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Date:      Thu, 04 Feb 2021 16:18:45 +0000
From:      bugzilla-noreply@freebsd.org
To:        usb@FreeBSD.org
Subject:   [Bug 253232] ulpt possible regression in 12.2
Message-ID:  <bug-253232-19105-Qnf0JYCfW3@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-253232-19105@https.bugs.freebsd.org/bugzilla/>
References:  <bug-253232-19105@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D253232

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

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

09:12:29.188729 usbus0.2 SUBM-CTRL-EP=3D00000000,SPD=3DFULL,NFR=3D1,SLEN=3D=
8,IVAL=3D50
09:12:29.194644 usbus0.2
DONE-CTRL-EP=3D00000000,SPD=3DFULL,NFR=3D1,SLEN=3D0,IVAL=3D50,ERR=3D0
09:12:29.194684 usbus0.2 SUBM-BULK-EP=3D00000001,SPD=3DFULL,NFR=3D1,SLEN=3D=
12,IVAL=3D0
09:12:29.196558 usbus0.2
DONE-BULK-EP=3D00000001,SPD=3DFULL,NFR=3D1,SLEN=3D0,IVAL=3D0,ERR=3D0
09:12:29.457889 usbus0.2 SUBM-CTRL-EP=3D00000080,SPD=3DFULL,NFR=3D2,SLEN=3D=
8,IVAL=3D0
09:12:29.465653 usbus0.2
DONE-CTRL-EP=3D00000080,SPD=3DFULL,NFR=3D2,SLEN=3D4,IVAL=3D0,ERR=3D0

vs

09:12:32.490567 usbus0.2 SUBM-CTRL-EP=3D00000000,SPD=3DFULL,NFR=3D1,SLEN=3D=
8,IVAL=3D50
09:12:32.496664 usbus0.2
DONE-CTRL-EP=3D00000000,SPD=3DFULL,NFR=3D1,SLEN=3D0,IVAL=3D50,ERR=3D0
09:12:32.496703 usbus0.2 SUBM-BULK-EP=3D00000001,SPD=3DFULL,NFR=3D1,SLEN=3D=
12,IVAL=3D0
09:12:32.498943 usbus0.2
DONE-BULK-EP=3D00000001,SPD=3DFULL,NFR=3D1,SLEN=3D0,IVAL=3D0,ERR=3D0
09:12:32.600296 usbus0.2 SUBM-CTRL-EP=3D00000080,SPD=3DFULL,NFR=3D2,SLEN=3D=
8,IVAL=3D0
09:12:32.608505 usbus0.2
DONE-CTRL-EP=3D00000080,SPD=3DFULL,NFR=3D2,SLEN=3D4,IVAL=3D0,ERR=3D0


We also determined that if we send data directly to the /dev/usb/0.2.1 devi=
ce
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 bra=
nds
of usb->parallel adapters, and so far, all of the combinations have had the
same problem.

Brock

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