[Pkg-cups-devel] Bug#489045: cups: infinite loop, 100%CPU use, while trying to print with HPJetDirect

[Andreas Mohr]

Environment clarification:
HPLJ4000TN JetDirect J3111A Firmware G.08.49 (newest), on a BNC(!)
connection.

This being a 10Mbps BNC connection here could be another indication
that this 100% CPU lockup issue possibly happens on slower connections only
(this issue does not seem to be too wide-spread, thus maybe it affects
slow-net users only)


The CUPS backend mechanism had issues before already
(STR #2664, http://www.cups.org/str.php?L2664+P0+S-2+C0+I0+E0+M20+Q ):

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r7204 | mike | 2008-01-09 19:59:55 +0100 (Mi, 09 Jan 2008) | 3 lines

Don't select() on the output side of the device if we have a
side-channel
callback - this causes 100% CPU usage (STR #2664)

Andreas Mohr