Every week or so, mouse driver locks up. The LED laser goes out and none of the buttons operate. It's a generic 7 button USB mouse with my USB keyboard still active. I do not know what precipitates the lockup and a system diagnostic request (Sft-Alt-Ctl-Cmd .) does not seem to yield anything useful. > ps -ef|grep -i mouse 501 579 1 0 Mon01PM ?? 0:04.42 /System/Library/ExtensionKit/Extensions/MouseExtension.appex/Contents/MacOS/MouseExtension code-block so the mouse extension was running at the time. With a "sudo kill -HUP 579" it did not restart. Also, switching to a different mouse did no good. The mouse driver was behaving like it was deadlocked and I didn't know the correct incantation for restarting it. I power cycle reset the box. SO: you have a mouse driver problem it cannot be just me It behaves like a deadlock, but not knowing how to get a mouse driver dump, I cannot tell what lock(s) its waiting for.