Bug 200209 - CPUSPEED not working reliably on Pentium-M
Summary: CPUSPEED not working reliably on Pentium-M
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel-utils
Version: 4.0
Hardware: i686
OS: Linux
Target Milestone: ---
: ---
Assignee: Jarod Wilson
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2006-07-26 07:27 UTC by Zenon Panoussis
Modified: 2008-08-02 23:40 UTC (History)
0 users

Clone Of:
Last Closed: 2007-06-04 21:39:49 UTC

Attachments (Terms of Use)

Description Zenon Panoussis 2006-07-26 07:27:15 UTC
Description of problem:

See bug #188453. The problem is identical and the AC/battery behaviour too. I'm
seeing this on a Siemens Lifebook E8010 running Cen^wRHEL 4.3, kernel
-34.0.2.EL. Refiling as a separate bug since it's another distribution and a
different package.

Comment 1 Jarod Wilson 2007-01-24 15:40:05 UTC
Still an issue w/the 4.4 and/or forthcoming 4.5 kernels? (I'm going to guess yes...)

Comment 2 Zenon Panoussis 2007-02-01 05:58:56 UTC
RIP E8010. Three months ago I stupidly left it on the bed, fluffy isolating
duvet under it, running. When I came back it was stone dead, presumably due to
overheating related to this bug. 

I'm now using a Siemens Amilo Pro V2010, Celeron-M, on U4. On this machine there
is no difference between AC and battery. Speed scaling doesn't work, period. 

For a couple of weeks now I've been meaning to install tikanga on this machine.
If I do I can report on that, but then no onger on U5. What's more interesting
for you?

Comment 3 Jarod Wilson 2007-02-01 20:51:22 UTC
RHEL5 is far more interesting to me, and quite a bit has improved wrt laptops
and power managment between RHEL4 and RHEL5. If we can't get it working under
RHEL5, chances are its a BIOS support issue.

Comment 4 Jarod Wilson 2007-06-04 21:39:49 UTC
Please open a new bug if there are freq scaling issues on the new machine,
closing this one out due to the original machine no longer being available for test.

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