Comment 9 for bug 106289

BTW: I don't think this bug is related to "Macintosh mouse button emulation" as suggested some posts above. Googling for this phrase brings up lots of dmesg output indicating that thsi device is detected frequently with recent kernels. Hower, no keyboard problems are reported in the same context.

On my machine "Macintosh mouse button emulation" still shows up, but the keyboard now works with "acpi=off".