Интересный вопрос!
https://unix.stackexchange.com/questions/220387/how-to-set-scaling-mode-for-external-displays-on-intel-gpuИ на сегодняшний день это до сих пор не реализовано на уровне Intel KMS видеодрайвера:
(см. отсутствие scaling mode в свойствах монитора VGA1, - поскипан только EDID)
$ xrandr --prop
Screen 0: minimum 8 x 8, current 1024 x 768, maximum 32767 x 32767
LVDS1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 300mm x 230mm
EDID:
<skip>
BACKLIGHT: 2139560
range: (0, 2749155)
Backlight: 2139560
range: (0, 2749155)
scaling mode: Full aspect
supported: None, Full, Center, Full aspect
1024x768 60.00*+
800x600 60.32 56.25
640x480 59.94
512x384 60.00
TV1 unknown connection (normal left inverted right x axis y axis)
bottom margin: 37
range: (0, 100)
right margin: 46
range: (0, 100)
top margin: 36
range: (0, 100)
left margin: 54
range: (0, 100)
mode: NTSC-M
supported: NTSC-M, NTSC-443, NTSC-J, PAL-M, PAL-N, PAL, 480p, 576p, 720p@60Hz, 720p@50Hz, 1080i@50Hz, 1080i@60Hz
848x480 59.94 +
640x480 59.94 +
1024x768 59.94
800x600 59.94
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 430mm x 270mm
EDID:
<skip>
1680x1050 59.88 + 59.95
1280x1024 75.02 60.02
1440x900 74.98 59.89
1280x960 60.00
1152x864 75.00
1024x768 75.08 60.00*
832x624 74.55
800x600 75.00 60.32 56.25
640x480 75.00 60.00
720x400 70.08
VIRTUAL1 disconnected (normal left inverted right x axis y axis)