Re: [Fwd: Re: enable i915 rc6 save 7 watt on kernel 3.2]

[keitho@strucktower.com]

Thanks Chen,

using the modinfo command I can see that I was mispelling... I was using
fcb instead of fbc...

Keith


> On Thu, Jan 19, 2012 at 06:07:16PM -0800, keitho@strucktower.com wrote:
>> > On Thu, Jan 19, 2012 at 10:29:19AM +0100, Martin Steigerwald wrote:
>> >> merkaba:~> cat /etc/modprobe.d/i915-kms.conf
>> >> options i915 modeset=1 i915_enable_rc6=1 i915_enable_fbc=1
>> >> semaphores=1
>>
>> When I try to use this line of options I get an error message saying
>> i915_enable_fcb is an unknown parameter. Is that for kernel 3.2 only?
> try ' sudo modinfo i915 ' see if it is available.
>
>> What does that parameter refer to? I tried googling on
> from the modinfo:
> " parm:           i915_enable_fbc:Enable frame buffer compression for
> power savings (default: -1 (use per-chip default)) (int)"
>
>> For my Lenovo T520 using only the integrated Intel graphics, do I need
>> drivers other than xserver-xorg-core, xserver-xorg-video-fbdev, and
>> xserver-xorg-video-intel?
>>
>> The reason I ask is that I sometimes, when experimenting with
>> different configurations get errors suggesting that I need the vesa
>> driver, and wonder if that is related to the error I get concerning
>> the i915_enable_fcb?
> judge from /var/log/Xorg.0.log, vesa module is loaded, so better to
> install xserver-xorg-video-vesa. i915_enable_fcb, as the modinfo
> suggested, more like a power saving parm.
>
>
> --
> Chen Wei
>