Trackpad + mouse + sleep +vista + Vaio Z = problems

This is specifically occurring on Z590, but may be there in all Z's.

If you have a USB mouse plugged in, and you go to sleep mode, and then disconnect the USB mouse, then when the laptop wakes up again, the trackpad does not work. If you plug-in the mouse at this point, the mouse works fine, but the trackpad is still entirely disabled. Vaio Control Center indicates the trackpad is still enabled, but no response at all from trackpad.

If you unplug the mouse, go to sleep, and wake up, the trackpad now works fine.

I am not sure when this bug was introduced, but can anyone replicate it as well? The trackpad seems to get disabled upon wakeup from sleep if the USB mouse was unplugged AFTER going into sleep mode.

Feedback appreciated!

 

I believe this is generic Windows problems -- various devices experience problems unless the state is the same when waking up as when going to sleep.

This is most often seen if going to sleep when docked and waking undocked, or the other way around. The workaround is to avoid sleep unless the state of attached devices can be maintained at wake-up time.

 

I believe Sony has a USB registry fix on this issue. Check it out on esupport.sony.com

 

I tried the USB registry fix for my USB flash drive, which would take a long time to activate once coming out of sleep. I don't know if it makes sense to apply it again - I think its just a registry write.