Comment 75 for bug 872483

@jimav, how much exactly does it slow down printing? In milliseconds?

I have a problem that seems similar.
After recent upgrade to CUPS 1.5.3, my HP LJ 4L connected via USB adapter printing what looks like command leftovers from previous job before printing the next job - judging from

# lpstat -p
printer HPLJ4L is idle. enabled since Tue 06 Oct 2015 09:17:09 PM MSK
        Sending data to printer.

(the job is just finished, all fine et al, but printer driver seems to be stuck in some "sending".)

All jobs correctly printed, but the paper waste is, of course, undesirable.

# lsusb
Bus 003 Device 004: ID 1a86:7584 QinHeng Electronics CH340S
...

# lpadmin -p HPLJ4L -o usb-unidir-default=true

did not helped.

# lpadmin -p HPLJ4L -o usb-no-reattach-default=true

seems to have done the trick.
lpstat still shows the printer stuck in "Sending data", but jobs now coming out correctly.