[sane-devel] "epkowa" driver installation on Ubuntu 8.10

DamienC damien.courousse at free.fr
Mon Apr 6 16:46:53 UTC 2009

Hello all, 

Googling on the Internet, because of the "W: Ignoring Provides line with
DepCompareOp for package iscan-interpreter" issue, I found this.

I experienced this on a freshly installed i386 Debian Lenny.
I got the packages iscan-plugin-gt-x750_2.1.0-4_i386.deb and
iscan_2.19.0-4_i386.deb from

I have installed them with dpkg (did not use the Ubuntu workaround).
Installation and setup went fine except for the same error as Olav, as
reported below.

I have tried to cleanup the apt database without success.

Please could you tell me how to solve this? I can also provide more info if


Alesh Slovak wrote:
> Hi,
>> Thank you very much, Alesh. Since you are replying off list, do I
>> understand correctly that questions about the epkowa/iscan software
>> should rather not be posted on sane-devel?
> No, that's not the case at all. I replied to the list as well as 
> directly to you. I usually do this just to make sure that the original 
> poster gets my reply in case they miss it on the list.
>>> Ah, yes, we are aware of this problem, but as far as we are concerned 
>>> this is Ubuntu's mess. There isn't much we can do, unfortunately. This 
>>> should sort itself out when Debian migrates to libltdl7, which isn't 
>>> going to be for another few years, I guess.
>> Again, I'm not a developer, but I have been using Debian and Ubuntu for
>> quite some time now. I think I have seen packages that had "either or"
>> dependencies (or whatever they were called). 
>  From what I understand, we can't just do that because it would still 
> require recompiling for each type of system. Ones with libltdl7 and ones 
> with libltdl3. There are fairly simple workarounds, so we mentioned it 
> in the documentation and left it at that.
>> Perhaps Ubuntu users should at least be forewarned about this issue, or
>> they will all have the same problem.
> As mentioned above, this problem is mentioned in the documentation 
> included in the package, but it isn't exactly easily accessible. It 
> might be a good idea to put this information on the website as well.
>>> iscan-interpreter is a virtual package used for determining 
>>> compatibility between versions of iscan and its plugins, so yes, you 
>>> won't find it anywhere. I am not exactly sure why this message is being 
>>> displayed, but it shouldn't be a problem.
>> That's what I gathered. But I still think it is a (cosmetic, low
>> priority) bug. Perhaps it can be registered as such.
> We haven't seen this error in our testing, and seeing as how you 
> installed with a very unorothodox method, I am tempted to chalk it up to 
> that.
> If you do see this again using the workaround I mentioned, then please 
> let me know.
> Alesh
> -- 
> Alesh Slovak                    Linux Team -- AVASYS Corporation
> alesh.slovak at avasys.jp          http://avasys.jp
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