Hello, On Oct 28 23:24 Fred A. Miller wrote (shortened):
The Epson Perfection 4490 is an AWESOME scanner!! I had to reinstall to 10.3 32-bit from 64-bit due to the driver not willing to work with 64-bit, and took a slight performance hit because of it.
I think I understand now why it doesn't work with 64-bit. The reason is that 64-bit software and 32-bit software are totally separated (except the kernel level). Some details if you have an AMD 64-bit "x86_64" system: On the one hand on x86_64 hardware 32-bit i386 software can work. But on the other hand 32-bit software requires 32-bit libraries. Only the kernel on x86_64 has a special interface to accept both 64-bit and 32-bit system calls. On x86_64 from user application down to the kernel interface (but excluding the actual kernel which is of course the same) 64-bit software and 32-bit software are totally seperated: 64-bit application -> 64-bit library -> 64-bit kernel interface 32-bit application -> 32-bit library -> 32-bit kernel interface There is the following sequence of used libraries, see http://en.opensuse.org/SDB:Configuring_Scanners_from_SUSE_LINUX_9.2 "SANE Backends": 1. A scanning frontend links with the SANE library libsane.so which is in fact the dll pseudo-driver. 2. The dll pseudo-driver dlopen()s the other drivers which is in your case the epkowa driver. 3. In your particular case the epkowa driver needs a proprietary 32-bit-only library to operate your model. Therefore on a 64-bit system: If you run a 64-bit scanning frontend (e.g. the 64-bit version of scanimage, xscanimage, xsane, or kooka) then it links with the 64-bit version of libsane.so.1 which again links with the 64-bit version of the epkowa driver which then fails to link with a 64-bit version of the proprietary library because there is only a 32-bit version of these library. In contrast on a 32-bit system: If you run a 32-bit scanning frontend (e.g. the 32-bit versions of scanimage, xscanimage, xsane , or kooka) then it links with the 32-bit version of libsane.so.1 which again links with the 32-bit version of the epkowa driver which then can link with the 32-bit version of the proprietary library so that your scanner works. Summary: It should work if you install a 64-bit system except the scanning software so that only the scanning software is full 32-bit (i.e. you must manually install 32-bit scanning packages). Alternatively use only the 32-bit Iscan packages (iscan, iscan-proprietary-drivers, and iscan-firmware) and use only its included scanning frontend "iscan" on your 64-bit system (i.e. you cannot use the 64-bit versions of scanimage, xscanimage, xsane , or kooka). I filed https://bugzilla.novell.com/show_bug.cgi?id=337816
... only 2400dpi is possible, when the scanner will do 4800x9600
See this mail from the Iscan main author:
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Date: Wed, 14 Jun 2006 08:56:29 +0900
From: Olaf Meeuwissen
It only gives these resolutions: [epkowa] resolution (dpi): 300 [epkowa] resolution (dpi): 600 [epkowa] resolution (dpi): 1200 [epkowa] resolution (dpi): 2400
But iscan gives a lot more options, but alas 2400 is the highest resolution there too. The scanner is however advirtised as being capable of 4800x9600.
Your scanner can scan at 4800dpi optical. However, the support level of the epkowa (and epson) backend only allow settings in the list you included :-( The iscan frontend does the other ones in software. To add support for resolutions > 3200 modifications in both the frontend as well as the backend are required. If you want this supported, I suggest you file a support request with pipsnews at avasys.jp Hope this helps, -- Olaf Meeuwissen EPSON AVASYS Corporation, SE1 ----------------------------------------------------------------------- By the way: Feel free to ask Epson Avasys for 64-bit versions of their proprietary modules so that their hardware and their driver can work out of our box even on 64-bit "x86_64" systems. Of course I already asked for 64-bit versions but I am not their customer who buys their scanners ;-) Kind Regards Johannes Meixner -- SUSE LINUX Products GmbH, Maxfeldstrasse 5, 90409 Nuernberg, Germany AG Nuernberg, HRB 16746, GF: Markus Rex -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org