hi
or increase the framerate as my monitor supports 75Hz
Xorg 3d has a command xrandr so run it
xrandr
Look at your results. I will use mine as an example
1920x1080 60.00*+ 74.97 59.96 50.00 59.94 59.93
# and lets pretend I wanted to use
1024x768 75.05 60.04 75.03 70.07 60.00
use Apps to download arandr and run it. (there are some errors in my info file for arandr I will fix later)
arandr &
GUI appears and I am on hdmi output. I pull down Outputs -> hdmi* -> Resolution -> click the radio button against 1024x768
click apply...screen will blank....and reset to new resolution, for this session only at this stage
Leave arandr open
repeat xrandr command to check you are happy with new results
If happy, save the setting for later sessions. In arandr GUI click the download icon (below outputs).
Choose a file name eg 1024.sh and press enter or click the save button
(if you are going from large to smaller, you may not see the save button)
For next login or next startx we automate it by
echo '$HOME/.screenlayout/1024.sh &' > $HOME/.X.d/monitor
Note there are periods in this command for hidden directories.
To test it now, run exittc and exit to prompt and then run startx
If unhappy with results....delete $HOME/.X.d/monitor
exit to prompt and startx to get back to your original settings
Good luck