more about the DC390T problem (was: pre0.62 patch)

Kolja Waschk (kawk@Home.Yo.COM)
20 Jul 97 04:28:31 +0200

DM> Kolja, this patch also changes how command cancellation works quite
DM> a bit (due to the SCSI queueing that the Mustek backend now uses),
DM> so you might want to give it a shot. However, I suspect the real
DM> problem is that the Tekram driver uses too big a timeout to
DM> determine whether a device is busy.

The modification you made in do_stop (formerly do_cancel) now allows clean
abort during setup phase (before data is transferred) with the Tekram driver.

A stop during the scan still requires the delay as I described earlier.

Anyway, I now use the generic AM53C974 driver instead of the Tekram specific
one. And, viola, it works all, without modifications. ( I used the AM53C974
driver first, but probably didn't get it right to specify the device to use
and SANE thought my scanner was a Microtek or whatever, doing a lot of
nonsense. Later I found out I have to specify the device on the scanimage
command line or change the backend include list in the Makefile, but before
that I already switched to the Tekram driver and didn't dare to switch back...
that's the story why I didn't try the generic driver earlier )

This proves the Tekram driver being buggy.

bibi,
Kolja

---
Kolja Waschk (kawk@Home.Yo.COM)
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