[Bug 253232] ulpt possible regression in 12.2

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253232

--- Comment #2 from Brock Williams <brock at cottonwoodcomputer.com> ---
We are not using cups, and I verified it is not installed on the test system.

I tried a usbdump but not really sure what to look for.  The output looks the
same to me on the ones that work and that don't:

09:12:29.188729 usbus0.2 SUBM-CTRL-EP=00000000,SPD=FULL,NFR=1,SLEN=8,IVAL=50
09:12:29.194644 usbus0.2
DONE-CTRL-EP=00000000,SPD=FULL,NFR=1,SLEN=0,IVAL=50,ERR=0
09:12:29.194684 usbus0.2 SUBM-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=12,IVAL=0
09:12:29.196558 usbus0.2
DONE-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=0,IVAL=0,ERR=0
09:12:29.457889 usbus0.2 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0
09:12:29.465653 usbus0.2
DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0

vs

09:12:32.490567 usbus0.2 SUBM-CTRL-EP=00000000,SPD=FULL,NFR=1,SLEN=8,IVAL=50
09:12:32.496664 usbus0.2
DONE-CTRL-EP=00000000,SPD=FULL,NFR=1,SLEN=0,IVAL=50,ERR=0
09:12:32.496703 usbus0.2 SUBM-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=12,IVAL=0
09:12:32.498943 usbus0.2
DONE-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=0,IVAL=0,ERR=0
09:12:32.600296 usbus0.2 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0
09:12:32.608505 usbus0.2
DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0


We also determined that if we send data directly to the /dev/usb/0.2.1 device
as opposed to /dev/ultp0, it prints reliably.  We intend to use that as a
workaround for the time being.

FWIW, we have tried multiple computers, multiple printers, and multiple brands
of usb->parallel adapters, and so far, all of the combinations have had the
same problem.

Brock

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