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

[m. allan noah]

On Thu, 9 Oct 2003, Peter Kirchgessner wrote:

> 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.

this does not work on rh9, the scanner.o_save module will still be 
added to modules.usbmap when the box boots, and it will actually modprobe 
the module, even with the changed name, after the next re-boot. i would 
recommend that you move the object up to /lib/modules/`uname -r`

allan

> 
> 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
> 
> 
> 

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