SliTaz Forum

rustysmoove

I have a Compaq Evo D310v with i82865g on-board video. I installed mesa, mesa-dri, mesa-dri-intel, xorg-x86-video-intel and linux-agp then rebooted. when i do glxinfo | grep render as tux i get back software rasterizer if i do it as root i get back opengl renderer string Mesa DRI Intel 845g. so as user no hardware accel for games. root works no problem for games.

I then did # addgroup tux video and restarted. same deal though. no user hardware acel.

I then did LIBGL_DEBUG=verbose glxinfo | grep render. which led me to the file /dev/dri card0 cannot open. so I checked permissions and only root has them for that file.

so I changed permissions with pcmanfm as root to allow user read+write permission then restarted . same deal no accel went back to folder no permission again

so I did chmod 666 /dev/dri/card0. restarted, still no permission after restart.
Works great for user as long as I don't restart.

Then I tried adding sudo chmod 666 /dev/dri/card0 to rcS.conf file to run at boot. but it says it
cannot find the file.

I'm at a loss as to how to make the change stick without having to pcmanfm or chmod it at every startup.
ANY IDEAS
thanks

mojo

This is another part of slitaz that needs fine tuning.
When card0 is created by system it should be a member of video group not root group.
Then all regulars users who are member of video group could open card0.
Because it's part of root group tux has to be part of root group to open it.
Personally I am not obsessed with security,adding new users,and spending hours trying to get things to work on slitaz that I know are broken.
I addgroup tux root so tux can open /dev/dri/card0

rustysmoove

well that sounds like it would work but security goes out the window. there has to be a better way.

mojo

root@slitaz: nano /etc/udev/rules.d/50-udev-default.rules

Add whats in bold:


# graphics
KERNEL=="agpgart",              MODE="0600", GROUP="video"
KERNEL=="pmu",                  GROUP="video"
KERNEL=="nvidia*|nvidiactl*",   GROUP="video"
KERNEL=="card[0-9]*",   NAME="dri/%k", GROUP="video"
SUBSYSTEM=="graphics",          GROUP="video"
SUBSYSTEM=="drm",               GROUP="video"

Reboot

tux@slitaz:~$ ls -l /dev/dri/card0
crw-rw----    1 root    video    226,   0 Oct 11 00:06 /dev/dri/card0

rustysmoove

thanks for the help mojo I will give it a try

kultex

to add tux to the group root is not a very good idea

the problem is described here:

http://doc.slitaz.org/en:guides:xorg-xvesa

in the section DRI / DRM Problem

you just have to do as root

# rm /dev/dri
# mkdir /dev/dri/

and it should work without problem

mojo

Thanks kultex for prompting me to review the guide.
http://doc.slitaz.org/en:guides:xorg-xvesa

There was a different solution already posted there.

If you have DRI/DRM enabled, it may be easier to change its permission so all users can use it, rather than adding each to the video group. Append the following section:

Add to /etc/Xll/xorg.conf

Section "DRI"
        Mode 0666
EndSection

Reboot

tux@slitaz:~$ ls -l /dev/dri/card0 
crw-rw-rw-    1 root     root     226,   0 Oct 12 13:05 /dev/dri/card0

rustysmoove

I did the
# rm /dev/dri
# mkdir /dev/dri/

and only root had read+write permissions

kultex

very strange - and you use stable or cooking?

rustysmoove

stable 3.0

kultex

thx rustysmoove and mojo

sorry, that I was not reading carefully - you solved something, where jozee and I gave up - see here: http://forum.slitaz.org/index.php/discussion/1069 - quite the end of the thread

@mojo you could ad this to the guide

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