Bug 508761 – System runs very hot with 2.6.31 kernels

Bug 508761 - System runs very hot with 2.6.31 kernels

Summary:	System runs very hot with 2.6.31 kernels

Status:	CLOSED RAWHIDE

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	kernel (Show other bugs)
Sub Component:
Version:	rawhide
Hardware:	x86_64 Linux

Priority	low Severity high
Target Milestone:	---
Target Release:	---
Assigned To:	John Feeney
QA Contact:	Fedora Extras Quality Assurance
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Reported:	2009-06-29 14:24 EDT by birger
Modified:	2013-01-10 02:12 EST (History)
CC List:	4 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
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Last Closed:	2009-07-02 23:19:12 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description birger 2009-06-29 14:24:29 EDT

Description of problem:
I'm running on HP EliteBook 2530p with Fedora Rawhide x86_64. 4GB RAM and 80GB SSD

When I boot 2.6.31.* the fan comes on rather quickly, and the system gets uncomfortably hot. Running powertop I can make some observations
I usually see most of the cpu time in C6 state, now it's almost 50% C0.

I have almost 500 wakeups/sec, and > 90% are kernel core, where it used to be about a fifth, and most due to wlan driver.


Version-Release number of selected component (if applicable): 2.6.31


How reproducible: All kernels in this series I have tried so far.


Steps to Reproduce:
1. Boot a 2.6.31 kernel
2. Look at powertop output
3. Feel the heat
  
Actual results:


Expected results:


Additional info:

Comment 1 birger 2009-07-01 15:01:29 EDT

I just installed the 2.6.31-0.35.rc1.git5.fc12.x86_64 kernel, and the power usage is back to normal.

At the moment I have 87% in state C6 even if I am typing this in firefox running in wine. Power usage balances around 10W again. No fans running. Silence... :-)

Thanks for a quick fix

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