snapscan and aic7xxx driver don't work together

From: Ben Stanley (bds02@uow.edu.au)
Date: Tue Jun 26 2001 - 00:07:41 PDT

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    Hi,

    I recently changed SCSI card from an Adaptec aha152x based card to

    SCSI storage controller: Adaptec AHA-7850 (rev 1).

    using the aic7xxx driver. Unfortunately, my Acer Prisa 620s (snapscan
    backend) does not work with this scsi card, while it worked acceptably
    with the old one.

    Using aic7xxx driver and sane-backends-CVS-2001-06-17, I see in the log file

    when I load the aic7xxx driver:
    Jun 26 11:37:20 dragon kernel: PCI: Found IRQ 9 for device 00:0c.0
    Jun 26 11:37:20 dragon kernel: IRQ routing conflict in pirq table for
    device 00:0c.0
    Jun 26 11:37:20 dragon kernel: scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI
    HBA DRIVER, Rev 6.1.5
    Jun 26 11:37:20 dragon kernel: <Adaptec aic7850 SCSI adapter>
    Jun 26 11:37:20 dragon kernel: aic7850: Single Channel A, SCSI
    Id=7, 3/255 SCBs
    Jun 26 11:37:20 dragon kernel:
    Jun 26 11:37:20 dragon kernel: (scsi0:A:2:0): refuses synchronous
    negotiation. Using asynchronous transfers
    Jun 26 11:37:20 dragon kernel: Vendor: Color Model:
    FlatbedScanner_9 Rev: 0117
    Jun 26 11:37:20 dragon kernel: Type: Scanner
        ANSI SCSI revision: 02

    When I try to use XSane 0.78 to talk to the scanner, I get an IO error,
    and a message in the log about Jun 26 11:37:58 dragon kernel: Detected
    scsi generic sg0 at scsi0, channel 0, id 2, lun 0, type 6
    Jun 26 11:37:58 dragon kernel: (scsi0:A:2:0): refuses synchronous
    negotiation. Using asynchronous transfers
    Jun 26 11:37:58 dragon last message repeated 22 times
    Jun 26 11:37:59 dragon saned[1198]: access by
    saned-user@dragon.stanleys.uow.edu.au accepted
    Jun 26 11:37:59 dragon kernel: (scsi0:A:2:0): refuses synchronous
    negotiation. Using asynchronous transfers
    Jun 26 11:38:19 dragon last message repeated 8 times

    Now, this driver reports that my iomega zip drive also doesn't support
    synchronous negotiation, but it works with the other SCSI card. I
    suspect the fault may like with the SCSI card driver...

    However, I still wonder if sane supports asynchronous transfers?

    If you reckon this would be a kernel problem, do you have any
    recommendations as to where to report it?

    Thanks,
    Ben. 

    --
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