Created attachment 219790 [details]
I provide any information if you need, but i don't know want I need to debug this behaviour. This is debug info written by test binary that push bits to printer
w = write, r = read
What does "dmesg" say?
Did you check the permissions for the USB device of your printer? Recent versions of cupsd use libusb to access printers via /dev/ugenX.Y .
I use driver that give access through /dev/ulpt* and it randomly works...
Can you try to USB the LibUSB for interfacing the printer from CUPS ?
(In reply to Hans Petter Selasky from comment #2)
It's cause hard rewriting, but i try)
(In reply to Hans Petter Selasky from comment #3)
It's don't working, i can't retrieve handle
What does cups say in its logs under /var/log ?
(In reply to Hans Petter Selasky from comment #6)
CUPS works without errors due to the fact that the driver requires CUPS to access the printer via serial:/dev/null
I think we has insufficient reset on ulpt
I followed the behavior of the test program and realized that ulpt does not hold the connection to the printer, because read () responds with " Device not configured"