Magicolor 2400W slow

Matt Martin mgmspam1 at cox.net
Mon Oct 30 07:24:11 PST 2006


The Konica-Minolta amgicolor 2400 (m2430W) driver has gotten extremely slow sending data over USB. This has been verified with two different motherboards and at least Cups 1.2.4 and 1.2.5.  I know older versions of CUPS were not so slow

You can watch the debug log and see sequences of :

D [29/Oct/2006:15:35:46 -0700] [Job 17] Read 8192 bytes of print data...
D [29/Oct/2006:15:35:44 -0700] [Job 17] Received 132 bytes of back-channel data!
D [29/Oct/2006:15:35:45 -0700] [Job 17] Wrote 8192 bytes of print data...
D [29/Oct/2006:15:35:45 -0700] [Job 17] Received 132 bytes of back-channel data!

Running at one or two seconds per 8k !

I noticed a check in the usb-unix.c code which checks for Minolta in the printer name and stops looking for the "back-channel" data. Unfortunately the check currently doesn't work because of a different capitalization of the name. However, even after hard-coding the use_bc flag to 0 and re-installing, data transfer is still slow.

Any ideas or things to try ?





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