(In reply to comment #1)

Sorry it's taken me so long to get back to you. Here's the requested
information. I think you're right, this may just be a rehash of bug #8241,
because today the scanner/xsane works (still must sudo) with the USB camera
plugged in at the same time. I'm not sure if I tried the scanner + camera + sudo
combination earlier. Sorry if this is a duplicate. Thank you.

Anyhow, here's the info:

=================================================================
First as user:
=================================================================
spetiam@ubuntu ~ $ lsusb
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 002: ID 0545:8080 Xirlink, Inc. IBM C-It WebCam
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 003: ID 03f0:1016 Hewlett-Packard Jornada 548 Pocket PC
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
spetiam@ubuntu ~ $ ls -lR /proc/bus/usb
/proc/bus/usb:
total 0
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 001
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 002
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 003
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 004
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 005
-r--r--r--    1 root     root            0 Nov 13 09:55 devices

/proc/bus/usb/001:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001

/proc/bus/usb/002:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001

/proc/bus/usb/003:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001
-rw-r--r--    1 root     root           57 Nov 13 09:36 003
-rw-rw----    1 root     scanner        57 Nov 13 09:58 005

/proc/bus/usb/004:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001
-rw-r--r--    1 root     root           91 Nov 13 09:37 002

/proc/bus/usb/005:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001
spetiam@ubuntu ~ $ cat /proc/bus/usb/devices/
cat: /proc/bus/usb/devices/: Not a directory
spetiam@ubuntu ~ $ cat /proc/bus/usb/devices

T:  Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 5
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 ehci_hcd
S:  Product=NEC Corporation USB 2.0
S:  SerialNumber=0000:00:0d.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 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=   2 Ivl=256ms

T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 ohci_hcd
S:  Product=NEC Corporation USB (#2)
S:  SerialNumber=0000:00:0d.1
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms

T:  Bus=04 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 1.01 Cls=ff(vend.) Sub=ff Prot=ff MxPS= 8 #Cfgs=  1
P:  Vendor=0545 ProdID=8080 Rev= 3.0a
S:  Product=USB IMAGING DEVICE
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=ibmcam
E:  Ad=81(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 0 Alt= 1 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=ibmcam
E:  Ad=81(I) Atr=01(Isoc) MxPS=1022 Ivl=1ms
I:  If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=82(I) Atr=02(Bulk) MxPS=   0 Ivl=0ms
I:  If#= 1 Alt= 1 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=82(I) Atr=02(Bulk) MxPS=1022 Ivl=0ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 3
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 ohci_hcd
S:  Product=NEC Corporation USB
S:  SerialNumber=0000:00:0d.0
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms

T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=16 #Cfgs=  1
P:  Vendor=03f0 ProdID=1016 Rev= 0.00
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  2mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=ipaq
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=1ms

T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  5 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1606 ProdID=0230 Rev= 1.00
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=00(>ifc ) Sub=00 Prot=00 Driver=(none)
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=   1 Ivl=1ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 uhci_hcd
S:  Product=VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (#2)
S:  SerialNumber=0000:00:07.3
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 uhci_hcd
S:  Product=VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
S:  SerialNumber=0000:00:07.2
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms
spetiam@ubuntu ~ $

=================================================================
Now with sudo:
=================================================================
spetiam@ubuntu ~ $ sudo lsusb
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 002: ID 0545:8080 Xirlink, Inc. IBM C-It WebCam
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 005: ID 1606:0230 Umax [hex] Astra 2200/2200SU
Bus 003 Device 003: ID 03f0:1016 Hewlett-Packard Jornada 548 Pocket PC
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
spetiam@ubuntu ~ $ sudo ls -lR /proc/bus/usb
/proc/bus/usb:
total 0
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 001
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 002
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 003
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 004
dr-xr-xr-x    2 root     root            0 Nov 13 09:36 005
-r--r--r--    1 root     root            0 Nov 13 09:55 devices

/proc/bus/usb/001:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001

/proc/bus/usb/002:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001

/proc/bus/usb/003:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001
-rw-r--r--    1 root     root           57 Nov 13 09:36 003
-rw-rw----    1 root     scanner        57 Nov 13 09:58 005

/proc/bus/usb/004:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001
-rw-r--r--    1 root     root           91 Nov 13 09:37 002

/proc/bus/usb/005:
total 0
-rw-r--r--    1 root     root           43 Nov 13 09:36 001
spetiam@ubuntu ~ $ sudo cat /proc/bus/usb/devices/
cat: /proc/bus/usb/devices/: Not a directory
spetiam@ubuntu ~ $ sudo cat /proc/bus/usb/devices

T:  Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 5
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 ehci_hcd
S:  Product=NEC Corporation USB 2.0
S:  SerialNumber=0000:00:0d.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 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=   2 Ivl=256ms

T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 ohci_hcd
S:  Product=NEC Corporation USB (#2)
S:  SerialNumber=0000:00:0d.1
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms

T:  Bus=04 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 1.01 Cls=ff(vend.) Sub=ff Prot=ff MxPS= 8 #Cfgs=  1
P:  Vendor=0545 ProdID=8080 Rev= 3.0a
S:  Product=USB IMAGING DEVICE
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=ibmcam
E:  Ad=81(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 0 Alt= 1 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=ibmcam
E:  Ad=81(I) Atr=01(Isoc) MxPS=1022 Ivl=1ms
I:  If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=82(I) Atr=02(Bulk) MxPS=   0 Ivl=0ms
I:  If#= 1 Alt= 1 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=82(I) Atr=02(Bulk) MxPS=1022 Ivl=0ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 3
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 ohci_hcd
S:  Product=NEC Corporation USB
S:  SerialNumber=0000:00:0d.0
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms

T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=16 #Cfgs=  1
P:  Vendor=03f0 ProdID=1016 Rev= 0.00
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  2mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=ipaq
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=1ms

T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  5 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1606 ProdID=0230 Rev= 1.00
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=00(>ifc ) Sub=00 Prot=00 Driver=(none)
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=   1 Ivl=1ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 uhci_hcd
S:  Product=VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (#2)
S:  SerialNumber=0000:00:07.3
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.8.1-2-386 uhci_hcd
S:  Product=VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
S:  SerialNumber=0000:00:07.2
C:* #Ifs= 1 Cfg#= 1 Atr=c0 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=   2 Ivl=255ms
spetiam@ubuntu ~ $

=================================================================
=================================================================

> This suspiciously sounds like bug #8241.
> 
> Can you please stick in both the camera and the scanner and send the output of
> the following commands:
> 
>   lsusb
>   ls -lR /proc/bus/usb
>   cat /proc/bus/usb/devices/
> 
> Thanks!