chase just to eliminate as many sources of confusion as possible. The wacom thing appears to be irrelevant to this problem. As far as I can figure out, the wacom input drivers are in xorg.conf by default simply so that X on a tablet works nicely out of the box. Commenting out these sections from xorg.conf has no effect (i.e. the greeter still crashes).

So it seems that the greeter is asking X via AIGLX to change the screen resolution, which fails. My screen goes through 3 attempts to set the screen (I get a brief orange-brown background and a spinning mouse cursor for about half a second each time) before it gives up with the error message.

The fall-back greeter appears to work fine.

Assuming my theorising above is correct, I wonder if it is one of those combination errors - i.e. the combination of Xorg 7.1, AIGLX and my particular graphics chipset (ATI Radeon Xpress 200M) whilst fine in other combinations is causing an error in this case.

As noted above, I did not have this problem in dapper, only since upgrading to edgy (in about November), and no combination of edgy xorg updates, different drivers (OSS radeon, several different versions of fglrx, vesa) or xorg.conf configuration has so far succeeded in preventing the greeter from crashing.

See attached /var/log/gdm/:0.log

Any help would be nice... :-) In the meantime, if I get time I might have a trawl through the greeter code to see what is going on (depending on what language it's written in!!!)

Cheers,
Jonathan