Re: A new Athlon 'bug'.

[Daniel Nofftz]

On Tue, 26 Nov 2002, Dave Jones wrote:

> On Mon, Nov 25, 2002 at 10:34:47PM +0100, Pavel Machek wrote:
>  > What happens when bit is programed wrongly?
>
> The documentation I have says nothing other than "...platforms are more
> robust..." with the fix. It's purely a reliability thing, but as it's
> fiddling with the CPU clock, it's possible that it may *slightly*
> affect performance too.

hi!
maybe somone remembers that i hacked a little bit with the power saving
modes of the athlon processor. so far as i know, the clk_ctl register is
importand when the athlon processor comes back from acpi-c2 mode. in c2 he
is disconnected from the system bus and the internal clock is clocked
down. in some cases a false value in this register could prevent the
athlon processor to come back from c2 -> lockup of the machine or
something like it ...
(bug 11 of the athlon processor revision guide)

daniel

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