Wireless won??™t connect after waking up. As with the video card, make sure
you have the latest driver and firmware for your wireless adapter. Also,
try changing the device??™s power settings: in Device Manager, doubleclick
your wireless network adapter. Choose the Power Management
tab, and turn off the Allow the computer to turn off this device to save
power option.
222 | Chapter 5: Performance
USB devices don??™t work after waking up. This is a confirmed bug in Windows
Vista, one fixed by Microsoft Hotfix #928631, available at http://
support.microsoft.com/kb/928631.
Out of free disk space. As explained earlier, the Hibernate feature creates an
image file on your hard disk equal in size to the amount of installed memory.
If you have 2 GB of RAM, then Windows will need 2,147,483,648
bytes of free disk space for the hiberfil.sys file. If hibernation doesn??™t
work, or if it??™s exceedingly slow, try deleting the hibernation file as
described in the ???What is hiberfil.sys???? sidebar, earlier in this section.
Then, defragment your hard disk, and re-enable hibernation.
Trouble recovering from Sleep. Go to http://www.passmark.com/products/
sleeper.htm and download the free PassMark Sleeper tool to help test
your computer??™s ability to enter and recover from Sleep, Standby, and
Hibernate modes.
Keep in mind that you may never get your system to reliably go to sleep
and wake up, but if you are able to get this feature working, it can be very
convenient.
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