[sane-devel] HP 7450C libusb problems

Henning Meier-Geinitz henning@meier-geinitz.de
Sun, 6 Jun 2004 21:12:18 +0200


On Sun, Jun 06, 2004 at 08:25:52PM +0200, Henning Meier-Geinitz wrote:
> > Yes this seems to be a pretty broad issue with sane/libusb and more recent  
> > 2.6.x kernels

As already mentioned on this list and in the bug tracking system
scanning fails with libusb if the scanner is accessed during that
scan. This access can even be caused by sane-find-scanner.

Maybe these two problems are in fact the same? E.g. when some
hotplugscript tries to access the scanner while it's opened by sane?

I don't know if it's at least theoretically possible to cause the
double access bug by a bug in sane. As the libusb device is claimed by
sane, it shouldn't be possible to send anything to the device while
the interface is claimed.