On 12-Sep-97 becka@sunserver1.rz.uni-duesseldorf.de wrote:
>I have received 4 private replies to that EMail, so it seems to be a common
>problem we should try to track down.
I agree. We should keep it here on the list.
>From the information I have received, it looks like it doesn't depend much on
>the SCSI adaptor/subsystem. I have had reports from NCR53c400 and 53c810
>plus some more which didn't tell me the adaptor. Can anyone confirm, that it
>is not an NCR related problem ?
Well, I can. I'm running the scanner on an Adaptec AHA-1542CF.
It's the only device on that host adaptor, so a locked SCSI bus shouldn't be
the problem.
For all those in Germany: I have a description of how my scanner is set up on
my homepage, URL http://home.t-online.de/home/ritzert.
I will update it today to include a short report on this issue.
>The first idea I had was that maybe something (the scanner) is hogging the
>SCSI bus for too long and resetting fails. However the hang seems to be
>real hard, as my /var partition resides on an IDE HD and should thus be
>able to log, even if the SCSI-Bus hangs. But what I get is :
>
>Aug 17 17:15:15 gate kernel: Detected scsi generic sga at scsi0, channel 0, id
>6, lun 0
>Aug 17 17:17:50 gate kernel: Kernel logging (proc) started.
>
>I.e. no error messages between opening the device and the crash.
This seems to be another common behaviour: There are no log entries in
/var/log/messages that show that something went wrong.
>We should investigate further, as the effect seems to have been introduced
>by SANE. I have not seen such problems with mscan and muscan.
>
>Several possibilities for the cause come to my mind :
>
>- I will try to use the strip-height option to see, if disconnect times are
> the problem.
I've tried this and it works better now: the scanner doesn't hang in
the middle of the page but at the end of it :-/
>- Moreover it would be nice, if we could check if the problem is reproducible
> for given parameter sets. So if you see such a hang, write down the command
> line (for scanimage) and retry. If it reproducibly hangs, please post the
> parameters, so we can cross-check and maybe find a rounding-error or
> something the like in the code.
Could everybody who has a Mustek scanner please try out this command:
scanimage --device mustek:/dev/scanner -l 5 -t 5 -x 190 -y 270 --resolution 200
--mode Lineart --speed Fastest
This is how I first hit this problem.
Ciao, Michael
---
_
|\/|_) -=>Ritzert@T-Online.de <=-
| | \ *Michael Ritzert* - http://home.t-online.de/home/ritzert
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