desktop-packages team mailing list archive

[Michael Thayer <1184699@xxxxxxxxxxxxxxxxxx>]

Martin, it might be good to wait for more feedback before closing this.
I suspect that different people may be seeing different issues, and that
some might still have problems.  And in defence of upstream, a short
sleep does seem reasonable to me when dealing with timing issues in
black box external hardware.  You never know what is going in inside of
it, and it could well just be that the designers never anticipated that
it would have to cope with communication at the speed USB 3 allows for.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to sane-backends in Ubuntu.
https://bugs.launchpad.net/bugs/1184699

Title:
  Canon LIDE 110 can only scan once, then I need to replug the usb cable

Status in Simple Scan:
  Invalid
Status in sane-backends package in Ubuntu:
  Fix Committed

Bug description:
  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@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@pc:~$ scanimage -v > test2.jpg # FAIL
  scanimage: no SANE devices found

  # TEST 2 : reconnect usb cable between scan attempts
  francois@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@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@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@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

To manage notifications about this bug go to:
https://bugs.launchpad.net/simple-scan/+bug/1184699/+subscriptions