<Please, deactivate word-wrapping for better viewing>
What were the exact commands you used?
I tried anything, even unrelated commands:
chown -hR cts /proc/bus/usb
find /proc/bus/usb -type d -exec chmod 777 {} \;
find /proc/bus/usb -type f -exec chmod 666 {} \;
modprobe scanner vendor=0x04b0 product=0x4002
modprobe ehci-hcd
(and removed other usb modules [visor, usbserial, adiusbadsl]
to avoid interference, but nothing happened)
ln -s /dev/usb/scanner0 /dev/usbscanner
chmod 666 /dev/usb/scanner*
chown cts /dev/sg[0123]
Execute "dmesg | grep -i usb"
Here is the result of many modprobe, rmmod, off/on, ...
[root@greco root]# dmesg | grep -i usb
usb.c: USB disconnect on device 00:09.2-3 address 3
hub.c: new USB device 00:09.2-3, assigned address 4
usb.c: USB device 4 (vend/prod 0x4b0/0x4002) is not claimed by any active driver.
usb.c: USB disconnect on device 00:09.2-3 address 4
hub.c: new USB device 00:09.2-3, assigned address 5
usb.c: USB device 5 (vend/prod 0x4b0/0x4002) is not claimed by any active driver.
usb.c: USB disconnect on device 00:09.2-3 address 5
hub.c: new USB device 00:09.2-2, assigned address 6
usb.c: USB device 6 (vend/prod 0x4b0/0x4002) is not claimed by any active driver.
usb.c: USB disconnect on device 00:09.2-2 address 6
hub.c: new USB device 00:09.2-2, assigned address 7
usb.c: USB device 7 (vend/prod 0x4b0/0x4002) is not claimed by any active driver.
usb.c: registered new driver usbscanner
scanner.c: USB scanner device (0x04b0/0x4002) now attached to scanner0
scanner.c: 0.4.12:USB Scanner Driver
scanner.c: probe_scanner: User specified USB scanner -- Vendor

roduct - 4b0:4002
usb.c: USB disconnect on device 00:09.2-0 address 1
usb.c: USB disconnect on device 00:09.2-2 address 7
usb.c: USB bus 4 deregistered
hub.c: new USB device 00:09.0-2, assigned address 2
scanner.c: USB scanner device (0x04b0/0x4002) now attached to scanner0
ehci-hcd 00:09.2: VIA Technologies, Inc. USB 2.0
usb.c: new USB bus registered, assigned bus number 4
ehci-hcd 00:09.2: USB 2.0 enabled, EHCI 0.95, driver 2003-Jan-22
usb.c: USB disconnect on device 00:09.0-2 address 2
hub.c: USB hub found
hub.c: new USB device 00:09.2-2, assigned address 2
scanner.c: USB scanner device (0x04b0/0x4002) now attached to scanner0
usb.c: USB disconnect on device 00:09.2-2 address 2
<6>hub.c: new USB device 00:09.2-2, assigned address 3
scanner.c: USB scanner device (0x04b0/0x4002) now attached to scanner0
usb_control/bulk_msg: timeout
usb.c: USB disconnect on device 00:09.2-0 address 1
usb.c: USB disconnect on device 00:09.2-2 address 3
usb.c: USB bus 4 deregistered
hub.c: new USB device 00:09.0-2, assigned address 3
scanner.c: USB scanner device (0x04b0/0x4002) now attached to scanner0
ehci-hcd 00:09.2: VIA Technologies, Inc. USB 2.0
usb.c: new USB bus registered, assigned bus number 4
ehci-hcd 00:09.2: USB 2.0 enabled, EHCI 0.95, driver 2003-Jan-22
usb.c: USB disconnect on device 00:09.0-2 address 3
hub.c: USB hub found
hub.c: new USB device 00:09.2-2, assigned address 2
scanner.c: USB scanner device (0x04b0/0x4002) now attached to scanner0
and post the results. Also look in Vuescan's error logs and post
anything interesting/weird that you find.
Here is a simple session:
Start Vuescan in log mode
Preview => Scanner not ready
(several times)
Exit
VueScan 8.0.4 Linux
5115 0 TEST UNIT READY 0 0 0 0 0 0 f0020004 0500
5115 0 INQUIRY 12 1 1 0 4 0 00000004 0500 R 6 1 0 7
5115 0 INQUIRY 12 1 1 0 b 0 0000000b 0500 R 6 1 0 7 6 4d 6f 75 6e 74 0
5115 0 INQUIRY 12 1 c1 0 4 0 00000004 0500 R 6 c1 0 53
5115 0 INQUIRY 12 1 c1 0 57 0 00000057 0500 R 6 c1 0 53 3 0 3d 0 f 0 0 1 0 1 1 0 3 22 f a0 f a0 0 5a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f 6a f a0 f a0 0 5a 0 0 16 95 0 0 0 0 0 0 0 0 0 0 16 96 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 43 0 0 10 f 6a 1 2
5116 0 TEST UNIT READY 0 0 0 0 0 0 f0020004 0500
5116 0 INQUIRY 12 1 1 0 4 0 00000004 0500 R 6 1 0 7
5116 0 INQUIRY 12 1 1 0 b 0 0000000b 0500 R 6 1 0 7 6 4d 6f 75 6e 74 0
5116 0 INQUIRY 12 1 c1 0 4 0 00000004 0500 R 6 c1 0 53
5116 0 INQUIRY 12 1 c1 0 57 0 00000057 0500 R 6 c1 0 53 3 0 3d 0 f 0 0 1 0 1 1 0 3 22 f a0 f a0 0 5a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f 6a f a0 f a0 0 5a 0 0 16 95 0 0 0 0 0 0 0 0 0 0 16 96 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 43 0 0 10 f 6a 1 2
5117 0 TEST UNIT READY 0 0 0 0 0 0 f0020004 0500
5117 0 INQUIRY 12 1 1 0 4 0 00000004 0500 R 6 1 0 7
5117 0 INQUIRY 12 1 1 0 b 0 0000000b 0500 R 6 1 0 7 6 4d 6f 75 6e 74 0
5117 0 INQUIRY 12 1 c1 0 4 0 00000004 0500 R 6 c1 0 53
5117 0 INQUIRY 12 1 c1 0 57 0 00000057 0500 R 6 c1 0 53 3 0 3d 0 f 0 0 1 0 1 1 0 3 22 f a0 f a0 0 5a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f 6a f a0 f a0 0 5a 0 0 16 95 0 0 0 0 0 0 0 0 0 0 16 96 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 43 0 0 10 f 6a 1 2
5117 0 TEST UNIT READY 0 0 0 0 0 0 f0020004 0500
5117 0 INQUIRY 12 1 1 0 4 0 00000004 0500 R 6 1 0 7
5117 0 INQUIRY 12 1 1 0 b 0 0000000b 0500 R 6 1 0 7 6 4d 6f 75 6e 74 0
5117 0 INQUIRY 12 1 c1 0 4 0 00000004 0500 R 6 c1 0 53
5117 0 INQUIRY 12 1 c1 0 57 0 00000057 0500 R 6 c1 0 53 3 0 3d 0 f 0 0 1 0 1 1 0 3 22 f a0 f a0 0 5a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f 6a f a0 f a0 0 5a 0 0 16 95 0 0 0 0 0 0 0 0 0 0 16 96 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 43 0 0 10 f 6a 1 2
5118 0 TEST UNIT READY 0 0 0 0 0 0 f0020004 0500
5118 0 INQUIRY 12 1 1 0 4 0 00000004 0500 R 6 1 0 7
5118 0 INQUIRY 12 1 1 0 b 0 0000000b 0500 R 6 1 0 7 6 4d 6f 75 6e 74 0
5118 0 INQUIRY 12 1 c1 0 4 0 00000004 0500 R 6 c1 0 53
5118 0 INQUIRY 12 1 c1 0 57 0 00000057 0500 R 6 c1 0 53 3 0 3d 0 f 0 0 1 0 1 1 0 3 22 f a0 f a0 0 5a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f 6a f a0 f a0 0 5a 0 0 16 95 0 0 0 0 0 0 0 0 0 0 16 96 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 43 0 0 10 f 6a 1 2
5119 0 TEST UNIT READY 0 0 0 0 0 0 f0020004 0500
5119 0 INQUIRY 12 1 1 0 4 0 00000004 0500 R 6 1 0 7
5119 0 INQUIRY 12 1 1 0 b 0 0000000b 0500 R 6 1 0 7 6 4d 6f 75 6e 74 0
5119 0 INQUIRY 12 1 c1 0 4 0 00000004 0500 R 6 c1 0 53
5119 0 INQUIRY 12 1 c1 0 57 0 00000057 0500 R 6 c1 0 53 3 0 3d 0 f 0 0 1 0 1 1 0 3 22 f a0 f a0 0 5a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f 6a f a0 f a0 0 5a 0 0 16 95 0 0 0 0 0 0 0 0 0 0 16 96 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 43 0 0 10 f 6a 1 2
Thanks.