epson scanner and libusb

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

Do you print with sane/libusb???? I never knew that would be possible, I'm
using cups...
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Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

OOps, also my scanner is working, I just savd device info in xscanimage
and then it gives me glibc error if the scanner is off.
_________________
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If you're born distro, no matter what, start to run.
---- http://www.linuxprinting.org/ ---- http://tuxmobil.org/

Gentree · Posted: Wed Feb 09, 2005 5:53 pm Post subject:

sane is a scanner interface, I dont use it for printing.

libusb is a usb library which I do need to use my usb printer.

Trouble is this got blown out by a crappy update about a month ago and I have been unable to find out exactly what screwed it up.

Net result I dont print with Gentoo. Great desktop system without print capability.

Just installed win2k to have printing since I have wasted enough time on flakey cups/a2sp/ghostscript or whatever the hell has crapped out this time.

Bah ! :evil:

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nx12 · Apprentice Joined: 14 Jan 2004 Posts: 193

Somebody had any success in running xsane with epkowa backend?
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aricaldeira · n00b Joined: 04 Mar 2004 Posts: 6 Location: Brasil

Hi All,

I just got a Stylus CX4500 to work, both to print and scan. Printing was easy, I just installed pips-scx4500_4600-cups-2.6.2-2.i386.rpm (since I couldn't compile it from source), and the printer just worked. I use cups and kde.

Scanning was a bit harder, but I just checked out and there is a new version of iscan at http://www.avasys.jp/english/linux_e/dl_spc.html

Just downloaded it, installed it with

David916 · n00b Joined: 11 Dec 2002 Posts: 60 Location: My basement

I don't know if this was mentioned previously, but if anyone has the problem where sane-find-scanner, scanimage, sane, etc only work as root, check to see if there is a scanner group and add yourself to it if there is. I found that the permissions on the scanner device were as follows:

Headrush · Posted: Thu Jul 07, 2005 5:26 pm Post subject:

Check this for setting up permissions so non-root users can access devices when using libusb.
https://forums.gentoo.org/viewtopic-p-2545791.html#2545791

Depending on your versions of software and what scanner, this may or may not already be setup for you.
This guide should work when your next device that uses libusb isn't setup automatically, or you want to change or make a different group other than "scanner"

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

The only-root-access for libusb was there another time, my hackish fix is at https://forums.gentoo.org/viewtopic-p-3305680.html#3305680
_________________
Every day a new distro comes to birth. Every day a distro "eats" another.
If you're born distro, no matter what, start to run.
---- http://www.linuxprinting.org/ ---- http://tuxmobil.org/

picklestix · n00b Joined: 15 Jan 2005 Posts: 72

Thanks for your suggestions. Apparantly there is still issue with this scanner and libusb.

I posted something to sane-devel list and they told me to just get a firewire cable.

For anyone else with this scanner, it's the way to go.

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

radio_flyer

I see this thread has been going on for, what, 2 years? I am in exactly the same boat as Picklestix. I have a USB Epson 2450 scanner that worked *perfectly* on an old Debian 2.4 system. It absolutely refuses to function correctly on my stable x86 2.6.16 Gentoo system. I have been all over the web looking for the 'solution', and nobody seems to have a clue.

I know the hardware works flawlessly, because when I run the Epson scanner stuff on Win98 under VMWare the scanner works perfectly. Same box, same underlying kernel, same cable, same everything.

However, when I try to access the thing from Linux directly nothing works right, or consistently. I've checked the udev isn't creating any files other than bus/usb/XXX/YYY. The hotplug script (actually scripts, as iscan and sane both plop scripts in /etc/hotplug/usb) is setting permissions correctly on /proc/bus/usb/XXX/YYY. My user is in the scanner group. I've commented out every line in /etc/sane.d/dll.conf except for net, epkowa, and v4l. Nothing. I've also tried the sane-epson backend. Still nothing. I've tried using the iscan utility you can download directly from Epson using the link found on the sane-project.org web site. No go.

The issue seems to be similar to what many other people are experiencing. sane-find-scanner always finds the scanner:

cryos · Retired Dev Joined: 08 Mar 2003 Posts: 242 Location: US

I haven't used my scanner in months, and it was working, but I now seem to be suffering from the same issue. I am not an expert on scanning and libusb but doing a little investigation it works fine as root, my user is a member of the scanner group. The node in /proc/bus/usb/001/008 is -rw-rw---- 1 root scanner so all looks well there. Yet as my user the scanner is not accessible.

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

@cryos : check permissions doin "scanimage -L" as user in scanner group. If the scanner is not seen please check:
https://forums.gentoo.org/viewtopic-p-3311185.html#3311185 (a script OR a tutorial to manually setting
fine the udev rule of permission for the scanner, if you choose script turn on one scanner at time).
_________________
Every day a new distro comes to birth. Every day a distro "eats" another.
If you're born distro, no matter what, start to run.
---- http://www.linuxprinting.org/ ---- http://tuxmobil.org/

cryos · Retired Dev Joined: 08 Mar 2003 Posts: 242 Location: US

Thanks for the help Matteo! Finally got it working as my user and the secret is the permissions in /dev/bus/usb/ that were incorrect. Check out bug 50934 for more details. Hopefully this will get resolved soon - I will see if I can figure out anymore on the weekend if no progress has been made.

Thanks once again Matteo!

djs · Posted: Thu Sep 07, 2006 7:40 pm Post subject: The real fix for these problems

The real fix for these problems is to remove coldplug from your default runlevel. If coldplug is running, it will detect the usb device and put it in /dev/bus/usb/... with root:root permissions. Hotplug, however, seems to do the job correctly, with root:usb permissions.

engineermdr · Posted: Sat Jan 27, 2007 5:08 pm Post subject:

I've been trying half the day to get my once working Epson Stylus CX5400 scanner working again. I'm not even at the permissions problem yet, running everything as root. I've followed the howto and the suggestions in this thread. I have the infamous

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

engineermdr · Posted: Sun Jan 28, 2007 7:18 pm Post subject:

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

The only other possible "easy fix" that comes in my mind is to check that
you specified the right backend in /etc/make.conf ......

However IMHO is really strange that root doesn't gets the scanner with scanimage -L ,
this means is not a permission issue (that's 98% of the errors) but something else.....
_________________
Every day a new distro comes to birth. Every day a distro "eats" another.
If you're born distro, no matter what, start to run.
---- http://www.linuxprinting.org/ ---- http://tuxmobil.org/

engineermdr · Posted: Mon Jan 29, 2007 2:07 pm Post subject:

Yep, like I said in my first post, I'm way before dealing with permission problems.

Seems like the only clue is my message in the system log:

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

engineermdr · Posted: Wed Jan 31, 2007 8:06 pm Post subject:

lyhana8 · n00b Joined: 28 Feb 2007 Posts: 31 Location: France

1) I have no idea how to install my scanner (espon perfection 1670) on -any- linux ;
2) some quick read give me a working scanner as root (I don't know how to give right to my user on gentoo

;
3) I'm not an expert so I try many think, maybe useless, but at least that work (don't follow this think it's bad X) ;
So i follow these step :

I add the usb USE in my /etc/make.conf

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

figueroa · Posted: Thu Oct 29, 2009 6:26 pm Post subject:

This may be helpful to some of you, even though this is an old thread. I got my Epson Perfection 3170 working correctly with the software provided by avasys: See: https://forums.gentoo.org/viewtopic-p-6035076.html#6035076
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