[Bug 1184699] [NEW] Canon LIDE 110 can only scan once, then I need to replug the usb cable

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Michael (michaeljt):

I have a Canon LIDE 110 scanner which works by default on ubuntu 13.04. 
The problem is after first scan, I can not scan for second time. I need to reconnect the USB cable to use the scanner again.

# TEST 1 : without reconnecting the usb cable
francois at pc:~$ scanimage -v > test1.jpg # success
scanimage: scanning image of size 636x885 pixels at 8 bits/pixel
scanimage: acquiring gray frame
scanimage: min/max graylevel value = 0/255
scanimage: read 562860 bytes in total
# I don't unplug plug the usb cable.
francois at pc:~$ scanimage -v > test2.jpg # FAIL
scanimage: no SANE devices found

# TEST 2 : reconnect usb cable between scan attempts
francois at pc:~$ scanimage -v > test1.jpg # success
scanimage: scanning image of size 636x885 pixels at 8 bits/pixel
scanimage: acquiring gray frame
scanimage: min/max graylevel value = 0/255
scanimage: read 562860 bytes in total
# I unplug and replug the usb cable.
francois at pc:~$ scanimage -v > test2.jpg # SUCCESS
scanimage: scanning image of size 636x885 pixels at 8 bits/pixel
scanimage: acquiring gray frame
scanimage: min/max graylevel value = 0/255
scanimage: read 562860 bytes in total

francois at pc:~$ dmesg # extract
[  829.365158] usb 3-1: USB disconnect, device number 2
[  834.935000] usb 3-1: new high-speed USB device number 4 using xhci_hcd
[  834.952515] usb 3-1: New USB device found, idVendor=04a9, idProduct=1909
[  834.952519] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  834.952522] usb 3-1: Product: CanoScan
[  834.952524] usb 3-1: Manufacturer: Canon
[ 1623.738811] usb 3-1: USB disconnect, device number 4
[ 1623.739072] xhci_hcd 0000:00:14.0: Slot 3 endpoint 6 not removed from BW list!
[ 1625.528827] usb 3-1: new high-speed USB device number 5 using xhci_hcd
[ 1625.546327] usb 3-1: New USB device found, idVendor=04a9, idProduct=1909
[ 1625.546331] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1625.546334] usb 3-1: Product: CanoScan
[ 1625.546336] usb 3-1: Manufacturer: Canon

francois at pc:~$ uname -a && cat /etc/issue
Linux pc 3.8.0-22-generic #33-Ubuntu SMP Thu May 16 15:17:14 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 13.04 \n \l

The problem was reported here by someone else :
http://askubuntu.com/questions/278473/canon-lide-110-should-reconnect-
usb-for-each-scan

Thanks
François

** Affects: simple-scan
     Importance: Undecided
         Status: New

** Affects: sane-backends (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: patch
-- 
Canon LIDE 110 can only scan once, then I need to replug the usb cable
https://bugs.launchpad.net/bugs/1184699
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