Thanks Graham. I noticed that on my other Ubuntu machine there is no link to libglx in /usr/lib/xorg/modules. So today I removed this link and with only the link in /usr/lib/xorg/modules/extensions it works perfectly.
Thanks Graham. I noticed that on my other Ubuntu machine there is no link to libglx in /usr/lib/ xorg/modules. So today I removed this link and with only the link in /usr/lib/ xorg/modules/ extensions it works perfectly.