[sane-devel] HP 7450C USB scanner failure with ADF

[Thomas Frayne]

On Wed, 2003-06-25 at 13:52, Henning Meier-Geinitz wrote:

> Is the scanner found as USB device now? Something like "libusb:001:002"?
> 
> Please show us "sane-find-scanner -q".
> 
> I have to admitt that I'm a bit confused by the backend. It uses USB
> interrupt transfers to get the status of the scanner. However that
> only works with libusb, not the kernel scanner driver. So I don't
> really know why the backend lists "usb /dev/ubs/scanner" in
> avision.conf. Maybe the maintainer can enlighten me :-)
> 
> The name "usbdevfs" is obsolete. It's called "usbfs" now. But that's
> not your problem.

> Usually the config files list all devices and device files the backend
> supports. So it doesn't matter if there are additional ones.
> 
> The backend checks for all USB devices anymway, I don't think the
> entries in avsion.conf are necessary at all.

> rmmod scanner
> modprobe scanner vendor=0x03f0 product=0x0801

> Some distributions use(d) /dev/usbscanner, some use /dev/usb/scanner0.
> Shouldn't matter in your case.
> 
> > Jun 24 13:37:51 localhost kernel: hub.c: new USB device 00:07.2-1, assigned address 2
> > Jun 24 13:37:51 localhost kernel: usb.c: USB device 2 (vend/prod 0x3f0/0x801) is not claimed by any active driver.
> 
> That's your scanner. It's ok that it's not "claimed by any active
> driver" because in this case it's used by usbfs (libusb). You can also
> try to load the USB scanner driver as mentioned above. Then you should
> get a message from that driver.
> 
> I recommend to unplug/replug your scanner before any test. Otherwise
> it may be confuded by eralier tests.
> 
> > [root at localhost root]# ls -l /dev/usb/scanner0
> > crw--    1 tom      root     180,  48 Jan 30 02:24
> > /dev/usb/scanner0
> 
> That's ok. YOu can add a link /dev/usb/scanner to that one but I don't
> think it's necessary.
> 
> > /proc/bus/usb/devices
> 
> Those entries start with "T:" (topology).
> 
> >  48- 63: usbscanner
> 
> Is loaded but doesn't know about your scanner.
> 
> Bye,
>   Henning


I snipped what now seems taken care of.  Here is a summary of the
current state:

modprobe scanner vendor=0x03f0 product=0x0801
Jun 26 08:05:09 localhost kernel: usb.c: registered new driver
usbscanner
Jun 26 08:05:09 localhost kernel: scanner.c: USB scanner device
(0x03f0/0x0801) now attached to scanner0
Jun 26 08:05:09 localhost kernel: scanner.c: 0.4.12:USB Scanner Driver
Modified /usr/local/etc/sane.d/avision.conf to add 
usb  /dev/usb/scanner0
[root at localhost root]# sane-find-scanner
found USB scanner (vendor=0x03f0, product=0x0801) at /dev/usb/scanner0
found USB scanner (vendor=0x03f0 [hp], product=0x0801 [hp scanjet
7400c]) at libusb:004:002
[root at localhost root]# scanimage -L
No scanners were identified.
Hardware Browser found no scanners.

Modified /usr/local/etc/sane.d/avision.conf to add
usb  0x03f0 0x0801

This made scanimage -L work after rebooting, both in root mode and user
mode:

device `avision:libusb:004:002' is a Hewlett-Packard ScanJet 7400c
flatbed scanner 

I shutdown, powered off the scanner, rebooted, ran xsane, and started a
scan.  The scanner hung as before, and the following appeared in
messages.

Jun 26 11:34:14 localhost modprobe: modprobe: Can't locate module
char-major-81
Jun 26 12:11:41 localhost last message repeated 4 times
Jun 26 12:11:41 localhost last message repeated 3 times
Jun 26 12:18:37 localhost kernel: usb_control/bulk_msg: timeout
Jun 26 12:18:37 localhost kernel: usbdevfs: USBDEVFS_BULK failed dev 2
ep 0x82 len 1 ret -110
Jun 26 12:19:07 localhost kernel: usb_control/bulk_msg: timeout
Jun 26 12:19:07 localhost kernel: usbdevfs: USBDEVFS_BULK failed dev 2
ep 0x83 len 22 ret -110
Jun 26 12:19:37 localhost kernel: usb_control/bulk_msg: timeout
Jun 26 12:19:37 localhost kernel: usbdevfs: USBDEVFS_BULK failed dev 2
ep 0x1 len 6 ret -110
Jun 26 12:20:07 localhost kernel: usb_control/bulk_msg: timeout
Jun 26 12:20:07 localhost kernel: usbdevfs: USBDEVFS_BULK failed dev 2
ep 0x82 len 1 ret -110
Jun 26 12:20:37 localhost kernel: usb_control/bulk_msg: timeout
Jun 26 12:20:37 localhost kernel: usbdevfs: USBDEVFS_BULK failed dev 2
ep 0x1 len 6 ret -110

I tried to change all occurrences of usbdevfs in my /etc (fstab,
hotplug/usb.rc, mtab, rc.d/rc.sysinit, rc.sysinit) to usbfs, but
something went wrong, and my system became unbootable.  I restored my /
and /var partitions.  

Now I am pretty sure that my problem is in usbdevfs, but I don't know
how to fix it.  

What can I try next?