Re: [gentoo-user] gentoo on compiz problems

[Nilesh Govindrajan <contact@nileshgr.com>]

On Fri, Mar 16, 2012 at 3:00 PM, Tamer Higazi <th982a@googlemail.com> wrote:
> Hi!
> I am running a stable port of gentoo with gnome 2.31.1 and I want to run
> compiz.
>
> How do I run compiz proparly?! I am pretty sure, that I do something
> wrong. For any advise, I would thank you.
>
>
> Tamer
>
>
>
> When I open gnome-terminal (shell) and run "compiz-manager" I get the
> following output:
>
>
> tamer@office ~ $ compiz-manager
> Checking for Xgl: not present.
> xset q doesn't reveal the location of the log file. Using fallback
> /var/log/Xorg.0.log
> Detected PCI ID for VGA: 04:00.0 0300: 10de:1244 (rev a1) (prog-if 00
> [VGA controller])
> Checking for texture_from_pixmap: present.
> Checking for non power of two support: present.
> Checking for Composite extension: present.
> NVIDIA: could not open the device file /dev/nvidiactl (Permission denied).
> Comparing resolution (1920x1080) to maximum 3D texture size (16384): Passed.
> Checking for nVidia: present.
> Checking for FBConfig: NVIDIA: could not open the device file
> /dev/nvidiactl (Permission denied).
> present.
> Checking for Xgl: not present.
> Starting emerald
> NVIDIA: could not open the device file /dev/nvidiactl (Permission denied).
>
>
>

I think you need to be present in the video group.
Clearly the problem is because access is denied to your video card.
Just ls -l /dev/nvidiactl (you should see group video there) and add
yourself to the group.

gpasswd -a <your username> video

If the group is something else as the ls -l reveals, add yourself to
that group (unless it's root or wheel). If the group is root or wheel,
you need to modify udev/mdev rules which I'm not aware of much.

-- 
Nilesh Govindarajan
http://nileshgr.com