Re: 2.6.0-test2 has i8042 mux problems

[Stefan Reinauer <stepan@suse.de>]

* dean gaudet <dean-list-linux-kernel@arctic.org> [030728 04:13]:
> i've got a box on which 2.4.x works fine, but 2.6.0-test2 gets into a snit
> when it's trying to initialize the i8042.  i can get 2.6.0-test2 to boot
> if i add "i8042_nomux".
> 
> the mux initialization code seems kind of ... wonk -- it seems to write
> values to the registers then read back and if the value is the same then
> it assumes the mux is there.  that seems way too likely to be broken in
> situations when the mux isn't there... it'd be better to be looking for
> some value which is different after writing.
> 
> the southbridge in this system is the ali1563.  if it helps i can supply a
> complete trace of in/out on ports 0x60 and 0x64.
 
I can confirm this. I have an Amilo A laptop with the following sb:
00:07.0 ISA bridge: ALi Corporation M1533 PCI to ISA Bridge [Aladdin IV]

without "i8042_nomux" the keyboard is recognized fine, but no mouse is
found on the mux. With the option everything works fine.

Stepan