On Tue, 2017-06-20 at 11:18 -0600, Alex Henrie wrote:

<snip>

quoted

Does this patch mean we can assume that the hardware model is
"pc105"
instead of various flavours of "mac" in xkeyboard-config's X
keymaps?

I use the pc105 keymap with my Macbook 12,1 and don't have any
problems, so for me at least, the answer is yes.

Yay! This was a long-standing "wouldn't it be nice" bug from when I
still used a MacBook Air on a daily basis:
https://bugzilla.gnome.org/show_bug.cgi?id=650379
https://bugzilla.gnome.org/show_bug.cgi?id=650772
https://bugs.freedesktop.org/show_bug.cgi?id=37446

quoted

Does this also work with older Apple USB keyboards? (Most of the
older
ones triggered the "press those 2 buttons so we can figure out
which
type of keyboard you have", under macOS)

The oldest Apple ISO keyboard I could find information on is the
"Apple Geyser3 ISO", USB ID 05ac:0218. In 2008 an Arch Linux forum
user posted the output of `lsusb -v` which shows that bCountryCode is
set to 13 on this keyboard:
https://bbs.archlinux.org/viewtopic.php?pid=328653#p328653

Do you have any old Apple ISO keyboards? If you find one that doesn't
fill in bCountryCode, we could bring back the APPLE_ISO_KEYBOARD
quirk
for that model.

I have a 2011 MacBook Pro on which I could test this (I honestly don't
remember the cut-off for ADB/BIOS keyboards to USB), but no external
ones.

I also wonder whether that data is exported for Bluetooth and the newer
I2C keyboards.