Fwd: USB to parallel for printer HP LaserJet 4mL

[Hans Petter Selasky]

On 06/10/14 07:44, Matthias Apitz wrote:
> El día Monday, June 02, 2014 a las 05:38:43PM +0200, Hans Petter Selasky escribió:
>
>>>> Try compiling the ulpt module with USB_DEBUG set:
>>>>
>>>> ee /sys/modules/usb/ulpt/Makefile
>>>>
>>>> ADD:
>>>>
>>>> CFLAGS+= -DUSB_DEBUG
>>>>
>>>> Rebuild and install the module.
>>>>
>>>> Set hw.usb.ulpt.debug=15
>>>
>>> Here it goes:
>>>
>>> # sysctl hw.usb.ulpt.debug=15
>>> hw.usb.ulpt.debug: 0 -> 15
>>>
>>> (now attaching the USB cable)
>>>
>>> # tail -f /var/log/messages
>>> Jun  2 16:57:59 La-Habana kernel: ugen1.2: <Prlific Technology Inc.> at usbus1
>>> Jun  2 16:57:59 La-Habana kernel: ulpt_probe:
>>> Jun  2 16:57:59 La-Habana kernel: ulpt_probe:
>>> Jun  2 16:57:59 La-Habana kernel: ulpt_attach: sc=0xc5833700
>>> Jun  2 16:57:59 La-Habana kernel: ulpt0: <Prlific Technology Inc.  IEEE-1284 Controller, class 0/0, rev 1.00/2.00, addr 2> on usbus1
>>> Jun  2 16:57:59 La-Habana kernel: ulpt_attach: setting alternate config number: 1
>>> Jun  2 16:57:59 La-Habana kernel: ulpt0: using bi-directional mode
>>> Jun  2 16:58:00 La-Habana kernel: ulpt_status_callback: error=USB_ERR_TIMEOUT
>>> Jun  2 16:58:29 La-Habana last message repeated 22 times
>>>
>>> (now doing in anaother session 'date > /dev/unlpt0')
>>>
>>> Jun  2 16:58:30 La-Habana su: guru to root on /dev/pts/1
>>> Jun  2 16:58:30 La-Habana kernel: ulpt_status_callback: error=USB_ERR_TIMEOUT
>>> Jun  2 16:58:41 La-Habana last message repeated 7 times
>>> Jun  2 16:58:42 La-Habana kernel: ulpt_write_callback: state=0x0 actlen=0
>>> Jun  2 16:58:42 La-Habana kernel: ulpt_status_callback: error=USB_ERR_TIMEOUT
>> Hi,
>>
>> TIMEOUT means the device is not receiving any data. Can you confirm that
>> the device is still working using other computers?
>
> Hi,
>
> I've pluged'in the USB-2-parallel cable into a Win7 laptop and Win
> recogniced the model of the printer at the other end of the cable fine
> as HP LasetJet 4ML and prints ofc fine too. I'm surprised, btw, that the
> toner after so many years in the cellary is still fine :-)
>
> And now?

Maybe you can sniff the USB traffic on the Win7 laptop, so that we can 
compare the order of USB events.

--HPS