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

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