[Bluez-devel] Extremely slow printing?

[Jon Valvatne <jon@valvatne.com>]

Hello,

I got my bluetooth CF card today, stuck it in my laptop, and I have to
say I'm very impressed with the status of BlueZ; all my bluetooth
devices are working fine with minimal effort.

I'm noticing just one annoyance: I've got a Canon i80 printer with the
bluetooth module, and printing over bluetooth turns out to be *much*
slower than printing over USB: A 250K postscript file takes 40 seconds
to print over USB, but 3 minutes to print over bluetooth.

I'm not very familiar with the internals of printers and printer
drivers, so I'm not sure how surprising this is. The raw speed advantage
that USB has shouldn't be an issue here, since bluetooth's bandwidth
should still be enough to transfer the data in a couple of seconds. Is
latency the issue? Or is it inefficiencies in the bluetooth backend for
CUPS?

I suppose I'll try using Canon's own drivers under Windows, which might
tell me whether or not this is an inherent problem with printing over
the bluetooth medium. But I thought I'd ask here as well.

Thanks in advance,

Jon



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