CPU frequency went down

[NoOp]

On 12/07/2010 01:38 PM, A. Kromic wrote:
...
>>
> Ok, I investigated the matter a bit further and it seems everything
> hardware related we talked about are only coincidences. I've checked the
> BIOS first, and it had SpeedStep control on, just as I've left it
> before. Then I've tried booting two liveCDs, 10.10 'Maverick' had the
> same problem, BUT 10.04LTS 'Lucid'  had the CPU happily scaling up, just
> as I had it before. I booted them again to doublecheck, and I confirmed
> the behavior. So, it seems my initial suspicions were correct, some bug
> has crept in during the Lucid updates, since it started ok when fresh
> (and still does so from liveCD). Now I need to identify where the bug
> is; I suspect it might be the kernel since it completely fails to scale
> the frequency, even when accessed through /proc FS. Are there any other,
> perhaps ACPI related components that might interfere with it?

Good catch. Try booting the the previous kernel (2.6.32-21.32) to see if
that makes a difference. Or try the 'proposed' (2.6.32-27.49) - just
released a few hours ago. 27.49 has a huge list of proposed fixes - take
a look at the change log.

The most recent lucid kernel was a security patch nine days ago. I
wonder if that coincides with your problem:

https://launchpad.net/ubuntu/+source/linux
The Lucid Lynx  (supported)
Linux trunk series Change upstream link Remove upstream link
Show details 2.6.32-21.32 	release (main) 	34 weeks ago
Show details 2.6.32-27.49 	proposed (main) 	3 hours 40 minutes ago
Show details 2.6.32-26.48 	updates, security (main) 	nine days ago
Publishing details

    * Published on 2010-11-30
    * Copied from ubuntu lucid in Private PPA for Ubuntu Security Team

Changelog

linux (2.6.32-26.48) lucid-security; urgency=low
  [ Leann Ogasawara ]
  * SAUCE: AF_ECONET prevent kernel stack overflow
    - CVE-2010-3848
  * SAUCE: AF_ECONET SIOCSIFADDR ioctl does not check privileges
    - CVE-2010-3850
  * SAUCE: AF_ECONET saddr->cookie prevent NULL pointer dereference
    - CVE-2010-3849
 -- Leann Ogasawara <email address hidden>   Fri, 19 Nov 2010 16:10:05 -0800

Also check:
https://bugs.launchpad.net/ubuntu/+source/linux
Enter: scaling
in the search box and you'll find around 39 results.