Public bug reported:
My story is as follows. I understand that you probably do not support
using the official NVIDIA drivers, but it seems that people upgrading
from Feisty without any graphics drivers at all could possibly get stuck
in the same position as me.
First, I installed Feisty.
I needed to get the latest version of NVIDIA drivers, so I disabled the ones
from restricted-manager (or else I might have entirely uninstalled the
restricted-manager) and installed the latest drivers from nvidia.com, using
their "nvidia-installer" utility.
Everything worked fine... at some point I might have enabled Desktop Effects in
gnome... I don't remember if I disabled them again because I switched to KDE
primarily. I also know that the default on Gutsy is now to have Compiz enabled
so I suspect this wouldn't have mattered.
I dist-upgraded to Gutsy using update-manager -d.
X11 (gdm) failed to start because a new version of the X server was installed.
I solved this by reinstalling the NVIDIA drivers with nvidia-installer (they
were the same version).
I selected Gnome from the login screen.
Compiz starts, and all the pretty effects work (except I don't see the cube).
The first time around it crashed when switching desktops but this solved itself
after a Ctrl-Alt-Backspace and logging into GNOME again.
I decided I want to disable the wobbly effects, enable the cube, or disable
Compiz altogether, so I go into System->Preferences->Desktop Effects. It asks
me for a password (which is new... it used to just be a simple settings dialog)
However, instead of opening the simple window like it did in Feisty, it pops up
a window saying "Enable the NVIDIA Accelerated Graphics Driver".
I don't want to install Ubuntu's NVIDIA driver because that would either mean
possibly breaking a working system configuration or else downgrading to an
older version, both of which I don't want, as I would like the flexibility to
keep an up-to-date NVIDIA driver.
Is there a way to get into the Desktop Effects manager because I know I already
have NVIDIA drivers installed? I understand that it could be a bad idea for
people to accidentally enable this without the right drivers, so it
But it ought to check for the condition where Compiz is on by default and then
can't be turned off...
Maybe rather than restricting it where you enable/disable the feature, have it
detect whether it actually works or not... for example, use the output of
"glxinfo" to determine whether you have the right drivers installed? Or check
if it crashes X then the next time around turn it off and tell the user how to
re-enable compiz.
Also, what about someone who has a really old graphics card, and then installs
the NVIDIA drivers from restricted-manager, and then manages to get into the
Desktop Effects window even though compiz won't work?
I'm going to try completely uninstalling restricted-manager to see if
that solves the problem, and I'll report back.
** Affects: ubuntu
Importance: Undecided
Status: New
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Can't disable Desktop Effects after dist-upgrade to gutsy
https://bugs.launchpad.net/bugs/153497
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