svn commit: r296548 - in head/sys: dev/agp dev/drm2 dev/drm2/i915 modules/drm2/i915kms

[Edward Tomasz Napierała]

I have the exact same problem on T420.  Switching consoles back and forth
works as a workaround.

On 0411T1633, Adrian Chadd wrote:
> hiya,
> 
> My x230 backlight doesn't come back on after I suspend/resume :( Any
> ideas? does it work fine for you?
> 
> 
> 
> -adrian
> 
> 
> On 9 March 2016 at 17:31, Conrad Meyer <cem at freebsd.org> wrote:
> > On Wed, Mar 9, 2016 at 12:48 PM, Adrian Chadd <adrian.chadd at gmail.com> wrote:
> >> Woo!
> >>
> >> Just so its' not lost - people in irc have found power consumption has
> >> jumped dramatically since this commit. :(
> >
> > For the record, on X230 (Ivybridge) I actually see lower power
> > consumption with the new 3.8 kms:
> >
> > (All at brightness 100)
> > Old kernel, no KMS:  11W
> > Old kernel, KMS:  13W
> > New kernel, no KMS:  11W
> > New kernel, KMS:  11W
> >
> > With brightness down to minimum (5%):
> > New kernel, KMS:  8.9W
> >
> > Best,
> > Conrad
>