[sane-devel] 2.4.16 freeze on opening /dev/usb/scanner0
Marcio Luis Teixeira
marciot at holly.colostate.edu
Wed Dec 12 00:09:38 GMT 2001
Hi,
Recently I upgraded the kernel on my RedHat 7.1 system to version 2.4.16
so
I could begin testing the Umax1220u driver under that kernel (using the
sanei_usb interface).
However, I seem to have run into an unexpected problem. Whenever I try
to access /dev/usb/scanner0 (or /dev/usbscanner) it freezes my entire
system.
At first I thought my driver was misbehaving, but apparently even if I
do a
tail on the device file, it is enough to freeze the system:
bash:# /sbin/modprobe uhci # Have this set
up as a module
bash# tail /dev/usb/scanner2 # I only have
one scanner...
tail: /dev/usb/scanner1: No such device # ...ok, this is
expected.
bash# tail /dev/usb/scanner0 # This
*completely* freezes the machine
In my old kernel (2.4.2) this was never a problem. Any ideas what might
be
going on? How can I turn on debugging and get some more meaningful
information about this?
Marcio Luis Teixeira
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