[ubuntu-studio-users] GLX problem

[Mike Holstein]

On Dec 7, 2013 4:09 PM, "David King" <linuxman at avoura.com> wrote:
>
>
>  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?
>

Try booting an older kernel. Make sure you have necessary drivers
installed. It has nothing to do with flash...

>
> David K
>
>
>
>
>
>
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