For the last several years I have used laptops and, being a road warrior, docked them in numerous different docking stations all over the world. The laptop always detected the presence or absence of speakers, mouse (left or right-handed) or whatever. Suddenly, after upgrading to Windows XP Pro (full system and apps install after HD crash), the laptop no longer does this. I use a right-handed mouse in my home dock and a left-handed one at the office. I created new hardware profile (never had to do THAT before) for each location but when I try to disable a device in Device Manager, the Device Usage block is grayed out.
HW is Dell Inspiron 4100, P4-M, 1.7 GHz, w/ 512MB RAM, Win XP Pro SP1.
Light bulbs you shouldn't buy
There are plenty of dimmable LED light bulbs, but make sure you don't buy the ones that flicker when you dial them down.