[sane-devel] Looking to get my Mustek A3 1200S flatbed Scanner with GL128 chip working with XSANE

George Chriss gschriss at gmail.com
Thu Jun 6 18:44:44 UTC 2013

>>      Having remote access to the scanner isn't enough. When testing, you
have to ear and see how the scanner is behaving. And you often turn it off
and on to reset it to a clean state.
>     If the scanner can be switched off remotely to reset it, or to avoid
stressing it when backend doesn't behave correctly, I'll have a try working
on it.

Login instructions for a Trisquel box sent off-list.

The live-stream is located at:

The green power strip is attached to the scanner and a room lamp, both
controlled by 'sudo /home/dev/usbpower [on|off|status]' via a
USB Net Power 8800 relay.  The camera and computer are attached to an
always-on power strip.

The relay, scanner, and a ThinkPenguin TPE-N150USB WiFi adapter are
connected via a 5-port PCIe USB card; no devices are attached directly to
the host USB.  The TPE-N150USB has issues with warm-resets [1] ; the host
ports are always-on and hopefully the PCIe card is more robust to do
development work.  Reboots should be safe and streaming will resume


Pipeline used:
gst-launch-0.10 -e rtspsrc location=rtsp:// latency=100 !
queue max-size-bytes=100000000 max-size-time=0 ! rtpjpegdepay ! queue
max-size-bytes=100000000 max-size-time=0 ! videorate force-fps=18 ! queue
max-size-bytes=100000000 max-size-time=0 ! jpegdec ! queue
max-size-bytes=100000000 max-size-time=0 ! videoscale ! video/x-raw-yuv,
width=640, height=363 ! queue max-size-bytes=100000000 max-size-time=0 !
theoraenc bitrate=450 speed-level=1 ! queue max-size-bytes=100000000
max-size-time=0  ! oggmux ! queue max-size-bytes=0 max-size-time=0 !
shout2send ip=localhost port=8000 password=hackme mount=/mustek-a3-2400s.ogv

The ThinkPenguin TPE-N150USB adapter uses libre firmware, located at [2],
with a replacement kernel module from Ubuntu.  The adapter is hopefully
stable; this is something of a stress-test.



[1] https://github.com/qca/open-ath9k-htc-firmware/issues/1

> Regards,
>     Stef
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