[cups.bugs] [LOW] STR #2677: usb backend didn't detect printer

[Jordi Fernández]

On Friday 18 January 2008 06:03:30 Michael Sweet wrote:
> [STR Closed w/o Resolution]
>
> It's either a problem with the kernel driver or your device.
>
> Link: http://www.cups.org/str.php?L2677
> Version: 1.2.12

I also suposed it, but kernel people says that it seems a CUPS problem.
I have this problem only with 2 of my 4 printers: 

This one  (That works fine if I directly call #echo "Hello world" 
> /dev/usb/lp0) :
T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  6 Spd=12  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=04b8 ProdID=0202 Rev= 1.00
S:  Manufacturer=EPSON
S:  Product=TM-T88IV
S:  SerialNumber=J4HG006757
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  2mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=02 Driver=usblp
E:  Ad=01(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms

And this (I can't test it with the above command because it's not a raw 
printer):
T:  Bus=01 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 18 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=10ce ProdID=000e Rev= 0.01
S:  Manufacturer=SHINKO
S:  Product=CHC-S2145
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=usblp
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms


The others, runs perfectly with the same kernel and cups configuration, for 
example this:
T:  Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 19 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=03f0 ProdID=2b17 Rev= 1.00
S:  Manufacturer=Hewlett-Packard
S:  Product=HP LaserJet 1020
S:  SerialNumber=JL13D4M
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 98mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=usblp
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

What could I do ?