[Mageia-dev] Problem with gdm metacity again

Wed Sep 7 11:42:33 CEST 2011

On Wed, 7 Sep 2011 11:15:21 +0200
+JA Magallon <jamagallon at ono.com> wrote:
+
+> Hi...
+> 
+> This old problem has surfaced again:
+> 
+> .xsession-errors:
+> 
+> ...
+> Window manager warning: Screen 0 on display ":0" already has a window manager; try using the --replace option to replace the current window manager.
+> Window manager warning: Screen 0 on display ":0" already has a window manager; try using the --replace option to replace the current window manager.
+> ...
+> 
+> I get only the nautilus desktop, with two black bars on top and bottom of the screen.
+> If I launch a terminal, 'gnome-shell --replace' works fine.
+> 
+> Any idea ?
+> Can it be some personal setting ?
+> 
+> TIA
+
+Digging a bit more, something is wrong detecting acceleration.
+In GDM log:
+
+gnome-session[4752]: DEBUG(+): fill: *** Looking if /usr/share/gnome-session/sessions/gdm-shell.session is a valid session file
+gnome-session[4752]: DEBUG(+): fill: *** Launching helper 'bash -c "gnome-shell --help | grep -q gdm-mode && /usr/lib64/gnome-session-check-accelerated"' to know if session is runnable
+gnome-session-is-accelerated: No hardware 3D support.
+gnome-session-check-accelerated: Helper exited with code 256
+gnome-session[4752]: WARNING: Session 'gdm-shell' runnable check failed: Exited with code 1
+gnome-session[4752]: DEBUG(+): fill: *** Session is not runnable
+gnome-session[4752]: DEBUG(+): fill: *** Getting session 'gdm-fallback'
+
+This is for GDM's own session.
+The same happens for user.
+
+Any ideas ? How can I check why this fails ?
+Its a netbook with Intel graphics, so it uses Mesa.
+
+Will check on an nvidia system too.
+
+TIA
+