[sane-devel] loosing contact to scanner

Jim Newton jimka@rdrop.com
Wed, 22 May 2002 18:27:48 +0200

hi all,

i have successfully (seemingly) installed my snapscan e40 agfa
scanner to my redhat linux 7.2 system.  and i'm able to scan
images as long as i like.  but overnight, the system seems to
forget something.

the next day, when i try it again, when xsane tried to find the scanner,
the green light on the front just flashes on and off for 5 or 10 minutes
then quits.  i.e., overnight i leave the system running, (the scanner
no on/off switch) and i leave xsane running, simply walk away from the
system for 10 hours or so

here is the contents of /proc/bus/usb/devices when this has occured.
Notice the I: line.  Driver=hub.  i belive it used to be
while it was scanning correctly.

[jimka@localhost usb]# cat /proc/bus/usb/devices
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 0.00
S:  Product=USB UHCI Root Hub
S:  SerialNumber=d400
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

anyone have an idea what is happening, and how i can fix it short
of rebooting every day?