Set custom display resolution using xrandr

set-resolution.sh · 2.4 KiB · Bash Raw

#!/bin/bash
#########################################################################
#                                                                       #
# Set display resolution                                                #
#                                                                       #
# Author: Anthony Axenov (Антон Аксенов)                                #
# Version: 1.0                                                          #
# License: WTFPL                                                        #
#                                                                       #
#########################################################################
#                                                                       #
# Using this script you can change your display resolution              #
# to any one you need. Just adjust some vars below and run script       #
# (chmod +x needed).                                                    #
#                                                                       #
#########################################################################

# Set display name to work with. You can get it via 'xrandr --listactivemonitors'
display="HDMI-2"
# Set width of this display in px
width=1600
# Set height of this display in px
height=900

# Sometimes cvt and gtf generates different modelines.
# You can play around and look which of them gives best result:
modeline=$(cvt ${width} ${height} | grep "Modeline")
# modeline=$(gtf ${width} ${height} 60 | grep "Modeline")

# Some important data needed to xrandr:
modename="${width}x${height}_my"
params=$(echo "$modeline" | sed "s|^\s*Modeline\s*\"[0-9x_.]*\"\s*||")

echo "Set resolution ${width}x${height} on display $display:"
echo "$modename $params"

# Simple logic:
# 1. Switch display to safe mode which always exists (I believe) to avoid errors
xrandr --output $display --mode 640x480
# 2. If display aready have our mode -- we must delete it to avoid errors
if $(xrandr | grep -q "$modename"); then
    # 2.1. Detach mode from display
    xrandr --delmode $display $modename
    # 2.2. Remove mode itself
    xrandr --rmmode $modename
fi
# 3. Create new mode with freshly generated parameters
xrandr --newmode $modename $params
# 4. Attach mode to our display
xrandr --addmode $display $modename
# 5. Switch display to this mode immidiately
xrandr --output $display --mode $modename

1	#!/bin/bash
2	#########################################################################
3	# #
4	# Set display resolution #
5	# #
6	# Author: Anthony Axenov (Антон Аксенов) #
7	# Version: 1.0 #
8	# License: WTFPL #
9	# #
10	#########################################################################
11	# #
12	# Using this script you can change your display resolution #
13	# to any one you need. Just adjust some vars below and run script #
14	# (chmod +x needed). #
15	# #
16	#########################################################################
17
18	# Set display name to work with. You can get it via 'xrandr --listactivemonitors'
19	display="HDMI-2"
20	# Set width of this display in px
21	width=1600
22	# Set height of this display in px
23	height=900
24
25	# Sometimes cvt and gtf generates different modelines.
26	# You can play around and look which of them gives best result:
27	modeline=$(cvt ${width} ${height} \| grep "Modeline")
28	# modeline=$(gtf ${width} ${height} 60 \| grep "Modeline")
29
30	# Some important data needed to xrandr:
31	modename="${width}x${height}_my"
32	params=$(echo "$modeline" \| sed "s\|^\sModeline\s\"[0-9x_.]\"\s\|\|")
33
34	echo "Set resolution ${width}x${height} on display $display:"
35	echo "$modename $params"
36
37	# Simple logic:
38	# 1. Switch display to safe mode which always exists (I believe) to avoid errors
39	xrandr --output $display --mode 640x480
40	# 2. If display aready have our mode -- we must delete it to avoid errors
41	if $(xrandr \| grep -q "$modename"); then
42	# 2.1. Detach mode from display
43	xrandr --delmode $display $modename
44	# 2.2. Remove mode itself
45	xrandr --rmmode $modename
46	fi
47	# 3. Create new mode with freshly generated parameters
48	xrandr --newmode $modename $params
49	# 4. Attach mode to our display
50	xrandr --addmode $display $modename
51	# 5. Switch display to this mode immidiately
52	xrandr --output $display --mode $modename