I KNOW WHAT WAS CAUSING MY SLOW GLX GEARS! IT HAPPENED AGAIN!
I'm such a fool.
It was sodding Seti@hHome even though it was low priority.
Bloody idiot thing runing in background on all my machines and I forgot
about it. Caused me hours of grief and two SuSE re-installs. At least
this new install has somehow sorted lots of other problems (like the
Windows key acting weird).