Installed Linux Mint at home on my desktop. Works great, except I wasn’t happy about the resolution of my only Samsung flatscreen (as 2nd monitor), which was stuck at 1024×768. Finally got around to researching, and I found some tricks that actually work! So here’s the goods.
Linux Mint: 18.04
Monitor: Samsung SyncMaster 931c (2nd monitor as VGA)
Old resolution: 1024×768
Desired resolution: 1280×1024
xrandr shows:
$ xrandr Screen 0: minimum 8 x 8, current 2304 x 1024, maximum 32767 x 32767 DP1 disconnected (normal left inverted right x axis y axis) ... snipped 1st monitor as HDMI VGA1 connected 1024x768+1280+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.00* 800x600 60.32 56.25 848x480 60.00 640x480 59.94 VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Get specs for new resolution:
$ gtf 1280 1024 60 # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Commands to switch resolution (use text after ‘Modeline’ above in –newmode definition):
$ xrandr --newmode "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync $ xrandr --addmode VGA1 "1280x1024_60.00" $ xrandr --output VGA1 --mode "1280x1024_60.00"
Now. Making it stick after reboot! Next challenge.