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

TomF TomF@sjpc.org
Mon, 23 Jun 2003 10:12:51 -0700

On Redhat 9.0 with all Up2date patches installed, I uninstalled
sane-backends and installed sane-backends-1.0.12-1asp.i386.rpm.  When I
ran xsane with ADF enabled, my HP7450C scanner, which is connected
via usb, fed about 5 inches of the first document into the ADF, went
into Initializing mode, and hung.  I reproduced the problem with export
SANE_DEBUG_AVISION=7, and sent a problem report to rene.rebe@gmx.net on
Fri, 20 Jun 2003.  I haven't received a response yet, and Rene appears
to be on vacation: no activity since June 11.

Yesteroday, I uninstalled sane, xsane-0.89-3, xsane-gimp-0.89-3,
sane-frontends-1.0.9-2, and kdegraphics-3.1-5, and installed
sane-backends-1.0.12.tar.gz and xsane-0.91.tar.gz.  I got the same
behavior when I ran xsane with ADF enabled.  After hanging for a long
time, sometimes a device disable error message is sent to the log,
sometimes not.

I am wondering if there is a SCSI/USB conflict.  The usb/scsi emulation
is supposed to be obsolete, but I found the following on my system:

/var/log/messages shows kernel: Attached scsi generic sg5 at scsi1,
channel 0, id 0, lun 0, type 6, during system startup.  The Hardware
Browser lists the scanner as sg5.

/proc/bus/usb/devices contains:  
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
T:  Bus=04 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=03f0 ProdID=0801 Rev= 0.01
S:  Manufacturer=hp
S:  Product=hp scanjet 7400c
S:  SerialNumber=87 tem  7400c

I have been unable to determine precisely what is wrong with my
configuration.  Where should I look for the way to properly configure my