[sane-devel] loosing contact to scanner (warmup problem?)

[Oliver Schwartz]

Hi,

> hi, after my scanner has been on for a couple of days,
> including xsane running the entire time.  no restart, no reboot.
>
> a scanner is still found in /proc/bus/usb/devices (see below),
> but sane-find-scanner can no longer find it, and xsane can no longer
> connect to it.  and after sane-find-scanner no longer finds the
> scanner, then /proc/bus/usb/devices no longer knows what kind
> of scanner it is.  notice earlier the lines
> S:  Manufacturer=AGFA
> S:  Product= SNAPSCAN e40
> appear in /proc/bus/usb/devices, but afterward they no longer appear
> there....
> NOT EVEN modprobe  scanner vendor=0x06bd product=0x208d
> fixes the problem.  i believe it starts working again, if i reboot
> and then run modprobe  scanner vendor=0x06bd product=0x208d

It seems that this is either a Linux kernel bug or a scanner problem. Can you 
try to unload your usb driver module (usb-uhci, usb-ohci or similar)? Does it 
make any difference if you unplug and replug the USB cable?

Regards,

Oliver