question qt designer in slackware 9

[Vivia Nikolaidou]

Hello,

> the next error take place:
> 
> Xlib: extension "GLX" missing on display ":0.0".
> Xlib: extension "GLX" missing on display ":0.0".
> Segmentation fault

A quick search on Google showed some possible solutions. For example, take 
a look at these links:

http://lists.trolltech.com/qt-interest/2004-01/thread00059-0.html
http://www.nvnews.net/vbulletin/showthread.php?t=51247

or just search for your error message on Google. :)