Hello,

I am having trouble getting a Nikon LS-40 (CoolScan IV ED) to operate 
properly. I am using VueScan (7.5.10) as there are currently no SANE drivers 
for the LS-40. Part way through a scan the software will hang, and the 
scanner will need to be power cycled in order to be used again. These 
messages will be sent to syslog when it happens:

Mar 18 02:56:10 spoon kernel: usb_control/bulk_msg: timeout
Mar 18 02:56:10 spoon kernel: usb-uhci.c: interrupt, status 3, frame# 1150
Mar 18 02:56:10 spoon kernel: scanner.c: read_scanner(0): funky result:-75. 
Consult Documentation/usb/scanner.txt.
Mar 18 02:57:10 spoon kernel: usb_control/bulk_msg: timeout
Mar 18 02:57:10 spoon kernel: usb-uhci.c: interrupt, status 3, frame# 1789
Mar 18 02:57:10 spoon kernel: scanner.c: read_scanner(0): funky result:-75. 
Consult Documentation/usb/scanner.txt.

It will repeat like that once a minute. Others have reported the same 
problem. See this thread in comp.periphs.scanners for more info: 
http://groups.google.com/groups?hl=en&ie=ISO-8859-1&oe=ISO-8859-1&threadm=b476a0ed.0203181556.36a4f843%40posting.google.com&rnum=1&prev=/groups%3Fas_q%3Dlinux%2520ls40%26as_ugroup%3Dcomp.periphs.scanners%26as_scoring%3Dd%26hl%3Den
It seems that everyone having this problem has a 440BX chipset/PIIX4 USB 
controller. My system is Debian Woody with a 2.4.18 kernel, on a dual Celeron 
500 ABIT BP6 with 384 MB RAM.

The problem is Linux specific. If I reboot into win2kpro it works with no 
problems. Below is the contents of /proc/bus/usb/devices when the scanner is 
connected. I have no other USB devices.

# uname -a
Linux spoon 2.4.18 #3 SMP Fri Mar 15 01:52:10 PST 2002 i686 unknown
# cat /proc/bus/usb/devices
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc= 17/900 us ( 2%), #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=a000
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=01 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=ff(vend.) Sub=ff Prot=ff MxPS= 8 #Cfgs=  1
P:  Vendor=04b0 ProdID=4000 Rev= 1.10
S:  Manufacturer=Nikon
S:  Product=LS-40 ED
S:  SerialNumber=16777215
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=usbscanner
E:  Ad=01(O) Atr=02(Bulk) MxPS=  64 Ivl=  0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=  0ms
E:  Ad=83(I) Atr=03(Int.) MxPS=   8 Ivl=200ms

What other information would be helpful in debugging this problem? Please CC 
me on any replies.

Thanks,
-Bam


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