** Description changed:
- 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 3.8+ enforces usage of 3D, breaking usage of all gnome-
+ session based sessions in non-3D accelerated hardware and environments
+ as plat X, VNC and NX/X2GO. This makes usage of gnome-flashback
+ impossible.
+
+ Overriding 3D checks (sym-linking
/usr/lib/gnome-session/gnome-session-check-* to /bin/true) enables sessions
start but gnome-session segfault few seconds later.
+
+ (Sorry for hijacking this bug, but new gnome-session behavior has much
broader affect then originally reported)
+
+ Original report:
+
+ 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.
** Changed in: gnome-session (Ubuntu)
Status: New = Confirmed
** Summary changed:
- gnome-session is broken without 3d acceleration, breaking gnome-flashback on
X, VNC and NX/X2GO
+ gnome-session is broken without 3d acceleration, breaking also
gnome-flashback on X, VNC and NX/X2GO
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https://bugs.launchpad.net/bugs/1274013
Title:
gnome-session is broken without 3d acceleration, breaking also gnome-
flashback on X, VNC and NX/X2GO
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