Last update: Tue Oct 14 20:38:59 1997
- Avoiding damage on Mustek flatbed scanners
The Mustek flatbed scanners have no protection against exceeding
the physical scan area height. That is, if a scan is attempted with
a height that exceeds the height of the scan surface, the scanner
begins making loud noises and the scan mechanism may be damaged.
Thus, if you hear such a noise, IMMEDIATELY turn off the scanner.
Normally, the Mustek backend will ensure that the maximum scan
height is not exceeded. However, if your scanner model has not been
tested yet, this saftey-guard may not work. In such a case,
you may want to use scanimage's -y option to gradually determine the
exact height of the scan area (making sure to turn off the scanner as
soon as it starts making noises). Once you know the proper height,
mail the following information to firstname.lastname@example.org:
- scanner name (label on the front of the scanner)
- scanner model (SCSI ID)
- firmware revision
The last two items can be determined with a command of the form:
SANE_DEBUG_MUSTEK=3 scanimage -h -d mustek >/dev/null
The current list of Mustek scanners that are known to work
properly can be found in man-page sane-mustek(5).
- My Linux box used to scan just fine but now it suddenly won't work anymore,
If you increased SG_BIG_BUFF when building SANE (as is recommended
by sane-scsi(5) for performance reasons), be careful when upgrading
the kernel as that will typically install a new version of
/usr/include/scsi/sg.h, with the old, smaller value. This has
the effect that SANE _thinks_ the SCSI buffer is big, but since
the Linux kernel uses a smaller value, scanning will fail with
"out of memory" errors. To fix this problem, increase SG_BIG_BUFF
to the old value, rebuild the kernel, then reboot the machine
- xscanimage/xcam crashes X server on Linux/Alpha
Older versions of the TGA X server (such as version 3.1.2) are known
to fail when creating shared images of certain sizes. This can be
avoided by invoking xscan and xcam with option --no-shm.
- Missing /usr/include/scsi on Linux systems
Older Linux distributions are missing the /usr/include/scsi directory.
In such a case, it is necessary to copy the relevant files from
the kernel distribution. Normally, the command:
cp -a /usr/src/linux/include/scsi /usr/include
should fix this problem.