[sane-devel] mp780 working, but very slowly

Tomáš Pospíšek tpo_deb at sourcepole.ch
Wed Dec 22 09:15:41 UTC 2010

Hello List, Nicolas, Gernot,

this is a report from peter pilsl about whether current sane with 
Nicolas suggested patch here:


works with mp780.

I asked Peter and he replied in German. I translated the reply (modulo 
not important stuff) to English. Here it is:

Date: Mon, 20 Dec 2010 11:40:29 +0100 (CET)
From: peter pilsl
To: Tomáš Pospíšek
Subject: Re: test mp780?

Hello Tomáš,

finaly I found time for testing :)


* it [sane-backend with patch] works !!! I could do a preview and scan.
   Both from flatbed. If you need an ADF-Test, then tell me...

* it's unbelievably slow !!! scanning a ~4cm x 5cm photo in 600DPI takes
   1 minute 35 seconds. with the old official [Ubuntu] libsane it takes
   less than 15 seconds. That's 7x as slow. That's not good.

   To compare I started xsane with your libsane, scanned, closed xsane, did
   apt-get --reinstall install libsane and repeated the scan without
   changing a single configuration setting.

A full preview changed from 3 to 5 seconds.

Please let me know if you need more. I'll be at the scanner this week and 
then again in January.

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