Bug 198942

Summary: i915kms module causes decrease of battery hours from ~8 to ~4
Product: Base System Reporter: Juha Nygård <moertael>
Component: kernAssignee: freebsd-bugs mailing list <bugs>
Status: New ---    
Severity: Affects Only Me CC: rodrigo
Priority: ---    
Version: 10.1-STABLE   
Hardware: amd64   
OS: Any   

Description Juha Nygård 2015-03-27 09:41:11 UTC
On my HP Elitebook 2530p laptop loading the i915kms module causes a significant decrease in use hours and thus increase in Watts used. I have the drm.i915.enable_rc6=7 in loader.conf

Running FreeBSD 10.1-STABLE r280615 amd64
Comment 1 Juha Nygård 2015-03-27 10:10:10 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193500 I think it is a duplicate. Setting hw.drm.msi=0 in loader.conf fixes it.