[vtkusers] Re: extension "GLX" missing on display (vtkXOpenGLRenderWindow (0x805fe00): Could not find a decent visual)

Sun Apr 3 07:16:08 EDT 2005

Hi Clinton:

> 
> Try the "vesa" driver instead of the "vga" driver.
> You can do opengl with the vesa driver and it works with lots of cards.

actually, as it turns out i was editing the wrong XF86Config file :-( when i check my X startup messages i saw that it was using:

/etc/X11/XF86Config

and i was editing:

/etc/XF86Config

i was using the correct (s3virge) driver and uncommenting Load "glx" worked fine! i don't even know what that other file was doing there... i guess it was detritus from when i first configured X (i'm pretty new to the UNIX world ;-)

anyway, thanks for the response. as embarrassing as it is to to admit to such a dumb error, i've posted this to the list in the hope that someone else who winds up in the same situation may find it useful!!

cheers

iain

> Clint
> 
>>
>> Message: 5
>> Date: Sat, 02 Apr 2005 14:51:11 +0000
>> From: Iain Dooley <mail at iaindooley.com>
>> Subject: [vtkusers] extension "GLX" missing on display
>>     (vtkXOpenGLRenderWindow (0x805fe00): Could not find a decent visual)
>> To: vtkusers at vtk.org
>> Message-ID: <424EB15F.4010607 at iaindooley.com>
>> Content-Type: text/plain; charset=us-ascii; format=flowed
>>
>> hi there,
>>
>> i'm running:
>>
>> FreeBSD 4.10-STABLE FreeBSD 4.10-STABLE #0: Wed Jun 23 01:36:48 GMT 2004
>>
>> i use XFree86. i successfully built the C++ test app for VTK, and when 
>> i run it, i get:
>>
>> Xlib:  extension "GLX" missing on display ":0.0".
>> Xlib:  extension "GLX" missing on display ":0.0".
>> ERROR: In 
>> /usr/home/iain/dist/vtk/VTKFiles/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, 
>> line 219
>> vtkXOpenGLRenderWindow (0x805fe00): Could not find a decent visual
>>
>>
>> Xlib:  extension "GLX" missing on display ":0.0".
>> Xlib:  extension "GLX" missing on display ":0.0".
>> ERROR: In 
>> /usr/home/iain/dist/vtk/VTKFiles/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, 
>> line 219
>> vtkXOpenGLRenderWindow (0x805fe00): Could not find a decent visual
>>
>>
>> Xlib:  extension "GLX" missing on display ":0.0".
>> Xlib:  extension "GLX" missing on display ":0.0".
>> ERROR: In 
>> /usr/home/iain/dist/vtk/VTKFiles/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, 
>> line 219
>> vtkXOpenGLRenderWindow (0x805fe00): Could not find a decent visual
>>
>>
>> X Error of failed request:  BadColor (invalid Colormap parameter)
>>  Major opcode of failed request:  84 (X_AllocColor)
>>  Resource id in failed request:  0x0
>>  Serial number of failed request:  18
>>  Current serial number in output stream:  18
>>
>> the result of xdpyinfo is:
>>
>> iain at piper> xdpyinfo
>> name of display:    :0.0
>> version number:    11.0
>> vendor string:    The XFree86 Project, Inc
>> vendor release number:    40300000
>> XFree86 version: 4.3.0
>> maximum request size:  4194300 bytes
>> motion buffer size:  256
>> bitmap unit, bit order, padding:    32, LSBFirst, 32
>> image byte order:    LSBFirst
>> number of supported pixmap formats:    7
>> supported pixmap formats:
>>    depth 1, bits_per_pixel 1, scanline_pad 32
>>    depth 4, bits_per_pixel 8, scanline_pad 32
>>    depth 8, bits_per_pixel 8, scanline_pad 32
>>    depth 15, bits_per_pixel 16, scanline_pad 32
>>    depth 16, bits_per_pixel 16, scanline_pad 32
>>    depth 24, bits_per_pixel 32, scanline_pad 32
>>    depth 32, bits_per_pixel 32, scanline_pad 32
>> keycode range:    minimum 8, maximum 255
>> focus:  window 0x1a00005, revert to PointerRoot
>> number of extensions:    25
>>    BIG-REQUESTS
>>    DOUBLE-BUFFER
>>    DPMS
>>    Extended-Visual-Information
>>    FontCache
>>    LBX
>>    MIT-SCREEN-SAVER
>>    MIT-SHM
>>    MIT-SUNDRY-NONSTANDARD
>>    RANDR
>>    RENDER
>>    SECURITY
>>    SHAPE
>>    SYNC
>>    TOG-CUP
>>    X-Resource
>>    XC-APPGROUP
>>    XC-MISC
>>    XFree86-Bigfont
>>    XFree86-Misc
>>    XFree86-VidModeExtension
>>    XInputExtension
>>    XKEYBOARD
>>    XTEST
>>    XVideo
>> default screen number:    0
>> number of screens:    1
>>
>> screen #0:
>>  dimensions:    800x600 pixels (271x203 millimeters)
>>  resolution:    75x75 dots per inch
>>  depths (7):    24, 1, 4, 8, 15, 16, 32
>>  root window id:    0x37
>>  depth of root window:    24 planes
>>  number of colormaps:    minimum 1, maximum 1
>>  default colormap:    0x20
>>  default number of colormap cells:    256
>>  preallocated pixels:    black 0, white 16777215
>>  options:    backing-store NO, save-unders NO
>>  largest cursor:    64x64
>>  current input event mask:    0xda4031
>>    KeyPressMask             EnterWindowMask          LeaveWindowMask
>>    KeymapStateMask          StructureNotifyMask      
>> SubstructureNotifyMask
>>    SubstructureRedirectMask PropertyChangeMask       ColormapChangeMask
>>  number of visuals:    1
>>  default visual id:  0x21
>>  visual:
>>    visual id:    0x21
>>    class:    TrueColor
>>    depth:    24 planes
>>    available colormap entries:    256 per subfield
>>    red, green, blue masks:    0xff0000, 0xff00, 0xff
>>    significant bits in color specification:    8 bits
>>
>> the result of glxinfo is:
>>
>> Xlib:  extension "GLX" missing on display ":0.0".
>> Xlib:  extension "GLX" missing on display ":0.0".
>> Xlib:  extension "GLX" missing on display ":0.0".
>> Error: couldn't find RGB GLX visual
>>
>>   visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav
>> id dep cl sp sz l  ci b ro  r  g  b  a bf th cl  r  g  b  a ns b eat
>> ----------------------------------------------------------------------
>> Xlib:  extension "GLX" missing on display ":0.0".
>> Xlib:  extension "GLX" missing on display ":0.0".
>> 0x21 24 tc  1  0  0 c  .  .  0  0  0  0  0  0  0  0  0  0  0  0 0 None
>>
>> after reading these posts:
>>
>> http://public.kitware.com/pipermail/vtkusers/2002-January/058980.html
>> http://public.kitware.com/pipermail/vtkusers/2000-January/052691.html
>>
>> i have uncommented the line in my XF86Config file:
>>
>> Load "glx"
>>
>> and restarted x. my video card is quite crappy, so i'm not sure if it 
>> can, like, load glx or not. here is the relevant section from XF86Config:
>>
>> Section "Device"
>>    Identifier  "Standard VGA"
>>    VendorName  "Unknown"
>>    BoardName   "Unknown"
>>
>> # The chipset line is optional in most cases.  It can be used to override
>> # the driver's chipset detection, and should not normally be specified.
>>
>> #    Chipset    "generic"
>>
>> # The Driver line must be present.  When using run-time loadable driver
>> # modules, this line instructs the server to load the specified driver
>> # module.  Even when not using loadable driver modules, this line
>> # indicates which driver should interpret the information in this 
>> section.
>>
>>    Driver     "vga"
>> # The BusID line is used to specify which of possibly multiple devices
>> # this section is intended for.  When this line isn't present, a device
>> # section can only match up with the primary video device.  For PCI
>> # devices a line like the following could be used.  This line should not
>> # normally be included unless there is more than one video device
>> # intalled.
>>
>> #    BusID      "PCI:0:10:0"
>>
>> #    VideoRam   256
>>
>> #    Clocks     25.2 28.3
>>
>> EndSection
>>
>> # Device configured by xf86config:
>>
>> Section "Device"
>>    Identifier  "My Video Card"
>>    Driver      "vga"
>>        # unsupported card
>>    #VideoRam    1024
>>    # Insert Clocks lines here if appropriate
>> EndSection
>>
>> i'm using a card that i just found lying around. i have no idea what 
>> it is, but will generic vga drivers support glx? i don't even know 
>> what GLX is really!
>>
>> let me know if there is any more info that it would be useful to supply
>>
>> cheers
>>
>> iain
>>