情况：我正在使用多个监视器，我想在 bash 中获取它们的名称。目前我正在使用 Ubuntu 10.04。
我知道xrandr。从中我只能得到统计数据。我想要的是读取数组中的所有监视器名称以使用它们。
有没有一种明确的方法可以做到这一点，而无需从某种字符串中删除名称？一个明确的方法是从文件中读取它们。一种不清楚的方法是将 xrandr 输出通过管道传输到某种函数以从中删除名称。
问问题
63999 次
7 回答
27
受 Beni 回答的启发，这将使用EDID数据读取xrandr并根据EDID 规范提取监视器名称，无需任何外部工具，例如parse-edid：
#!/bin/bash
while read -r output hex conn; do
[[ -z "$conn" ]] && conn=${output%%-*}
echo "# $output $conn $(xxd -r -p <<< "$hex")"
done < <(xrandr --prop | awk '
!/^[ \t]/ {
if (output && hex) print output, hex, conn
output=$1
hex=""
}
/ConnectorType:/ {conn=$2}
/[:.]/ && h {
sub(/.*000000fc00/, "", hex)
hex = substr(hex, 0, 26) "0a"
sub(/0a.*/, "", hex)
h=0
}
h {sub(/[ \t]+/, ""); hex = hex $0}
/EDID.*:/ {h=1}
END {if (output && hex) print output, hex, conn}
' | sort
)
仅用于awk精确提取监视器名称，而不会从 EDID 中提取额外的垃圾，因此是“幻数”，例如,和. 最后用于从十六进制转换为 ASCII，每行打印一个监视器名称。000000fc00260axxd
基于这个解决方案，我制作了一个方便的脚本来切换监视器，它也可以用来简单地列出监视器信息：
$ monitor-switch --list
Connected monitors:
# DFP5 HDMI HT-R391
# DFP7 DVI-I DELL U2412M
$ monitor-switch --list
Connected monitors:
# DisplayPort-1 DisplayPort DELL U2412M
# DisplayPort-3 DisplayPort DELL U2415
# HDMI-A-2 HDMI LG TV
于 2014-07-24T12:11:56.837 回答
18
在 Ubuntu 16.04、18.04 上测试。（我知道现在回答为时已晚，但这个解决方案今天很重要）
$ sudo apt-get install -y hwinfo
...
$ hwinfo --monitor --short
monitor:
SONY TV
AUO LCD Monitor
我连接了两台显示器。一个是笔记本电脑，另一个是外接显示器。只要插入或拔出外接显示器，此命令就会反映更改。您需要不断地进行轮询。删除该--short选项可提供更详细的信息。
您可以使用以下后台作业轮询状态：
$ while true;
> do
> hwinfo --monitor --short;
> sleep 2;
> done >> monitor.log &
while true循环无限次运行。将sleep 2循环的每次迭代暂停 2 秒。的输出hwinfo --monitor --short附加到monitor.log. 该日志文件可以为您提供监控插件和插件的活动历史记录。
仅供参考：我正在使用使用上述命令（和其他类似命令）的后台（守护程序）python 脚本来检测是否有人在计算机实验室的系统中执行一些硬件插件和插件。如果是这样，我几乎实时地收到有人插入/插入显示器、鼠标或键盘的适当通知！
于 2017-05-11T16:17:51.227 回答
10
sudo get-edid didn't work for me. (EDIT: now works on another computer, Lubuntu 14.10; I'd blame BIOS differences but that's a random guess...)
Anyway under X, xrandr --verbose prints the EDID block. Here is a quick and dirty way to extract it and pass to parse-edid:
#!/bin/bash
xrandr --verbose | perl -ne '
if ((/EDID(_DATA)?:/.../:/) && !/:/) {
s/^\s+//;
chomp;
$hex .= $_;
} elsif ($hex) {
# Use "|strings" if you dont have read-edid package installed
# and just want to see (or grep) the human-readable parts.
open FH, "|parse-edid";
print FH pack("H*", $hex);
$hex = "";
}'
于 2013-08-15T02:39:12.200 回答
2
我知道这是一种肮脏的方式，但它给了我一些显示器型号名称，甚至比sudo get-edid|parse-edid. 它读取数组中的信息，并以一种可以像读取文件一样读取的方式输出它。您可以根据需要对其进行修改。
#!/bin/bash
#
#
# get-monitors.sh
#
# Get monitor name and some other properties of connected monitors
# by investigating the output of xrandr command and EDID data
# provided by it.
#
# Copyright (C) 2015,2016 Jarno Suni <8@iki.fi>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. See <http://www.gnu.org/licenses/gpl.html>
set -o nounset
set -o errexit
# EDID format:
# http://en.wikipedia.org/wiki/Extended_Display_Identification_Data#EDID_1.3_data_format
# http://read.pudn.com/downloads110/ebook/456020/E-EDID%20Standard.pdf
declare -r us=';' # separator string;
# If EDID has more than one field with same tag, concatenate them,
# but add this string in between.
declare -r fs=$'\x1f' # Field separator for internal use;
# must be a character that does not occur in data fields.
declare -r invalid_edid_tag='--bad EDID--'
# If base EDID is invalid, don't try to extract information from it,
# but assign this string to the fields.
# Get information in these arrays:
declare -a outs # Output names
declare -a conns # Connection type names (if available)
declare -a names # Monitor names (but empty for some laptop displays)
declare -a datas # Extra data; may include laptop display brand name
# and model name
declare -i no # number of connected outputs (to be counted)
# xrandr command to use as a source of information:
declare -r xrandr_output_cmd="xrandr --prop"
hex_to_ascii() {
echo -n "$1" | xxd -r -p
}
ascii_to_hex() {
echo -n "$1" | xxd -p
}
get_info() {
no=0
declare OIFS=$IFS;
IFS=$fs
while read -r output conn hexn hexd; do
outs[no]="${output}"
conns[no]="${conn}"
names[no]="$(hex_to_ascii "$hexn")"
datas[no]="$(hex_to_ascii "$hexd")"
(( ++no ))
done < <(eval $xrandr_output_cmd | gawk -v gfs="$fs" '
function print_fields() {
print output, conn, hexn, hexd
conn=""; hexn=""; hexd=""
}
function append_hex_field(src_hex,position,app_hex, n) {
n=substr(src_hex,position+10,26)
sub(/0a.*/, "", n)
# EDID specification says field ends by 0x0a
# (\n), if it is shorter than 13 bytes.
#sub(/(20)+$/, "", n)
# strip whitespace at the end of ascii string
if (n && app_hex) return app_hex sp n
else return app_hex n
}
function get_hex_edid( hex) {
getline
while (/^[ \t]*[[:xdigit:]]+$/) {
sub(/[ \t]*/, "")
hex = hex $0
getline
}
return hex
}
function valid_edid(hex, a, sum) {
if (length(hex)<256) return 0
for ( a=1; a<=256; a+=2 ) {
# this requires gawk
sum+=strtonum("0x" substr(hex,a,2))
# this requires --non-decimal-data for gawk:
#sum+=sprintf("%d", "0x" substr(hex,a,2))
}
if (sum % 256) return 0
return 1
}
BEGIN {
OFS=gfs
}
/[^[:blank:]]+ connected/ {
if (unprinted) print_fields()
unprinted=1
output=$1
}
/[^[:blank:]]+ disconnected/ {
if (unprinted) print_fields()
unprinted=0
}
/^[[:blank:]]*EDID.*:/ {
hex=get_hex_edid()
if (valid_edid(hex)) {
for ( c=109; c<=217; c+=36 ) {
switch (substr(hex,c,10)) {
case "000000fc00" :
hexn=append_hex_field(hex,c,hexn)
break
case "000000fe00" :
hexd=append_hex_field(hex,c,hexd)
break
}
}
} else {
# set special value to denote invalid EDID
hexn=iet; hexd=iet
}
}
/ConnectorType:/ {
conn=$2
}
END {
if (unprinted) print_fields()
}' sp=$(ascii_to_hex $us) iet=$(ascii_to_hex $invalid_edid_tag))
IFS="$OIFS"
}
get_info
# print the colums of each display quoted in one row
for (( i=0; i<$no; i++ )); do
echo "'${outs[i]}' '${conns[i]}' '${names[i]}' '${datas[i]}'"
done
于 2015-04-06T23:20:07.380 回答
1
您可以尝试ddcprobe和/或get-edid
$ sudo apt-get install xresprobe read-edid
$ sudo ddcprobe
$ sudo get-edid
于 2012-05-08T18:15:48.490 回答
0
您正在寻找EDID信息，该信息通过 I²C 总线传递并由您的视频驱动程序解释。正如 dtmilano 所说，从 ddcprobe 获取编辑应该可以工作。
您还可以通过记录您的 X start 来获取此信息：
startx -- -logverbose 6
多年前，我使用了一个名为read-edid的包来收集这些信息。
根据 2009 年的这篇博客文章，read-edid 软件包可能已经在 Ubuntu 中可用。
于 2012-05-09T12:37:26.730 回答