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So apparently the fault is not with SULD.

I did the following things to get it working:

* uninstall samsung-mfp-scanner
* uninstall colord

And now printing and scanning work! Yay me! :-)

(As an aside I'd like to say that the password requirements for this forum are quite strict...)

I'm on Ubuntu 12.10 (Amd64) and have an SCX-3200.

Scanning and printing used to work fine, but after some (?) software upgrades scanning no longer works.

I tried driver versions 3.00.90, 4.00.35 and 4.00.39. I also tried those suggestions from the Scanning Troubleshooting page that seemed appropriate.

i@blep:~ $ scanimage -L
device `xerox_mfp:libusb:002:007' is a Samsung Samsung SCX-3200 Series multi-function peripheral
device `smfp:SAMSUNG SCX-3200 Series on USB:0' is a SAMSUNG SCX-3200 Series on USB:0 Scanner

I usually use a script that calls "scanimage -p" and then converts the PBM data using ImageMagick. Now scanimage gets stuck at 1.5% progress and eats up all cpu cycles.
Xsane shows a similar problem: scanning seems to start, judging from the noises from the device, but then the program just locks up at 100% cpu utilization.

When I stop scanimage (Ctrl-C) and start it again, I get the following error:
scanimage: open of device smfp:SAMSUNG SCX-3200 Series on USB:0 failed: Error during device I/O

This is the output from dmesg:
[ 1993.131033] usb 2-5: new high-speed USB device number 6 using ehci_hcd
[ 1993.264653] usb 2-5: New USB device found, idVendor=04e8, idProduct=3441
[ 1993.264661] usb 2-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1993.264666] usb 2-5: Product: SCX-3200 Series
[ 1993.264670] usb 2-5: Manufacturer: Samsung Electronics Co., Ltd.
[ 1993.264674] usb 2-5: SerialNumber: Z509BFCBA05565H
[ 1993.265795] usblp 2-5:1.1: usblp0: USB Bidirectional printer dev 6 if 1 alt 0 proto 2 vid 0x04E8 pid 0x3441
[ 1993.282103] usb 2-5: usbfs: interface 1 claimed by usblp while 'colord-sane' sets config #1
[ 1994.429180] usblp0: removed
[ 1994.430680] usblp 2-5:1.1: usblp0: USB Bidirectional printer dev 6 if 1 alt 0 proto 2 vid 0x04E8 pid 0x3441
[ 1996.981791] usb 2-5: usbfs: process 3732 (colord-sane) did not claim interface 0 before use
[ 2001.300781] usb 2-5: usbfs: process 3732 (colord-sane) did not claim interface 0 before use
[ 2034.162733] usb 2-5: usbfs: interface 1 claimed by usblp while 'scanimage' sets config #1
[ 2036.912747] usb 2-5: usbfs: process 3780 (scanimage) did not claim interface 0 before use
[ 2041.232458] usb 2-5: usbfs: process 3780 (scanimage) did not claim interface 0 before use
[ 2041.233659] usb 2-5: usbfs: interface 1 claimed by usblp while 'scanimage' sets config #1