Re: pi zero w as tramsitter

Hi,

On Sat, Aug 29, 2020 at 06:10:28PM +0200, grumpy--- via LIRC-list wrote:
> for a couple of years i have used a pi zero w with a tsal6400 led to control devices
> i've had no problems until recently
> i purchased a no brand name hdmi switcher
> i recorded the remote but the pi zero w refused to control the device
> just as a test i plugged the led into a pi3
> it worked great talk'n to the switcher
> the pi zero w and the pi3 have the same version of raspbian
> they both use the same version of lirc and the same config files
> the led is driven by a transistor that is powered external to the pi's
> has anyone experienced this behavior before

So it would be useful to know what driver your are using for IR, i.e.
is it lirc_rpi, or gpio-ir-tx? What version of raspbian are you using?

One explanation is that the gpio-ir-tx driver has flaws which have only
recently been fixed:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/media/rc/gpio-ir-tx.c?id=ea8912b788f8144e7d32ee61e5ccba45424bef83

The problems fixed by this patch certainly can be affected by a slower CPU.

It would be good to know if this fixes your problems by compiling your
kernel with this patch.

Thanks
Sean