Current output from kscreen-console
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START: Requesting Config
Received config. Took 12 milliseconds
Screen:
maxSize: QSize(32767, 32767)
minSize: QSize(8, 8)
currentSize: QSize(1920, 1080)
-----------------------------------------------------
Id: 67
Name: "eDP1"
Type: "Panel (Laptop)"
Connected: true
Enabled: true
Primary: true
Rotation: 1
Pos: QPoint(0,0)
MMSize: QSize(340, 190)
FollowPreferredMode: false
Size: QSize(1920, 1080)
Scale: 1
Clones: None
Mode: "73"
Preferred Mode: "73"
Preferred modes: ("73")
Modes:
"292" "" QSize(1920, 1080) 59.9339
"293" "" QSize(1680, 1050) 59.8833
"294" "" QSize(1400, 1050) 59.9756
"295" "" QSize(1600, 900) 59.9996
"296" "" QSize(1600, 900) 59.946
"297" "" QSize(1600, 900) 59.8248
"298" "" QSize(1280, 1024) 76.2498
"299" "" QSize(1280, 1024) 75.0186
"300" "" QSize(1280, 1024) 60.0197
"301" "" QSize(1400, 900) 59.9641
"302" "" QSize(1400, 900) 59.8798
"303" "" QSize(1280, 960) 60
"304" "" QSize(1368, 768) 60
"305" "" QSize(1368, 768) 59.882
"306" "" QSize(1368, 768) 59.8532
"307" "" QSize(1280, 800) 59.8103
"308" "" QSize(1280, 800) 59.9095
"309" "" QSize(1280, 768) 120.002
"310" "" QSize(1280, 768) 99.9989
"311" "" QSize(1280, 768) 84.9985
"312" "" QSize(1280, 768) 75.0023
"313" "" QSize(1280, 768) 60.003
"314" "" QSize(1280, 768) 50.0012
"315" "" QSize(1280, 720) 59.8551
"316" "" QSize(1280, 720) 59.9995
"317" "" QSize(1280, 720) 59.7447
"318" "" QSize(1152, 768) 68.3516
"319" "" QSize(1024, 768) 98.1558
"320" "" QSize(1024, 768) 74.8142
"321" "" QSize(1024, 768) 60.0038
"322" "" QSize(1024, 768) 60.0038
"323" "" QSize(1024, 576) 59.9989
"324" "" QSize(1024, 576) 59.8992
"325" "" QSize(1024, 576) 59.8195
"326" "" QSize(832, 624) 74.1817
"327" "" QSize(960, 540) 59.9991
"328" "" QSize(960, 540) 59.629
"329" "" QSize(960, 540) 59.8182
"330" "" QSize(800, 600) 186.012
"331" "" QSize(800, 600) 94.8713
"332" "" QSize(800, 600) 60.3165
"333" "" QSize(800, 600) 56.25
"334" "" QSize(768, 576) 99.9867
"335" "" QSize(768, 576) 79.3651
"336" "" QSize(864, 486) 59.9998
"337" "" QSize(864, 486) 59.9153
"338" "" QSize(864, 486) 59.5703
"339" "" QSize(800, 480) 120.001
"340" "" QSize(800, 480) 99.9993
"341" "" QSize(800, 480) 84.9962
"342" "" QSize(800, 480) 74.993
"343" "" QSize(800, 480) 59.9971
"344" "" QSize(800, 480) 50.0083
"345" "" QSize(640, 480) 116.652
"346" "" QSize(640, 480) 59.9405
"347" "" QSize(720, 405) 59.5062
"348" "" QSize(720, 405) 60
"349" "" QSize(720, 405) 58.9879
"350" "" QSize(640, 360) 59.8404
"351" "" QSize(640, 360) 59.3249
"352" "" QSize(640, 360) 59.9971
"73" "" QSize(1920, 1080) 60.0962
EDID Info:
Device ID: "xrandr-unknown"
Name: ""
Vendor: ""
Serial: ""
EISA ID: "156HL01-102"
Hash: "ee939423154f0da39a41c727e7ca7448"
Width: 34
Height: 19
Gamma: 2.2
Red: QQuaternion(scalar:1, vector:(0.620117, 0.355469, 0))
Green: QQuaternion(scalar:1, vector:(0.299805, 0.580078, 0))
Blue: QQuaternion(scalar:1, vector:(0.150391, 0.0898438, 0))
White: QQuaternion(scalar:1, vector:(0.313477, 0.329102, 0))
-----------------------------------------------------
Id: 68
Name: "DP1"
Type: "DisplayPort"
Connected: false
-----------------------------------------------------
Id: 69
Name: "HDMI1"
Type: "HDMI"
Connected: false
-----------------------------------------------------
Id: 70
Name: "HDMI2"
Type: "HDMI"
Connected: false
-----------------------------------------------------
Id: 71
Name: "VIRTUAL1"
Type: "Unknown"
Connected: false
And current output from xrandr
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Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 340mm x 190mm
1920x1080 60.10*+ 59.93
1680x1050 59.88
1400x1050 59.98
1600x900 60.00 59.95 59.82
1280x1024 76.25 75.02 60.02
1400x900 59.96 59.88
1280x960 60.00
1368x768 60.00 59.88 59.85
1280x800 59.81 59.91
1280x768_120 120.00
1280x768_100 100.00
1280x768_85 85.00
1280x768_75 75.00
1280x768_60 60.00
1280x768_50 50.00
1280x720 59.86 60.00 59.74
1152x768 68.35
1024x768 98.16 74.81 60.00 60.00
1024x576 60.00 59.90 59.82
832x624 74.18
960x540 60.00 59.63 59.82
800x600 186.01 94.87 60.32 56.25
768x576 99.99 79.37
864x486 60.00 59.92 59.57
800x480_120 120.00
800x480_100 100.00
800x480_85 85.00
800x480_75 74.99
800x480_60 60.00
800x480_50 50.01
640x480 116.65 59.94
720x405 59.51 60.00 58.99
640x360 59.84 59.32 60.00
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Screen resolution set to default "Automatic" and moniter set to "Plug&Play" in MCC.
I want to lower default maximum resolution from 1920 x 1080 (maximum monitor resolution) to 1280x768.
UPDATE - 1
Command
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xrandr -s 1280x768_60
change the current session resolution, without black screen effect. But how make it permanent?
Update -2
I place this command in $HOME/.bashrc and it work. But from my point of view, such possibility should be available from "System settings", as in M^. And /etc/X11/xorg.conf file does not contain any definition for Nvidia. So - so far "DONE".