Red Hat Bugzilla – Bug 508761
System runs very hot with 2.6.31 kernels
Last modified: 2013-01-10 02:12:40 EST
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
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