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General Trouble Shooting
DRI Users Guide
: General Trouble Shooting
Previous: Using 3D Acceleration
Next: Hardware-Specific Information and Troubleshooting
7. General Trouble Shooting
This section contains information to help you diagnose general
problems.
See below for additional information for specific hardware.
7.1. Starting the X server
- Before you start the X server, verify the appropriate 3D kernel
module is installed.
Type
lsmod
and look for the appropriate kernel module.
For 3dfx hardware you should see tdfx
, for example.
- Verify you're running XFree86 4.0 and not an older version.
If you run
xdpyinfo
and look for the following line near
the top:
vendor release number: 4000
- Verify that your XF86Config file (usually found at
/etc/X11/XF86Config) loads the glx and dri modules and
has a DRI section.
See the Software Resources section below for sample
XF86Config files.
- Examine the messages printed during X server startup and check
that the DRM module loaded.
Using the Voodoo3 as an example:
(==) TDFX(0): Write-combining range (0xf0000000,0x2000000)
(II) TDFX(0): Textures Memory 7.93 MB
(0): [drm] created "tdfx" driver at busid "PCI:1:0:0"
(0): [drm] added 4096 byte SAREA at 0xc65dd000
(0): [drm] mapped SAREA 0xc65dd000 to 0x40013000
(0): [drm] framebuffer handle = 0xf0000000
(0): [drm] added 1 reserved context for kernel
(II) TDFX(0): [drm] Registers = 0xfc000000
(II) TDFX(0): visual configs initialized
(II) TDFX(0): Using XFree86 Acceleration Architecture (XAA)
Screen to screen bit blits
Solid filled rectangles
8x8 mono pattern filled rectangles
Indirect CPU to Screen color expansion
Solid Lines
Dashed Lines
Offscreen Pixmaps
Driver provided NonTEGlyphRenderer replacement
Setting up tile and stipple cache:
10 128x128 slots
(==) TDFX(0): Backing store disabled
(==) TDFX(0): Silken mouse enabled
(0): X context handle = 0x00000001
(0): [drm] installed DRM signal handler
(0): [DRI] installation complete
(II) TDFX(0): direct rendering enabled
- After the X server has started, verify that the required X server
extensions are loaded.
Run
xdpyinfo
and look for the following entries in the
extensions list:
GLX
SGI-GLX
XFree86-DRI
7.2. Linking, running and verifying 3D acceleration
After you've verified that the X server and DRI have started
correctly it's time to verify that the GL library and hardware
drivers are working correctly.
- Verify that you're using the correct libGL.so library with
ldd
.
The /usr/lib and /usr/X11R6/lib directories are expected
locations for libGL.so.
Example:
% ldd /usr/local/bin/glxinfo
libglut.so.3 => /usr/local/lib/libglut.so.3 (0x40019000)
libGLU.so.1 => /usr/local/lib/libGLU.so.1 (0x40051000)
libGL.so.1 => /usr/lib/libGL.so.1 (0x40076000)
libXmu.so.6 => /usr/X11R6/lib/libXmu.so.6 (0x402ee000)
libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0x40301000)
libm.so.6 => /lib/libm.so.6 (0x40309000)
libc.so.6 => /lib/libc.so.6 (0x40325000)
libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x40419000)
libXt.so.6 => /usr/X11R6/lib/libXt.so.6 (0x404bd000)
libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0x40509000)
libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0x40512000)
libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x40529000)
libvga.so.1 => /usr/lib/libvga.so.1 (0x40537000)
libpthread.so.0 => /lib/libpthread.so.0 (0x4057d000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
- You may also double check that libGL.so is in fact DRI-capable.
Run
strings libGL.so.1.2 | grep DRI
and look for
symbols prefixed with "XF86DRI", such as "XF86DRIQueryExtension".
- To be safe one should run
ldconfig
after installing libGL.so
to be sure the runtime loader will find the proper library.
- Verify that the appropriate 3D driver is in
/usr/X11R6/lib/modules/dri/
For example, the 3dfx driver will be named
tdfx_dri.so
.
- Set the
LIBGL_DEBUG
environment variable.
This will cause libGL.so to print an error message if it fails
to load a DRI driver.
Any error message printed should be self-explanatory.
- Run
glxinfo
. Note the line labeled "OpenGL renderer string".
It should have a value which starts with "Mesa DRI" followed by
the name of your hardware.
- Older Linux OpenGL applications may have been linked against
Mesa's GL library and will not automatically use libGL.so.
In some cases, making symbolic links from the Mesa GL library
to libGL.so.1 will solve the problem:
ln -s libGL.so.1 libMesaGL.so.3
In other cases, the application will have to be relinked
against the new XFree86 libGL.so.
It is reported that part of the problem is that running
ldconfig
will silently rewrite symbolic links based
on the SONAME field in libraries.
If you're still having trouble, look in the next section for
information specific to your graphics card.
DRI Users Guide
: General Trouble Shooting
Previous: Using 3D Acceleration
Next: Hardware-Specific Information and Troubleshooting
Static
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Static
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Static
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