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List:       linux-usb-users
Subject:    [Linux-usb-users] HP6300c scanner failing via USB. OK via SCSI.
From:       scott fagg <scottf () bigpond ! net ! au>
Date:       2001-11-26 9:37:08
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I have a HP 6200c USB scanner on loan. It worked 50% of the time with
 kernel 2.4.9, but with 2.4.10 , 2.4.13 and 2.4.14 it refuses to work.
I'm using a VIA motherboard.

Same scanner works perfectly via SCSI. Fails via USB.

Via SCSI, there is a long pause before the first scan, but it eventually 
happens.
Via USB, there is a long pause, but the USB sub-system gives up and seems
to get it self in a mess. Even after waiting a very long time and trying 
again, i still
dont get anywhere.

From 2.4.9 :
cat /proc/bus/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc= 11/900 us ( 1%), #Int=  1, #Iso=  0
D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 0.00
S:  Product=USB UHCI Root Hub
S:  SerialNumber=6800
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=1.5 MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=045e ProdID=0038 Rev= 1.05
S:  Manufacturer=Microsoft
S:  Product=SideWinder Precision 2 Joystick
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 20mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=(none)
E:  Ad=81(I) Atr=03(Int.) MxPS=   6 Ivl= 10ms
T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=03f0 ProdID=0201 Rev= 1.00
S:  SerialNumber=SG8BO110JYHL
C:* #Ifs= 1 Cfg#= 1 Atr=60 MxPwr=  0mA

<< ********* at this point there is a brief hang ******** >>

I:  If#= 0 Alt= 0 #EPs= 3 Cls=00(>ifc ) Sub=00 Prot=00 Driver=usbscanner
E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=  0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  16 Ivl=  0ms
E:  Ad=83(I) Atr=03(Int.) MxPS=   1 Ivl=250ms



-- 
-----------------------
 scottf@bigpond.net.au
-----------------------


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