On Thu, 13 May 2010, Bastien Nocera wrote: > > Maybe you didn't update to the latest firmwares on you Mac Mini, and > didn't see the problem with the updated BIOSes, I don't know. I can't update the firmware, since it's some random OS X program that does it (and I don't have OS X on the machine). But where does it lock up? During the boot probing? Or does it probe as having a keyboard because Apple added some crazy SMM code to try to emulate one with USB? Afaik, the Apple hardware actually does _physically_ have a keyboard controller (it's on the regular intel southbridge silicon, afaik), it just isn't connected to anything. And I think it is turned off in some of the southbridge control registers. The control registers also allow trapping into SMI when accessing the keyboard control registers, and maybe Apple screwed up there somewhere. On one of my Mac Mini's (didn't check the other), I get this: [ 2.955087] PNP: No PS/2 controller found. Probing ports directly. [ 2.958475] i8042.c: No controller found. [ 2.960998] mice: PS/2 mouse device common for all mice what do you get? The thing is, there's a _lot_ of machines out there with no legacy keyboard support. They tend to work. We have timeouts for the i8042 commands we do during init, but maybe we missed some case. And maybe we could easily add some extra tests too. A few printk's in the i8042 init routines to show where it locks up would be good.. I assume you did that already if you and Dmitry already tried to debug this. Where's the original thread? Linus -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
