[mythtv-users] MythTV and Satellite

[Dan Wilga]

At 10:36 AM -0700 2/6/06, James Dastrup wrote:
>I used to have a lot of missed channel changes and recordings on my
>Dish 311, too, but I finally solved it.  I used to get about 90%
>accuracy, but now I get a perfect 100% of signals sent properly. I
>can't tell you 'exactly' how I solved it, but it was a combination of
>kernel config, lircd.conf and my channel change script.  I'm using
>lirc-0.8.0 and this IR blaster: http://iguanaworks.net/ir/.  I don't
>know exactly what in the kernel helped if anything, but I made a lot
>of changes to preemption, timing and other cpu stuff. I didn't use
>nice at all. Here's my config files, in case this will help anyone.

I just recently did some kernel and LIRC updates, and all my previous 
problems with tuning using a homemade IR emitter via LIRC are now 
gone. Here are some relevant parameters:

   lirc-0.8.0pre3

   kernel 2.6.14.5 with these options:
     CONFIG_HPET_TIMER=y
     CONFIG_HPET_EMULATE_RTC=y
     CONFIG_PREEMPT_NONE=y
     # CONFIG_PREEMPT_VOLUNTARY is not set
     # CONFIG_PREEMPT is not set
     CONFIG_PREEMPT_BKL=y
     # CONFIG_HZ_100 is not set
     CONFIG_HZ_250=y
     # CONFIG_HZ_1000 is not set
     CONFIG_HZ=250
     (I think the most important part is setting the RTC timer 
frequency to 250 Hz and the CONFIG_PREEMPT_NONE option)

-- 
Dan Wilga                                         dwilga at mtholyoke.edu
Web Administrator                             http://www.mtholyoke.edu
Mount Holyoke College                                Tel: 413-538-3027
South Hadley, MA  01075            "Who left the cake out in the rain?"