I just built my own computer (first time I have done this) and I am currently connected to my monitor via HDMI using Linux Mint version 18.03. Though, while I know my monitor supports 1920x1080, it is currently set to 1024x768. When I go into my settings, this is the only option available. I don't have a dedicated GPU, only onboard Intel Graphics. I have tried changing it with xrandr and here is the output:
sam@trinity: xrandr
xrandr: failed to get size of gamma for output default
Screen 0: minimum 1024x768+0+0 0mm x 0mm
1024x768 76.00*
sam@trinity: sudo cvt 1920 1080 60
[sudo] password for sam:
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
sam@trinity ~ $ sudo xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
xrandr: Failed to get size of gamma for output default
sam@trinity ~ $ xrandr -q
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 0mm x 0mm
1024x768 76.00*
1920x1080_60.00 (0x279) 173.000MHz -HSync +VSync
h: width 1920 start 2048 end 2248 total 2576 skew 0 clock 67.16KHz
v: height 1080 start 1083 end 1088 total 1120 clock 59.96Hz
sam@trinity ~ $ sudo xrandr --addmode default 1920x1080_60.00
xrandr: Failed to get size of gamma for output default
I am not sure where to go from here. From what I'm seeing, max supported resolution seems to be only 1024x768. Am I reading this correctly? Any suggestions?