epson scanner and libusb

patrickfo · Posted: Thu Feb 26, 2004 9:25 am Post subject:

i have a epson scanner perfection 1660 photo and see what i have done to make it work:

1) in dll.conf # before all backends except epson
2) in epson.conf i put usb VENDOR PRODUCT for me:

Sudrien · Posted: Sat Feb 28, 2004 12:10 am Post subject:

patrickfo · Posted: Sat Feb 28, 2004 3:25 pm Post subject:

i have tried 2.6.4-rc1 to see if pb disapeared but... no
so i have walked the web with google and found that sane-backend was not for my scanner

see http://www.buzzard.org.uk/jonathan/scanners-usb.html for more info
and then found that a backend and a frontend was written for it

see http://www.epkowa.co.jp/english/linux_e/index.html
i am not at home for now, but i will give it a try this night, or perhaps tomorrow :roll:

ah, and for 2.6.4-rc1 my scanner is allways found by sane-find-scanner but only found with "usb libusb:XXX:XXX" in epson.conf
scanimage -L return immediatly with "no scanner found..." if no "usb..." line and after a long delay and the same answer if "usb VENDOR PRODUCT"...

and only epson.conf is uncommented in dll.conf
friendly
ps: it seems that for some epson scanners, plustek backend works, but not for mine

lyz · n00b Joined: 17 Feb 2003 Posts: 14

dopey · Apprentice Joined: 10 Feb 2003 Posts: 235

I'm having the same problem with an Epson 1660 USB scanner and 2.6.3 kernel. I haven't been able to get it to work since going to a 2.6.x kernel. Worked fine with the old scanner module in 2.4.x.

scanimage -L and sane-find-scanner both find the scanner. My epson.conf file is configured with the proper device id and everything. The hotplug scripts are properly setting the permissions on the /proc nodes.

However scanimage -T fail. xsane detects the scanner, but when i try to scan or acquire a preview it just hangs with a bunch of the same error messages in my kernel log. I've tried libusb 0.17 and 0.18 with no luck.

What kernel version were you able to revert to in order to get this to work?

okram · Posted: Mon Mar 08, 2004 8:43 am Post subject:

I'm also still battling with this problem, with an Epson 2400 Photo. I'm using development-sources 2.6.4-rc1, libusb-0.1.8, sane-backends-1.0.13-r3, but have tried downgrades in various permutations

I've written an executable script called epson_scanner in /etc/hotplug/usb/, with logger lines inserted to check when and whether the script is called. It is, and works: soon as I turn on the scanner, the permissions on the device are changed. In dll.conf all but epson.conf are commented out. In epson.conf only the line "usb 0x04b8 0x011b" is uncommented.

1) sane-find-scanner finds the scanner.
2) scanimage -L doesn't. Or rather, it mostly doesn't find the scanner -- plenty of log messages about "bulk timeout on ep1in" and "usbfs: USBDEVFS_BULK failed dev 3 ep 0x81 len 4 ret -110" -- but sometimes does after more than two minutes wait and, on rare occasions, finds it immediately.
3) When scanimage -L finds the scanner, xsane will start and recognise the scanner by its internal name GT9300, but scanning will fail with "Failed to start scanner. Error during device I/O."

Any help?

okram · Posted: Mon Mar 08, 2004 11:45 am Post subject:

Well, just to let others know who might have the same problem: after downgrading libusb to libusb-0.1.7-r1 and recompiling sane-backends-1.0.13-r3, it now works. Also recompiled kdegraphics, media-gfx/xsane-0.91 and sane-frontends for good measure.

It's still painfully slow, but works.

dopey · Apprentice Joined: 10 Feb 2003 Posts: 235

so wanna hear something crazy

. scanimage fails. scanimage -L finds the scanner, but it refuses to scan.
However now xscanimage and xsane both work properly unless the scanner goes to sleep (light goes off). if the scanner is sleeping and i fire up xscanimage or xsane, it hanges the programs for a couple of minutes before they finally start up and things work.

however, CLI scanimage does not work at all. I did nothing to change anyhthing other than set a bunch of SANE_DEBUG_* environment variables.
I'm wondering if part of the DEBUG stuff sent some kind of extra initialization to the scanner. I'm planning on powering the scanner down and rebooting tonight to see if my luck holds.

tucolino · Tux's lil' helper Joined: 12 Jun 2003 Posts: 90

got my perfection 1260 working with linux-2.6.3-gentoo-r1.

it works with both iscan and xsane. for xsane, i am using the plustek backend. make sure that you have "plustek" in /etc/sane.d/dll.conf

for iscan, which i find better with coors, you need ot make sure that /etc/sane.d/dll.conf has "epkowa" in it. also, it is also important that you add "usb libusb:004:002" to /etc/sane.d/epkowa.conf

hope this helps.

tuco
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http://www.xenodium.com/blog
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patrickfo

i don't change anything from my previous post and now it work with kernel 2.6.5-rc3 even if i plug and unplug the scanner and IMMEDIATLY and VERY WELL like before module was removed from kernel

just try it and tell us
ps: i am in ~x86 with hotplug-20040329
good luck

alfie · n00b Joined: 26 Feb 2004 Posts: 2

I have a similar problem in 2.6.4-gentoo-r1 with a usb scanner (Epson 2450, libusb) where scanimage -L is flakey, and scanning is erratic and slow, sometimes freezing up the entire usb system. (My other usb devices no longer are accessible) I use Epson's iscan, scanimage -L, xsane. epson or epkowa backend.

tail -f /var/log/messages reveals timeout errors with the scanner.

Here is a reference to a post in linux-usb-users, where the errors went away when hotplug was disabled.

http://www.mail-archive.com/linux-usb-users@lists.sourceforge.net/msg09945.html

Säck · Posted: Sat Apr 24, 2004 3:53 pm Post subject:

Hi,
After reading this post, I got my scanner partially working.
I can scan now as root, but I just don't get to change the permissions automatically.
I tried with the script:

the file is stored under /etc/hotplug/usb/epson_scanner and is executable.

patrickfo · Posted: Sat Apr 24, 2004 7:01 pm Post subject:

try to:

Säck · Posted: Sat Apr 24, 2004 7:52 pm Post subject:

patrickfo · Posted: Sat Apr 24, 2004 9:10 pm Post subject:

seems that something wrong in hotplug:
in fact i have epson_scanner in 2 places:
1) /etc/hotplug/usb/epson_scanner
2) /etc/hotplug/epson_scanner

surely a mistake when i installed my scanner

but... if i remove the second,
perms are unsets UNTIL I DO under root:

Säck · Posted: Sun Apr 25, 2004 11:08 am Post subject:

@patrickfo:

No luck.

I'm wondering what could be the cause of that.
Maybe the kernel I use? I'm using 2.6.6-mm6 with some ieee1394 and the move-__this_module-to-modpost.patch patch so that i can load the nvidia dirvers.
But I seriously have no idea what could be the cause.
I still use libusb-1.7-rc1 but I don't think this is the cause. I was thinking about upgrading to version 1.8 as you suggestet, but I couldn't find the programm:

Säck · Posted: Sun Apr 25, 2004 4:18 pm Post subject:

changed to the 2.6.6-rc1 kernel, same problem (i didn't think that this is the case)

I'm wondering if i should see any output in /var/log/messages when i plug in the scanner (like which scripts are executed or something)
is there a log-file i can watch and see what hotplug is doing?

i also realized that i had some hex numbers in the usb.usermap set to the wrong amount of bytes, I changed it, but it didn't do anything. It looks now like that:

patrickfo · Posted: Sun Apr 25, 2004 5:44 pm Post subject:

ok Säck
perms are the flags you change with chmod chown or chgrp, that is what the script epson_scanner do

revdep-rebuild belong to gentoolkit and is needed when you upgrade some package needed by other packages: it find libraries needed by a package and no more present on your computer. exemple libusb-0.1.so.3 replaced by libusb-0.1.so.4 ( perhaps;) ) by upgrading to libusb-1.8.
to merge libusb-1.8 do an

Säck · Posted: Fri Apr 30, 2004 2:06 pm Post subject:

as a matter of fact, i don't get it to work.
I don't know why, but i agree that it's a problem with "perms" :lol:

wow, i learned something, thanks. well, i tried with different kernels, with different version of libusb and hotplug, no luck.

anyone an idea?
_________________
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twilight · Posted: Wed May 05, 2004 2:10 pm Post subject: still no solution here

Hi folks,

ive got the same problem and i have still
no solution!

Neither creating a scanner-group and changing
the permissions nor creating a hotplug-script
or else brought a solution to me!

My usb is working fine... digi-cam, printer, mouse...
since the new kernel i have to use libusb... okidoke...
as root "sane-finde-scanner" is able to find the scanner

Gentree · Posted: Wed May 05, 2004 8:43 pm Post subject:

Hi ,

you need to post the contents of /proc/bus/usb/002, we cant see the scanner device from your post.

BTW what kernel are you running?

twilight · Posted: Wed May 05, 2004 9:55 pm Post subject:

Hi,

sure, i`ve done everything as root and i am aware that the
permissions will reset after reboot, but for that i could use
that hotplug-script...

after a reboot the content of my /proc/bus/usb/002
looks like:

twilight · Posted: Wed May 05, 2004 10:20 pm Post subject:

hi again,

so, now that i got this "to work" i created that bootscript
and it seems to work fine... the permissions are set exactly
the way they need to be!

But still there`s the problem with "can not start scanner: device busy"

Maybe anybody has an idea for that??

Greetings,

twilight
_________________
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Gentree · Posted: Wed May 05, 2004 10:42 pm Post subject:

OK, you have moved forwards.

However the device busy is another issue intirely. The usb is there and the hotplugging is working and you have all the permissions correct. So in this respect your system is setup correctly.

When you said your scanner was working as root , I thought you meant your scanner was *working*.

Sadly I have exactly the same pb !! :evil:

I did have this hardware working at one stage and got decent scans so there is hope for this scanner. Hwvr, something changed and I got back to the "device busy" syndome.

I have been changing loads of stuff around trying to get various hardware sorted so I am unable to say exactly what borked the scanner driver or to go back to a working state.

What I can tell you is that it was recent ck-sources that got it working.

Usually I use love-sources and it was when I first tested ck that it magically fixed the scanner. It didnot last though and I now have exactly the same pb with ck sources as well.

You may like to try ck and see if it does some magic for you, it is reputed to be good on difficult usb pbs.

If something changes for you let me know. I would love to get my scanner working again but it isnot my top priority. :cry:

PS check you hotplugging script by pulling the usb lead and replugging , you should see the scanner move to 002/003 , checks perms.

kurtb · n00b Joined: 05 Nov 2003 Posts: 23

Ok, here is what I did to get my Epson Perfection 2400 Photo usb scanner going. First off I'm running 2.6.5-gentoo-r1, libusb-0.1.8, sane-backends-1.0.13-r3, and xsane-0.91.

My /etc/saned/epson.conf looks like: