Re: No /dev/sg*, no scanner found, with Linux 2.4.1

From: Damon McGraw (damon@watchland.org)
Date: Thu Feb 15 2001 - 19:01:22 PST

  • Next message: Mick Barry: "Resetting scan are options tlx,tly,brx,bry"

    You need to create the SCSI generic nodes in /dev.
    try:
    cd /dev
    MAKEDEV sg

    hope that helps,
    Damon

    ++ 15/02/01 17:47 -0800 - David M. Anderson:
    > SANE doesn't seem to find my scanner, but I don't think the problem is
    > really with SANE. Nevertheless, this seems to be a good place to ask
    > about scanners and Linux. Perhaps someone can help me.
    >
    > Running Debian GNU/Linux 2.2, with a compiled 2.4.1 kernel. Among other
    > things, SCSI generic support is enabled.
    >
    > Possibly relevant portions of output from "dmesg":
    > CPU: Intel Pentium II (Deschutes) stepping 02
    > Board Vendor: ASUSTeK Computer INC..
    > Board Name: P2L97-S.
    > Board Version: REV 1.xx.
    > SCSI subsystem driver Revision: 1.00
    > PCI: Found IRQ 9 for device 00:06.0
    > PCI: The same IRQ used for device 00:04.2
    > (scsi0) <Adaptec AIC-7880 Ultra SCSI host adapter> found at PCI 0/6/0
    > (scsi0) Wide Channel, SCSI ID=7, 16/255 SCBs
    > (scsi0) Downloading sequencer code... 422 instructions downloaded
    > scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.2.1/5.2.0
    > <Adaptec AIC-7880 Ultra SCSI host adapter>
    > Vendor: UMAX Model: Astra 1200S Rev: V2.6
    > Type: Scanner ANSI SCSI revision: 02
    > Detected scsi generic sg3 at scsi0, channel 0, id 6, lun 0, type 6
    >
    > /proc/scsi/scsi includes:
    > Host: scsi0 Channel: 00 Id: 06 Lun: 00
    > Vendor: UMAX Model: Astra 1200S Rev: V2.6
    > Type: Scanner ANSI SCSI revision: 02
    >
    > /proc/scsi/sg/device_hdr:
    > host chan id lun type bopens qdepth busy
    >
    > /proc/scsi/sg/devices includes:
    > 0 0 6 0 6 0 3 0
    >
    > (I also three other SCSI devices, a Zip drive, Jaz drive, and CD-R, on
    > IDs 3, 4, and 5, but they seem to be working fine.)
    >
    > So it seems clear that the UMAX scanner is detected by the kernel, and
    > classified correctly as a scanner, sg3 in particular.
    >
    > /etc/sane.d/umax.conf:
    > scsi UMAX * Scanner
    > scsi LinoHell Office
    > scsi LinoHell Office2
    > scsi LinoHell SAPHIR2
    > scsi Nikon AX-210
    > /dev/scanner
    >
    > /usr/lib/sane contains libsane-umax.so.1.0.1 (libsane-umax.so.1 links to
    > this).
    >
    > On the other hand:
    >
    > $ ls /dev/sg*
    > ls: /dev/sg*: No such file or directory
    >
    > $ sudo find-scanner -v
    > find-scanner: searching for scanners:
    > find-scanner: checking /dev/scanner... failed to open
    > find-scanner: checking /dev/sg0... failed to open
    > find-scanner: checking /dev/sg1... failed to open
    > find-scanner: checking /dev/sg2... failed to open
    > find-scanner: checking /dev/sg3... failed to open
    > find-scanner: checking /dev/sg4... failed to open
    > ...
    >
    > $ scanimage --list-devices
    >
    > I am obviously missing something. Does anyone know what it is?
    >
    > Thanks,
    > Dave
    >
    >
    >
    > --
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