I think that the problem I have is in the Kernel - but it affects CUPS
1.7.5 - running on Debian GNU/Linux 8 (jessie) 64-bit with all updates
installed.
If my memory serves me correctly I did some testing around 3 months ago
on the same system and had no problem with the same printer - but this
may be a red herring although I think the kernel was updated in the
meantime.
Basically Point Of Sale printer delays before printing. Sometime 29
seconds, has been several minutes.
The CUPS drivers have been reloaded several times and the PPD file
re-installed. (Epson TM-U220 on USB)
Network printers appear to work OK
Today kern.log shows:-
Jan 31 10:21:21 MOSQ-POS kernel: [ 910.794419] usblp0: removed
Jan 31 10:21:38 MOSQ-POS kernel: [ 927.318209] usblp 1-1:1.0: usblp0:
USB Bidirectional printer dev 2 if 0 alt 0 proto 2 vid 0x04B8 pid 0x0202
Jan 31 10:56:20 MOSQ-POS kernel: [ 3010.446535] usblp0: removed
Jan 31 10:56:41 MOSQ-POS kernel: [ 3031.665222] usblp 1-1:1.0: usblp0:
USB Bidirectional printer dev 2 if 0 alt 0 proto 2 vid 0x04B8 pid 0x0202
Jan 31 11:06:46 MOSQ-POS kernel: [ 3636.521992] usblp0: removed
Jan 31 11:07:09 MOSQ-POS kernel: [ 3659.035275] usblp 1-1:1.0: usblp0:
USB Bidirectional printer dev 2 if 0 alt 0 proto 2 vid 0x04B8 pid 0x0202
Jan 31 12:24:28 MOSQ-POS kernel: [ 8299.879895] usblp0: removed
Jan 31 12:25:05 MOSQ-POS kernel: [ 8336.693772] usblp 1-1:1.0: usblp0:
USB Bidirectional printer dev 2 if 0 alt 0 proto 2 vid 0x04B8 pid 0x0202
Jan 31 12:49:10 MOSQ-POS kernel: [ 9781.723667] usblp0: removed
Jan 31 12:49:49 MOSQ-POS kernel: [ 9820.691729] usblp 1-1:1.0: usblp0:
USB Bidirectional printer dev 2 if 0 alt 0 proto 2 vid 0x04B8 pid 0x0202
The usblp0 is removed when the print is initiated and printout only
starts again when the printer is found again (I guess that's what it means)
It appears that many people have reported this issue - or very very
similar - with several distributions.
Many thanks
Jim Cobley
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