Date: Fri, 6 Feb 2015 17:14:59 -0800 From: Kevin Oberman <rkoberman@gmail.com> To: =?UTF-8?Q?Jan_Kokem=C3=BCller?= <jan.kokemueller@gmail.com> Cc: "freebsd-x11@freebsd.org" <freebsd-x11@freebsd.org> Subject: Re: Intel i915 support for RC6 Message-ID: <CAN6yY1tzr%2Bx=Cpfb=yt4cKv70CPqtjSeEZf-9Rqi6_=tuOpkbw@mail.gmail.com> In-Reply-To: <54D52600.40102@gmail.com> References: <CAN6yY1uUUMt5riU3JNCLRR_85gOho35EMDm33052kLdOT0kvpQ@mail.gmail.com> <54D52600.40102@gmail.com>
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On Fri, Feb 6, 2015 at 12:37 PM, Jan Kokem=C3=BCller <jan.kokemueller@gmail= .com> wrote: > > Is '7' reasonable and, if so, what do the other two bits do? > > The value of the sysctl is interpreted as a bitmask. There are three > different RC6 levels: RC6, RC6p and RC6pp. RC6pp is the deepest one with > the largest power savings. > Setting it to 7 enables all modes. dmesg then says: > > "info: [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp on" > > I would set it to 7 unless it makes the system unstable. RC6p seems to be > broken on Sandy Bridge but it is automatically disabled there. > Thanks, Jan. I'll give it a try next boot. -- Kevin Oberman, Network Engineer, Retired E-mail: rkoberman@gmail.com
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