I just solved the problem.  The old Apple Extended Keyboard, as revered by Apple fans as my IBM Model M, continued the function key mapping past F12, adding F13, F14, and F15 where Print Screen, Scroll Lock, and Pause/Break is on an IBM 101-key layout.  Then they mapped F14 and F15 to dim and brighten the screen, respectively.  See the problem?  Yeah, the IOGear hotkey is “dim dim”!

This post is part of my series focused on PC/Mac Integration.

• Vista, OS X Boot Time Compared
• Quick and Easy Bluetooth Sharing Between PC and Mac
• Yes, FireWire is Faster Than USB
• How to Keep an IOGear KVM from Dimming Your Mac's Screen
• Command and Control: The Clash of Keyboards

It turns out that this is easy to fix.  Leopard’s Keyboard & Mouse Preferences panel includes a tab to remap Keyboard Shortcuts.  Down at the bottom of the list is “Display”.  Expand it and you’ll see the two mappings in question – just un-check them and you’re good to go!

While you’re there, marvel at how none of the other function key shortcuts match up to their functions on the pre-2008 MacBook uses!  It’s a really bizarre oversight on the part of Apple to map bright/dim to F14/F15 and to F1/F2 on the same computer at the same time, depending if you’re using the built-in keyboard or not!  Apparently, the company shifted all the mappings around for the late 2007 desktop and early 2008 portables, too.

By the way, about that KVM – it’s pretty good, especially for the money.  I previously used a GCS62, which is a PS/2 in and out model with no audio, but the GCS632U is more suited to weirdos like me that like to use a PS/2 keyboard and mouse with a modern computer.  It takes PS/2 in but sends USB out to the connected computers, and includes audio, too.  It’s rock-solid, unlike the Belkin Flip I tried before, but I do wish the audio cable wasn’t captive to the video like it is – it’s just not long enough for the Mac.

Note: Some of these links include affiliate codes that help pay for this blog. For example, buying an Amazon Kindle with this link sends a few bucks my way! But I don't write this blog to make money, and am happy to link to sites and stores that don't pay anything. I like Amazon and buy tons from them, but you're free to buy whatever and wherever you want.

© sfoskett for Stephen Foskett, Pack Rat, 2008. | How to Keep an IOGear KVM from Dimming Your Mac’s Screen
This post was categorized as Apple, Computer History, Terabyte home. Each of my categories has its own feed if you'd like to filter out or focus on posts like this.