Virtual PC performance problems on Lenovo T61

Virtual PC guy has written about how laptop power management can impair virtual pc performance - resulting in jerky mouse behaviour and delayed/lost keystrokes.

The specific fix depends on the laptop brand and model.

For a Lenovo T61 or similar, posts and comments I have read out there suggest disabling power management completely. However this will cause shortened battery life when not on AC.

So I tried to disable power management only when connected to AC, as follows (based on the assumption that virtual pc won't be used when running on battery):

1. Reboot
2. Hold down F1 to go into BIOS
3. Select Config: Power: Intel SpeedStep: Mode for AC
4. Change from Automatic to Maximum Performance

Unfortunately this didn't improve things noticeably.