[sane-devel] Canon_pp problem with ppdev

Matthew Duggan stauff at guarana.org
Mon Oct 13 09:12:58 UTC 2008

On 06/10/2008, at 1:11 AM, sane.20.bertrandb at spamgourmet.com wrote:

> hi,
> I have a PC linux box with gentoo with kernerl 2.6.24 (same problem  
> with
> 2.6.25).
> when the ppdev module is load i can't use scanimage nor as root nor
> other user
> 'SANE_DEBUG_CANON_PP=100 scanimage'  give me
> [canon_pp] detect_mode: Opening port 0x378
> [canon_pp] detect_mode: Claiming port.
> [canon_pp] detect_mode: Unable to claim port
> [canon_pp] sane_init: Error detecting port mode on 0x378!
> when i unload the ppdev module scanimage works but only for root. Even
> users in lp group can't use scanner.
> what's the right version of canon_pp to use with 2.6 kernel ?


I don't think there's particularly a right version to use, the backend  
hasn't been touched in years.  Although, the parport_pc has been  
slightly broken for quite a while:


That might explain what you're seeing?  Is the I/O port displayed the  
same when you don't have ppdev loaded?  If not, er.. try messing with  
the bios settings so the port matches what parport_pc assumes?  Sorry  
it's not a great solution.. and sorry for the slow reply.


- Matthew Duggan

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