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Bug 18572 - acpi throttling on a toshiba 5005-S507 laptop.
Summary: acpi throttling on a toshiba 5005-S507 laptop.
Status: RESOLVED LATER
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: x86 Linux
: Normal minor (vote)
Assignee: x86-kernel@gentoo.org (DEPRECATED)
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2003-04-01 00:39 UTC by Josh Helmer
Modified: 2003-04-27 00:55 UTC (History)
0 users

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Package list:
Runtime testing required: ---


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Description Josh Helmer 2003-04-01 00:39:29 UTC
When I use the acpi4linux USE flag with the gentoo-sources kernel I have real   
performance issues.  After fighting with it for a while I believe that I have tracked   
down the problem.  It appears that the version of the acpi patch applied to the   
gentoo-sources kernel does not play nice with my hardware.  As soon as the   
machine boots the acpi driver throttles the CPU back to either 50% or 62% idle.  I 
tried echoing  other values into /proc/acpi/processor/CPU0/throttling, but any 
changes made by doing so only last for a few seconds before the driver throttles 
my system back down again.   This happens even when the processor module is 
not loaded... 
   
After struggling with this for a few days I finally started over with a clean   
2.4.21.pre6 kernel from kernel.org and the latest acpi patches.  Since then   
everything seems to be behaving MUCH better, but I would love to be able to use 
the gentoo-sources kernel rather than managing my own custom kernel...
Comment 1 Jay Pfeifer (RETIRED) gentoo-dev 2003-04-15 18:08:23 UTC
try gentoo-sources-2.4.20-r3 it has a much updated acpi. 
 
Thanks, 
 
Jay 
Comment 2 Josh Helmer 2003-04-16 01:39:33 UTC
Nope...  It still tries to throttle my CPU back to 50%... 
 
From looking at the code it looks like the acpi has been updated to version 20021122.  
Apparently the fix for this issue was not introduced until somewhere between versions 
20021122 and 20030321 (which I am currently running just fine). 
 
 
Comment 3 Jay Pfeifer (RETIRED) gentoo-dev 2003-04-27 00:55:23 UTC
as it stands now, there won't be an updated acpi until 2.4.21 on gentoo-sources. 
 
Jay