The upgarde (4.1 -> 4.2) which appeared to be working didn't survive a 
reboot. This is on a Sony Vaio U1 sub notebook with a Radeon Mobility.

All aspects of 2d and 3d performance were considerably degraded. There 
was noticable shearing when moving windows and glxgears reported a frame 
rate of about 1/2 what it used to. The problem appeared to be 
*something* that was periodically (every second or so) slowing 
everything down drastically .. glxgears was noticabely jumpy, they'd 
spin fine for a second and then glitch, reducing the overall frame rate 
substantially. DVD playback was in slow motion.

I cleaned out the installation and re-installed 4.2 .. this time 
everything looked much better and was demonstrably much faster .. but 
now the X server refuses to shut down properly, requiring several alt 
backspaces to get me back to the shell prompt.

I'm going to re-install 4.1

sjb

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