get-edid(1) General Commands Manual get-edid(1)
NAME
get-edid, parse-edid - read-edid tools to retrieve and interpret monitor
specifications using the VESA VBE DDC protocol
SYNOPSIS
get-edid [OPTIONS] | parse-edid
get-edid [OPTIONS] > filename
parse-edid < filename
DESCRIPTION
The read-edid utility comprises two tools: get-edid and parse-edid.
get-edid uses real mode calls to perform Data Display Channel (DDC)
transfers, or Linux i2c calls to perform Enhanced DDC transfers to re-
trieve information from monitors, including identification strings, sup-
ported sync ranges, available video modes, and video mode parameters.
Such information can be useful for configuring X Window System servers
in certain cases.
get-edid returns the raw Extended Display Identification Data (EDID)
block directly from the monitor, so the parse-edid command is available
to interpret it and generate a human-readable block of text information
that can also be included in a X11 xorg.conf file.
Generally the output of get-edid is piped directly to parse-edid.
New in version 3.0.0, get-edid takes a few options.
-b BUS, --bus BUS
only scan the i2c bus BUS (if built with i2c support)
-c, --classiconly
only use the older VBE interface (if built with i2c and VBE sup-
port)
-h, --help
display a basic help message
-i, --i2conly
only use the newer i2c interface (if built with i2c and VBE sup-
port)
-m NUM, --monitor NUM
try to return information about monitor number NUM (VBE only)
-q, --quiet
do not output messages over stderr
parse-edid still does not take any options. --help will show you which
options your build of read-edid supports.
AUTHOR
read-edid is originally the work of John Fremlin and others. Since
1.4.2, the new maintainer and programmer has been Matthew Kern. Nearly
all of the code for this project, as well as this manual page, has been
rewritten for 3.0.0 by Matthew Kern. See AUTHORS for more details.
SEE ALSO
Matthew Kern's read-edid website at <http://polypux.org/projects/read-
edid>
2013-08-29 get-edid(1)
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