On Sun, Mar 11, 2007 at 07:55:12PM -0400, Michael Papazoglou wrote: > On 3/11/07, Michael Papazoglou <[EMAIL PROTECTED]> wrote: > > Hi, > > > > lircd doesn't respond > > at all when using either of the tuners on the 500, and it responds > > intermittently (like 1 out of 4 times) using the tuner on the 350. > > When I stop the capture, lirc works great again (without having to > > restart it). > > > > Everything worked great when I used to use the IR receiver that came > > with the 350, but that's no longer an option (the IR dongle was stolen). > > > > Turning off closed-captions in mythtv-settings fixed this for me. It > turns out that if I captured from any of the tuners before running > myth after a reboot, everything was fine. So i can live without > CC, but I'm wondering why > that would interfere with a serial IR receiver? >
I had the same problem with 2 PVR-150s. lirc_serial would have a hard time "hearing" the remote. It would get worse when both tuners were recording. The reason is because the homebrew receiver works by sending IRQs, LIRC measures the time between those IRQs and uses that information to determine keys being pressed. Anything that happens to interfere with those times (we're talking microseconds here) affects the accuracy of the resulting measurements. Higher AEPS and EPS values in lircd.conf can help a little bit but not a lot. The real solution is to remove whatever is making the IRQs get messed up. Hard drives using DMAs and not using masking may help. The way I fixed it is removing any AIPC/APIC in the BIOS. Whether this fixes the problem because of AIPC/APIC themselves interfere or because this causes less (or just different) IRQ allocation, I don't know. If you don't need power management, turn it off. -- Tarek _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
