[Bug 236513] HP Thin clients T620/T730 ACPI: Only CPU core 0 detects C2 state

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Wed Mar 27 07:16:18 UTC 2019


--- Comment #25 from Andriy Gapon <avg at FreeBSD.org> ---
(In reply to stockhausen from comment #24)
I still don't understand the problem.
How does that 0x40b 1-byte port interfere with 0x414 port?
Or is it the other way around?  Are you abusing the system resource for 0x40b
to compensate for something wrong with 0x414?

It would be helpful [to me] to understand precisely why, on the unpatched
system, setting and allocating 0x414 port seems to work fine for cpu0 but not
for the other cpus?  That includes the order of acpi cpu devices attachment
(relative to each other and to other acpi "things").  An exact place in the
code where setting or allocating the resource fails and a reason why.

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