Well, I’ve decided to declare 2011 the year of finally getting my ergonomics sorted out, and to that end I went and splashed out on a Kinesis Freestyle split keyboard, and an Apple Magic Trackpad. More on the keyboard later, this post is all about the Magic Trackpad.
The Magic Trackpad is, sadly, a bluetooth device which means a certain amount of messing around with hidd. The missing link for me was that there needs to be a bluetooth PIN agent running to prompt you for the PIN you want to connect with: hidd --connect won’t do that for you. There are all sorts of gnomic things, but the simplest one is the simple-agent which comes as part of the bluez distro ... run this in another terminal, now when hidd tries to connect it’ll contact the simple-agent, you can enter the proper PIN [*], and it'll connect.
Alternatively, the gnome bluetooth applet seems to work, although it has some odd UI bugs. See also this post on broken bluetooth support in ubuntu / bluez 4 which explains where hcid.conf has gone ...
It also helps to know that the trackpad is a bit fussy about when it is discoverable ... the easiest thing is to hold the button down until the light starts flashing a slowish double-blink, and keep holding it down until the connection is made. Otherwise it seems to time out. If the light goes out instead of starting to flash, you’ve turned the trackpad off instead of on.
Now, that’s enough to get you basic mouse function ... move the pointer, button one on tap or click. But that’s not all that useful, especially in X windows.
The file /usr/share/X11/xorg.conf.d/60-magictrackpad.conf (created by package xserver-xorg-input-evdev) overrides the trackpad to use the “evdev” driver. If you don’t already have a custom xorg.conf as in these instructions, the easiest way to override it back again is to create a file /usr/share/X11/xorg.conf.d/99-magictrackpad.conf:
Section "InputClass" Identifier "Magic Trackpad" MatchUSBID "05ac:030e" Driver "synaptics" Option "SHMConfig" "True" EndSection
Which defines it right back to what you’d like it to be. Apparently many more sophisticated gestures are available with the multitouch driver, but I’m kind of used to synaptics so I’ll stick with it for the moment.
So this is what the input part of the desk looks like right now:
This puts the halves of the kinesis keyboard about the right distance apart for me, and the trackpad is well positioned to get to without much wrist movement. The synaptics driver uses the right hand edge of the trackpad for vertical scrolling ... this is particularly easy to do with my right thumb.
|[*]||0000, of course|