Lack of resolution available (solved)

[GELvdH]

My display is a Vizio 22" which I use both as TV and computer monitor. I am running dual boot Win 10 Pro / linuxmint 19.1. In linux I show only 3 resolutions available, 1920x1080 (16x9), 1020x768 (4x3) and 800x600 (4x3). In windows mode I show several other resolutions including 1360x768 (16x9), I would like this resolution but it is not available in linux. Anyway I can add this resolution to my linuxmint boot system?

[AndyMH]

In a terminal type

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xrandr

look at the output, we want to know the name of the port the monitor is connected to, this is part of the output from mine:

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VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected primary 2560x1080+0+0 (normal left inverted right x axis y axis) 673mm x 284mm

My monitor is connected on HDMI-2.
Next enter:

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cvt  1360 768

The output will look something like:

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# 1360x768 59.80 Hz (CVT) hsync: 47.72 kHz; pclk: 84.75 MHz
Modeline "1360x768_60.00"   84.75  1360 1432 1568 1776  768 771 781 798 -hsync +vsync

We want to know the modeline. Now in a terminal (copy/paste the parameters in the modeline from the cvt output), replace HDMI-2 with the port you got from running xrandr above:

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xrandr --newmode "1360x768"   84.75  1360 1432 1568 1776  768 771 781 798 -hsync +vsync
xrandr --addmode HDMI-2 "1360x768"

Now go and check and see if that monitor resolution is available and works. In cinnamon menu > preferences > display.

If it works, post back and I'll tell you how to make it permanent.

[GELvdH]

Outstanding, it works. Thank you, now you said something about making it permanent?

[AndyMH]

In /home/you you should find a file called .profile. This is what the content of mine looks like:

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# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask
# for ssh logins, install and configure the libpam-umask package.
#umask 022
# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
	. "$HOME/.bashrc"
    fi
fi
# set PATH so it includes user's private bin directories
PATH="$HOME/bin:$HOME/.local/bin:$PATH"

Simply add the two lines for xrandr --newmode and xrandr --addmode that worked to the end of the file. It gets executed every time you start up. Note - if you have more resolutions that you want to add, simply repeat what you have done to get the modelines for the other resolutions and also add them as well.

[GELvdH]

I understand the xrandr lines but I can't find the ".profile". I typed cd /home/gunter but it does not change anything.

[GELvdH]

Sorry to be such a pain but I am 79 and tried to read something on linux the problem is I can't remember things as I used to (I am thinking of putting up Post-It notes in the bathroom so I don't forget to flush).

[md419]

In your file manager, make sure "Show Hidden Files" is checked ... .profile is a hidden file.

[GELvdH]

Thank, everything is working properly now, at least the display is. Hope I can get the networking problem resolved.

Thanks again,
Gunter

[AndyMH]

Sorry to be such a pain but I am 79

Don't worry, I'm 65 and trying to catch up