kopia lustrzana https://gitlab.com/sane-project/backends
122 wiersze
4.7 KiB
Plaintext
122 wiersze
4.7 KiB
Plaintext
Information about SCSI scanners:
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================================
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Under Linux, your kernel must have generic SCSI support (sg) as well as a
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driver for your SCSI adapter. You may want to increase the SCSI buffer size
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to increase scan speed. Details on all of the above can be found in
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sane-scsi(5).
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If your SCSI and sg driver are build as moduls you will need to load them
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with modprobe:
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# modprobe your-driver-name
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# modprobe sg
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You may find error messages in /var/log/messages. Look at the documentation
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for your SCSI driver. Maybe you need to add options like the io port.
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Now the SCSI adapter and your scanner should be visible at /proc/scsi/scsi.
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Example:
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# cat /proc/scsi/scsi
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Host: scsi0 Channel: 00 Id: 06 Lun: 00
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Vendor: SCANNER Model: Rev: 2.02
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Type: Scanner ANSI SCSI revision: 01 CCS
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In this case the real vendor and scanner name are not shown (Mustek
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Scannexpress 12000SP) but SANE will detect it nevertheless.
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If your scanner is supported by SANE, scanimage -L will list it now:
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# scanimage -L
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device mustek:/dev/scanner' is a Mustek ScanExpress 12000SP flatbed scanner
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If this doesn't work you may have to add the right SCSI generic device name
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to the configuration file. This should be documented in the man page for
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your backend. To find out about the right SCSI device use sane-find-scanner:
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# sane-find-scanner
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found SCSI scanner "SCANNER 2.02" at /dev/scanner
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found SCSI scanner "SCANNER 2.02" at /dev/sg0
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found SCSI scanner "SCANNER 2.02" at /dev/sga
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It may help to set a symbolic link /dev/scanner to the respective device if
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automatic detection does not work.
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If you need more information on the Linux SCSI subsystem, look at
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http://www.torque.net/scsi/linux_scsi_24/index.html. Although this
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documentation is about the 2.4 kernels, large parts are also valid for
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older kernels. One important exception is the section on "Device Names
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in devfs".
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Adaptec 1542 SCSI adapter:
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Using buffer sizes of more than 32768 bytes with the aha1542 driver can
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lead to kernel panic with older kernels. To avoid this, run configure with
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the option --enable-scsibuffersize or set the environment variable
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SANE_SG_BUFFERSIZE to 32768 before running scanimage or another frontend,
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or download and install the SG driver 2.1.37 or newer from
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http://www.torque.net/sg.
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idescsi:
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The Linux kernel "Emulation of a SCSI host adapter for IDE ATAPI
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devices" (idescsi) is reported to cause problems in connection with
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SANE. If your scanner isn't found or you encounter segmentation faults
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try to disable idescsi.
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SCSI Direct IO: Recent versions of the Linux SG driver for the 2.4 kernels
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support direct IO, i.e., the SCSI adapter's DMA chip copies data directly
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to/from user memory. Direct IO reduces memory usage, but it can lead to
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access conflicts, if a backend uses shared memory. SANE does not use
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direct IO by default. If you want to use it, run
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configure --enable-scsi-directio=yes
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Very old Linux distributions are missing the /usr/include/scsi directory. In
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such a case, it is necessary to copy the relevant files from the kernel
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distribution. Normally, the command:
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cp -a /usr/src/linux/include/scsi /usr/include
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should fix this problem. Don't do this if you don't get compilation errors
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about missing SCSI headers.
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Other Information
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=================
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Compilation errors in /usr/include/linux/videodev.h: These errors happen if
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there is a link /usr/include/linux -> /usr/src/linux/include/linux. Most
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distributions come with their own Linux-specific headers so this link is
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ususally not a good idea (and frowned upon by the kernel hackers). As a
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workaround, make sure that the link points to a Linux 2.4 kernel (not 2.6).
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Excessive warnings "pointer of type `void *' used in arithmetic":
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Some older versions of glibc generate these warnings not related to SANE
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source code. To suppress these warnings do
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export CFLAGS="-g -O2 -D__NO_STRING_INLINES"
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and rerun configure.
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Older gcc compilers may abort with error "virtual memory exhausted",
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usually in canon.c. Try to compile with lower optimization levels:
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make CFLAGS="-g -Wall -O1", make CFLAGS="-g -Wall -O", or
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make CFLAGS="-g -Wall".
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If you use DEC cc on Linux Alpha, you may need to set LDFLAGS="-N" to
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be able to build sane-backends.
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The Intel C++ Compiler for IA32 and IA64 isn't supported yet. If you want
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to try nevertheless, you will experience undefined references to inb
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and outb functions. To avoid those replace #include <sys/io.h> with
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#if defined(__ICC) && __ICC >= 700
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# define __GNUC__ 2
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#endif
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#include <sys/io.h>
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#if defined(__ICC) && __ICC >= 700
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# undef __GNUC__
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#elif defined(__ICC) && defined(HAVE_ASM_IO_H)
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# include <asm/io.h>
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#endif
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