> The problem is that according to /proc/scsi/scsi both scanners (UMAX
> Astra 1220 & Canon 2710) are known to the system .
Hmm - according to the SANE Web pages, only the CanoScan 300,600 and 2700F
are known to be supported. From the information I can only tell, that your
scanner might work, work partially or not work at all. Maybe there is
someone with more recent information on the support of that particular
type of scanner her on the list ?
> but if I choose the Canon scanner in the xscanimage-device-dialog, the window
> pops up, and if I hit the "Aquire preview" button an error message appears
> saying something about an I/O error.
That might be related to the Scanner type mismatch. However the backend
should usually check if the scanner is known. It can also be related to
your possible HW problem below.
> After fiddling around with this for a while strange effects appeared:
> The machine (Win98 & Linux are installed) is only booting one
> out of 5 or 6 times.
Did you turn the scanner off before rebooting ? If the scanner is not quite
compatible with the supported ones, it might be left in a hell of a confused
state, which can also confuse the SCSI BIOS.
> Sometimes it hangs after the scsi-devices are probed by the controler (even
> before the lilo-menue) sometimes it freezes right after the
> fsck etc. After several reboots I suddenly had nice little graphics on the
> screen instead of bios-messages or the bootmessages...
That sounds pretty much like a very confused SCSI subsystem. There are two
possible reasons for that:
A device that has gone mad or bad termination.
> problem I obviously have. I think this must be a problem of the tecram
> controler or the wires or what ever, but not of the sane-configuration?!
Check if turning all devices (including the host) off for a couple of
seconds (at least 10 or so) and then turning them all back on helps.
If it then boots cleanly, chances are, that some device was very confused
(probably the the canon scanner) and made trouble on the bus.
If you still have problems, chances are, that you have a termination or
wiring problem. IIRC this has been discussed at length in this group before,
so only the most important points:
1. The bus must be straight through. No Y-shaped branching of the bus.
2. The bus must be terminated at both ends, really at the ends (i.e. don't
let the cable go on, put the last device on the last connector and turn on
termination on the last device), and only thre (i.e. exactly two devices
should have termination on. Host-adaptors are often missen in that count.
If the Adaptor is in the middle, don't terminate it, if it is at the end, do).
Keep the bus short. This depends on how good your cables are, how fast
you drive the bus, ... The shorter the better.
-- Andreas Beck | Email : <Andreas.Beck@ggi-project.org>
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