<html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body text="#000000" bgcolor="#FFFFCC"> <div class="moz-forward-container"> Hi all, I am currently having a problem with all things GLX related, i.e. screensavers that use GLX are no longer working, also a game that uses GLX. E.g. when running foobillard in terminal I get the following error: main:rgstereo=0Video mode set failed: Couldn't find matching GLX visual It used to work fine, running from the main menu. But now it's failing to find the right GLX visual. I get the same thing for screensavers, Xlib: extension "GLX" missing on display ":0.0" This line is displayed several times on the screen instead of the screensaver, and the last bit says it exited abnormally (code 1) I wonder if this is Flash/Gnash related? I recently found that Firefox was running extremely slowly on any site with Flash elements, so I removed Flash (I have heard it is very troublesome at times to some Linux users) and installed Gnash instead. Firefox works much better, and also with Flash-blocking add ons so that I only allow certain sites to use Flash. I am not sure if the GLX problem occurred before or after this. My Desktop is XFCE on Ubuntu Studio 12.04 Of course it might also have been a recent update that might have knocked out GLX. In using Synaptic I see that the GLX stuff is still installed. I tried reinstalling some of it, but it made no difference. I am using the Linux open source graphics driver for my graphics card, nothing proprietary. It is an AMD card. So how do I get GLX working again? David K </div> </body> </html>