Dell Latitude 131L - crash when resuming after suspend

hi
I'm running Karmic amd64 on a Dell Latitude 131L, updated at least twice a day.
Unfortunately the suspend/resume is (still) broken. Last time I tried it I closed all apps before choosing 'suspend' in the logout / shutdown menu. I didn't even try just to close the lid.
The suspending appears to work fine, but after opening the lid the screen stays black and the system seems to hang. I get no response from either mouse, keys or power button.
This leaves no other option than to lean on the power button until the system does a hard reboot.

I've uploaded several crash reports on this one, but can't find them now, so I'm making a new bug report.
After the last crash Apport started a report, but quit with the message that 'linux kernel 2.6.31-14-generic is not a generic ubuntu package'
This is strange. Either the latest kernel version is not branded right, or Apport itself has a new bug.

Any more information you might need, just ask, but my command line skills are quite rusty now and never were very good in unix anyway.

cheers
Tom