Pretty much the same happens for me too in Gutsy Gibbon/Canon PowerShot
G6:
"An error occurred in the io-library ('Bad parameters'): Could not find
USB device (vendor 0x4a9, product 0x30b3). Make sure this device is
connected to the computer."
[EMAIL PROTECTED]:/home/deepfire # lsusb
Bus 001 Device 001: ID 0000:0000
Bus 002 Device 003: ID 046d:c024 Logitech, Inc.
Bus 002 Device 002: ID 058f:9254 Alcor Micro Corp. Hub
Bus 002 Device 001: ID 0000:0000
Bus 002 Device 004: ID 0b38:0003
[EMAIL PROTECTED]:/home/deepfire # ls -l /proc/bus/usb/
.usbfs/ 001/ 002/ devices
[EMAIL PROTECTED]:/home/deepfire # ls -l /proc/bus/usb/001/
total 0
crw-rw-r-- 1 root root 189, 0 May 5 15:29 001
[EMAIL PROTECTED]:/home/deepfire # ls -l /proc/bus/usb/002
total 0
crw-rw-r-- 1 root root 189, 128 May 5 15:29 001
crw-rw-r-- 1 root root 189, 129 May 5 15:29 002
crw-rw---- 1 root plugdev 189, 130 May 5 15:29 003
crw-rw-r-- 1 root root 189, 131 May 5 15:29 004
[EMAIL PROTECTED]:/home/deepfire # cat /proc/bus/usb/devices
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh=10
B: Alloc= 37/900 us ( 4%), #Int= 4, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.18-mm3-betelheise ohci_hcd
S: Product=OHCI Host Controller
S: SerialNumber=0000:00:02.0
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=255ms
T: Bus=02 Lev=01 Prnt=01 Port=08 Cnt=01 Dev#= 2 Spd=12 MxCh= 4
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=058f ProdID=9254 Rev= 3.12
S: Manufacturer=ALCOR
S: Product=Generic USB Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=02 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 4 Spd=1.5 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0b38 ProdID=0003 Rev= 1.00
S: Product=USB-compliant keyboard
C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=01 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=10ms
I: If#= 1 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=82(I) Atr=03(Int.) MxPS= 4 Ivl=10ms
T: Bus=02 Lev=01 Prnt=01 Port=09 Cnt=02 Dev#= 3 Spd=1.5 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=046d ProdID=c024 Rev=98.02
S: Manufacturer=B16_b_02
S: Product=USB-PS/2 Optical Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 98mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 5 Ivl=10ms
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh=10
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.18-mm3-betelheise ehci_hcd
S: Product=EHCI Host Controller
S: SerialNumber=0000:00:02.1
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
** Changed in: gthumb (Ubuntu)
Status: Rejected => Confirmed
--
gThumb half-works with my digital camera
https://bugs.launchpad.net/bugs/24746
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