[sane-devel] HP ScanJet 4100C - assertion failed

[Peter Kirchgessner]

Hi,

the debug log shows lots of times a "read failed. End of file reached". 
Please try the current CVS-version of the hp-backend. I just added a 
retry for that case.

You can also try to get around the USB-scanner module and work directly 
with libusb. This sometimes works better. Make sure that the module 
scanner is not loaded. Rename the object 
/lib/modules/2.4*/kernel/drivers/usb/scanner.o to scanner.o_save
Then connect the scanner with your machine. It should be recognized. Try 
to scan.

Sincerely

Peter

Yves Martin schrieb:
>    Hello,
> 
>  I'm trying to use my usb scanner 4100C to my Linux - vanilla 2.4.21
>  with some patches (software suspend, ACPI, ntfs, supermount)
>  I have checked that the USB scanner module is available.
> 
>  When I connect my scanner, it appears in /proc/bus/usb/devices and the
>  'scanner' driver in /proc/bus/usb/drivers. I'm using devfs and devusbfs.
> 
>  I have libusb 1.6a (from Mandrake 9.1), I have compiled sane-backends
>  from sources 1.0.12 in /usr/local and my /usr/local/etc/sane/hp.conf
>  contains  "usb 0x03f0 0x0101"
>  [ I have removed packages with old sane backends from Mdk 9.1 to avoid
>    conflicts ]
> 
>  So I ran sane-find-scanner:
> checking /dev/usb/scanner0... open ok, vendor and product ids were identified
> found USB scanner (vendor=0x03f0, product=0x0101) at /dev/usb/scanner0
> 
>  Then scanimage -L  aborts with the message:
> scanimage: hp-option.c:3661: hp_optset_fix_geometry_options: Assertion `tl_x && 
> tl_y && br_x && br_y' failed.
> Aborted (core dumped)
> 
>  The first run of scanimage is fast - and core dumped. The second run is really,
>  really slow - but core dumped too with the same message.
>  Then the device does not appear any longer:
>  /dev/usb/scanner0 does not exist ?? connect/disconnect changes nothing ??
>  I have to reboot my Linux to get back the device !!
> 
>  What's wrong ? Do I have to patch something in my kernel ?
> 
>  In attachment, the complete scanimage -L stdout/sdterr with
>  SANE_DEBUG_HP=17 
> 
>  Thank you in advance for your help


-- 
Peter Kirchgessner
http://www.kirchgessner.net
mailto:peter at kirchgessner.net