kern/117607: dev.cpu.0.freq not showing up any longer on amd64 notebook

[Arno J. Klaassen]

>Number:         117607
>Category:       kern
>Synopsis:       dev.cpu.0.freq not showing up any longer on amd64 notebook
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 28 16:00:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator:     Arno J. Klaassen
>Release:        amd64 -6stable
>Organization:
SCITO SA
>Environment:
FreeBSD demo 6.2-STABLE FreeBSD 6.2-STABLE #7: Thu Sep 20 12:57:15 CEST 2007     toor at demo:/files/amd64/obj/files/bsd/src6/sys/D470K  amd64
>Description:

When using cpufreq, dev.cpu.0.freq does not show up any longer on boot.

No difference if I use cpufreq as module or include in kernel.

Same behaviour when booting a 7-stable kernel cross-build on 6-stable.

It used to work for years on same hardware and problem showed up sometime during the summer   
>How-To-Repeat:

>Fix:

(when used as module) : kldunload cpufreq and then kldload again.
After a couple of trials dev.cpu.0.freq shows up and powerd will work OK from then on.



>Release-Note:
>Audit-Trail:
>Unformatted: