Ubuntu
gnome-session package

  1. Bug #1274013
  2. Comment #0

Comment 0 for bug 1274013

Revision history for this message
Martin Meredith (mez) wrote : gdm fails to start without 3d acceleration

In Saucy Salamander, gdm will not start if 3d acceleration is not available. This throws an error to /var/log/gdm/:0-greeter.log

gnome-session-is-accelerated: No composite extension.
gnome-session-check-accelerated: Helper exited with code 256
gnome-session-is-accelerated: No composite extension.
gnome-session-check-accelerated: Helper exited with code 256
** (process:4142): WARNING **: software acceleration check failed: Child process exited with code 1

This is a regression from raring, and is the same if gnome-fallback is unavailable.

Possibly the same bug as #1251281, as this shows the same error.

This is preventing me from upgrading to raring, as I run 4 screens on an Nvidia Quadro NVS 450, meaning 3d is unavailable.