*** This bug is a duplicate of bug 1251281 ***
https://bugs.launchpad.net/bugs/1251281
** This bug has been marked a duplicate of bug 1251281
gnome-flashback (without effects) fails to start without hardware
acceleration
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https://bugs.launchpad.net/bugs/1274013
Title:
gnome-session is broken without 3d acceleration, breaking gnome-
flashback on non-3D H/W and cloud environments (Forwarded-X, VNC and
NX/X2GO)
Status in “gnome-session” package in Ubuntu:
Confirmed
Bug description:
Gnome-Session 3.8+ enforces usage of 3D, breaking usage of all gnome-
session based sessions in non-3D accelerated environments as non-3D
enabled hardware, forwarded-X, VNC and NX/X2GO.
This breaks gnome-flashback, breaking upgrade path from previous LTS
and removing most sane option for cloud environments!
Overriding 3D checks (sym-linking /usr/lib/gnome-session/gnome-
session-check-* to /bin/true) allows to start the session but it fails
few seconds later when gnome-session segfault without apparent reason.
(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.
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