Re: Raspberry Pi 3B USB Printing Issue

On Wed, Mar 16, 2022 at 10:17 PM Archimedes Gaviola <
archimedes.gaviola@gmail.com> wrote:

>
>
> On Wed, Mar 16, 2022 at 9:31 PM Hans Petter Selasky <hps@selasky.org>
> wrote:
>
>> Hi Archimedes,
>>
>> I don't see any issue in there. There should be a print containing ERROR .
>>
>> Did you set the DWC OTG debug level to 17 ?
>>
>
>
> Hi Hans,
>
> I tried that with debug level 17 on DWC OTG but my keyboard seems not
> responsive even when I unplug and re-plugged the keyboard. That's why I
> just stay to level 1. Let me try this time, I have an idea, I'll put this
> printing script in cron and run it there and then have the debug level at
> 17. Let's see how it goes.
>
> Thanks,
> Archimedes
>


Hi Hans,

The cron idea works and printing is now automated with DWC OTG in debug
level 17. With this debug level 17 enabled, my keyboard gets unresponsive
for some period of time but still you can type. It just takes time to
respond but not totally unresponsive. Anyway, nothing to worry now as
automation is in place. As of this moment, still no error is encountered,
very intermittent. So, until its presence.

By the way, I have another observation. Since this printing investigation,
the USB's physical port assignments of my Epson printer and my USB keyboard
haven't changed. My keyboard is detected and assigned as a ugen1.5 device
on usbus1 while my printer is assigned as ugen1.4 on usbus1 as well.
Sometimes I turned off this printer and after several hours turned it back
on, the usbus1 assignment of the printer changed to ugen1.5 device. Though
not all the time, I noticed this twice already. Is this an expected
behavior?

Thanks,
Archimedes