Bug 508761 - System runs very hot with 2.6.31 kernels
Summary: System runs very hot with 2.6.31 kernels
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: x86_64
OS: Linux
low
high
Target Milestone: ---
Assignee: John Feeney
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-06-29 18:24 UTC by birger
Modified: 2013-01-10 07:12 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2009-07-03 03:19:12 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description birger 2009-06-29 18:24:29 UTC
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 19:01:29 UTC
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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