On 06/01/14 19:58, Matthias Apitz wrote:
El día Sunday, June 01, 2014 a las 07:44:51PM +0200, Hans Petter Selasky
escribió:
What does:
usbdump -i usbusX -f Y -s 65536 -vvv
Outpu when you run the cat?
Attached the output of
# usbdump -i usbus1 -f 2 -s 65536 -vvv > usbdump.txt
while running in another xterm
# date > /dev/unlpt0
Hi,
The trace shows that the device is not responding to a control request,
which is the port status control request. This is a violation of USB.org
ULPT standards.
Are you sure your device is genuine, hence the wrong spelling of
"Prolific" ?
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
Look for errors.
--HPS
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