pcbsd9-stable-20120505 snapshot - howto enable intel rc6
user10508 at gmail.com
user10508 at gmail.com
Sat May 19 13:05:00 UTC 2012
> FWIW, I am running on a laptop with Intel-KMS driver with none of the
> power or thermal issues you are having. ThinkPad T520 Sandybridge. My
> cores are currently at 51 and 55 degrees with a load average of about
> .5, so pretty calm. Something is different in your system that is
> triggering the problem. I just don't know about hardware or software.
Thank you, this looks like its going to be fun after all.
Asus K53E intel gen2 core i5 4 GB ram - detected as 5 GB - hitachi 500GB
sata-2, 15.6 samsung display, atheros wifi and wired ethernet, usb2 etc
- bought four months ago.
Initial Software installed:
win7 - 64 bit something or other version - pre-installed, all updates
applied, with a really nice intel software application supporting the
IGA. Everything just works. IGA driver has had updates from intel; no
problems with temperature, fans never seem to run, screen color
temperature pretty accurate, no artifacts compiling or running other
software. I've installed the same set of software tools on win7 as I use
In addition to win7, I installed:
OpenSuse linux 11.4 - 64 bit, all updates applied, intel X driver
version 2.12,x, 2.6.X series linux kernel. Initial screen color
temperature problems corrected using redshift software package.
PcBsd 9.0-release 64 bit, updated to stable - intel X driver version 2.7.x
I initially installed PcBsd on zfs with encryption, but this was a non
starter for performance reasons as well as having compatibility problems
with some of the software I installed. Reinstalling on ufs without
encryption resulted in a stable system.
As with linux, I had a screen color temperature problem, but could not
correct it. Redshift existed in ports but didn't work. I tried it as a
package and compiled it from ports. Otherwise the system was fine; no
thermal problems, no screen artifacts; the intel IGA was driven by the
In feb, a kms snapshot release turned up for testing; I installed this;
redshift worked but so did the fans; while there were no screen
artifacts, the system was too hot to the touch for daily use. I
reinstalled PcBsd-9 and updated to stable.
The current may 5th snapshot release with kms replaced Opensuse on my
laptop. KMS was not enabled by default on this snapshot. To enable kms,
/etc/make.conf had to contain "WITH_NEW_XORG=yes" and X intel had to be
compiled from source; a "make install clean" in ports. I initially
installed on zfs with encryption; no problems with performance or
compatibility; redshift worked and so did the fans, but with this
snapshot, there were screen artifacts; X used xf86-video-intel 2.17.0.
At this point I wondered if ZFS and software encryption were too much
for the machine. I removed the snapshot; updated pcbsd9-stable in place
to the 20120505-snapshot and installed linux mint - debian - replacing
opensuse - to see what things were like on a recent linux release.
Updating to PcBsd-20120505 on ufs without encryption was uneventful, but
my laptop still runs hot to the touch, fans are always on and there are
screen artifacts. Redshift works, as does everything else.
On your system, what version does pkg_info return for xf86-video-intel;
how did you update to it; do you have WITH_NEW_XORG in /etc/make.conf?
Maybe the Devil is in these details.
Maybe I have to go back to 9-release; cvsup to stable; patch the kernel
for kms, get the 2.18.0 intel-driver and patch and install it.
Linux mint runs intel-2.18.x on a 3.2.x kernel; redshift runs and the
system is cool, like win 7.
I haven't been able to figure out if Rc6 is enabled on this release of
the intel driver for linux mint; I have to read some more, there doesn't
seem to be a sysctl variable set for this value on linux.
Thing is, given the relationship between kernel code and driver code on
linux, just installing 2.18.x doesn't guarantee anything if my system
needs rc6 enabled; its an ongoing process getting kms running on bsd;
I'm sure all the necessary changes to the bsd kernel will get done -
Since thermal and battery life problems have also been noted on linux
sandy bridge laptops on the way to a stable X intel driver, it doesn't
surprise me that I'm having problems; it is really interesting though,
that you are not.
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