How to Change the Primary Screen Resolution, mine is too low ?

[JOduMonT]

Hi;
I have several Applications with a Icons/Fonts size issues which seams to all have in common Qt.
I'm talking about application I use on a XFCE Ubuntu 18.04: Gnome, VLC, QOwnNotes, OnlyOffice Desktop.

Here a dump from an apps

**Platform**: `linux`
**Operating System**: `Ubuntu 18.04.4 LTS`
**Build architecture**: `x86_64`
**Current architecture**: `x86_64`
**Release**: `Launchpad PPA`
**Qt Version (build)**: `5.9.5`
**Qt Version (runtime)**: `5.9.5`
...
**Qt Debug**: `0`
**Locale (system)**: `en_US`
**Locale (interface)**: *empty*
**Primary screen resolution**: `640x360`
**Icon theme**: `breeze-dark-qownnotes`
...

The issue one developer point it out and it sound also odd for me is the : **Primary screen resolution: `640x360``**

Now after a quick look on the web, I didn't found how to change this resolution,

[Kent-Dorfman]

not Qt related, but web search "ubuntu desktoip - change screen resolution"

[JOduMonT]

@Kent-Dorfman said in How to Change the Primary Screen Resolution, mine is too low ?:

not Qt related, but web search "ubuntu desktoip - change screen resolution"

Nice try,

I hope I didn't sign to another forum where people use it as a chat room

since an image worth a thousand word

and few ref:

I'm using Ubuntu 18.04LTS with XFCE 4.12 everything was fine until last week, I think it's an update and/or I uninstalled another apps which probably had dependencies, ... but I can't figure when and why it is like that right now.

The apps are affected VLC, GIMP (with a solution) and qOwnNotes. It don't seams related directly to XFCE because when I play with font and size through Appearance and Windows Manager these apps don't respect the change.

While I was posting the issue on qOwnNotes GitHub crazy thing happened.

Basically if I unplug my HDMI screen everything is fine on my laptop screen which the resolution is: 1920x1080
http://i.imgur.com/T3deziL.png

Then if I plug back my HDMI and use is as a mirror everything still fine but the Mirror setting is not fully applied
http://i.imgur.com/0gqe6NK.png

But if I try Dual Screen it is not fine
http://i.imgur.com/zHJDeyu.png

It is also weird if I Enforce the Mirror setting http://i.imgur.com/hsKr0Gb.png
and my Laptop screen resolution fallback to 1280x1024 instead of 1920x1080

• https://forum.xfce.org/viewtopic.php?id=13779
• https://github.com/pbek/QOwnNotes/issues/1639

[fcarney]

I think in QML you can fix it like this:

import QtQuick.Monitor 2.12

Monitor {
    width: 1920
    height: 1080
}

[JOduMonT]

@fcarney said in How to Change the Primary Screen Resolution, mine is too low ?:

I think in QML you can fix it like this:
import QtQuick.Monitor 2.12

Monitor {
width: 1920
height: 1080
}

it might be a great lead but where exactly I'm suppose to add this ?
because for me this page just sound like sj!hrê,,wkîsh (https://doc.qt.io/qt-5/qml-qtquick-window-screen.html)