On my MacBook Air, the Ubuntu 10.04 VMWare guest OS was losing time whenever the Air went to sleep. To keep time synchronized between the host and guest, install VMWare Tools AND enable time synchronization by executing sudo /usr/bin/vmware-toolbox. Make sure the following checkbox is selected.
Since its purchase, my primary Windows 7 laptop has suffered from random bluetooth disconnects to both the mouse and keyboard. Since the disconnects are almost always simultaneous, I suspected a problem in either the laptop’s bluetooth module or the software driver.
After the latest frustrating disconnect, I once again sought an answer from the wisdom of Google. This time, however, my queries proved fruitful. Disabling the power management features of the bluetooth module as detailed in this article solved my bluetooth issues.