[GRASSLIST:6127] nviz startup script error

[javier garcia]

Hi;
I've recently installed grass5.0.2. And I've tried to execute nviz with the 
following result:
-----------------------
Loading Data
Update elev null mask
Loading Data
translating colors
Adding panels from /usr/local/grass5/etc/nviz2.2/scripts
Nv_(panels)
toplevel made
Error in startup script: Togl: X server has no OpenGL GLX extension
    while executing
"togl $BASE.canvas -rgba true -double true -depth true "
    (procedure "Nv_makeGUI" line 24)
    invoked from within
"Nv_makeGUI .top"
    (file "/usr/local/grass5/etc/nviz2.2/scripts/nviz2.2_script" line 660)
child process exited abnormally
    while executing
"exec /usr/local/grass5/etc/nviz2.2/NVWISH2.2 -f 
/usr/local/grass5/etc/nviz2.2/scripts/nviz2.2_script -name NVIZ >&@stdout"
    ("eval" body line 1)
    invoked from within
"eval exec $env(GISBASE)/etc/nviz2.2/NVWISH2.2 -f 
$env(GISBASE)/etc/nviz2.2/scripts/nviz2.2_script -name NVIZ
>&@stdout"
    invoked from within
"if {$argv == ""} {
#no arguments
eval exec $env(GISBASE)/etc/nviz2.2/NVWISH2.2 -f 
$env(GISBASE)/etc/nviz2.2/scripts/nviz2.2_script -name NVIZ >&@stdo..."
    (file "/usr/local/grass5/bin/nviz" line 16)
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I couldn't install readline (could this have any relationship?)
What could I do?

Thanks and regards
Javier