Created attachment 219790 [details] Debug info 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 . --HPS
comment #1 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 ? --HPS
(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"
^Triage: I'm sorry that this PR did not get addressed in a timely fashion. By now, the version that it was created against is long out of support. Please re-open if it is still a problem on a supported version.