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(SOLVED) Glxgears root vs not as root
  • sanger440sanger440 January 2011
    I have stable v3 running on a P4 desktop with a ATI radeon 9600 video card.  I followed the wiki and I believe I have the video drivers installed and working properly.  However, if I run glxgears -info as root, I get a real high fps (2000 fps).  If I run glxgears - info as tux (user) my fps is like 180.  I have added tux in the video group, add drm module to load at boot, everything in the wiki.  I installed from the command line as root.

    as root  glxinfo | grep render   yields  direct rendering: yes   Opengl render string: Mesa Dri 300 200060815 AGP 4x....


    as Tux  glxinfo | grep render   yields  direct rendering: yes   Opengl render string: Software Rasterizer

    Can anyone confirm if this is normal or should glxgears run fast as tux user also.

    Charlie.
  • Trixar_zaTrixar_za January 2011
    SliTaz defaults to using Software rendering with OpenGL, which is probably why you see the huge number difference between the root and tux results.

    This is a common issue with SliTaz, but it is fixable since there are people that have gotten the latest cooking to use direct hardware rendering like it should - I tried searching for the link, but it didn't come up - this forum needs a better search function :P
  • mojomojo January 2011
    @sanger440
    Verify tux is member of video group.
    tux@slitaz: cat /etc/group
    If not
    root@slitaz: addgroup tux video
    Reboot
    Post output from this:
    tux@slitaz: LIBGL_DEBUG=verbose glxinfo | grep render





  • sanger440sanger440 January 2011
    I have addgroup tux video a couple of times
    cat /etc/group  shows  video:x:8:tux

    tux@slitaz: LIBGL_DEBUG=verbose glxinfo | grep render   shows libGL: OpenDriver:  urs/lib/dri/r300_dri.so
    drmOpenDevice: open result is -1, (permission denied)

    Pretty new to linux, how do I cut and past from an xterm or where is the log file I can open tocut and paste from?

    Thanks.
  • Trixar_zaTrixar_za January 2011
    You could try using sakura as your terminal instead of xterm. You can copy and paste from it more easily.
  • sanger440sanger440 January 2011
    Section "DRI"
         Mode 0666
    EndSection

    Load  "drm"


    I added the above to my xorg.conf file and now glxgears works in user (tux) mode.  glxgears -info now over 2500fps.
    This may be the first time in linux I got a 3d driver installed and working right!

    How do I mark this thread as SOLVED?

  • mojomojo January 2011 
    @sanger440

    Permissions on /dev/dri/card0 root:root so tux can't open.

    Add udev rule below will change /dev/dri/card0 root:video

    tux as a member of group video will then be able to open device. 

    You can use leafpad as root if you prefer instead of nano.

    root@slitaz: nano -B /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
  • sanger440sanger440 January 2011
    Thanks Mojo

    I went ahead and did your fix too.  All seems to work

    Charlie
  • Trixar_zaTrixar_za January 2011
    If you want to change the title, go to your first post and click edit. You should be able to change the title of the topic now :P
  • kultexkultex January 2011
    just as a reminder - this works in stable, but not in cooking
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