Scaling problems with QT apps of ROS Melodic

asked 2020-10-13 08:01:38 -0500

ArtemTakahagi gravatar image

I'm having graphical issues with some parts of ROS QT apps (like RViz, Gazebo). Problems are:

  • some number and text boxes do not fit their numbers
  • scrollbars are tiny
  • random visual artifacts

For example, here is the "pose creation" window of Moveit : pose creation

Tried changing QT env vars as per
export QT_SCALE_FACTOR='0.5, 0.8, 1.5, 2'
The second env var changes rendering but completely hides some parts of GUI.
I experience this issue only with ROS apps. VLC and other QT5 apps are fine.
I'm on a 14" FHD screen. Using Xubuntu 18.04 + i3.

Here is some additional info:

$ xrdb -query | grep -i dpi
Xft.dpi:    157

$ env | grep QT_

$ xdpyinfo | grep dots
resolution:    96x96 dots per inch

Unsetting QT_QPA_PLATFORMTHEME fixes the Path Constraints section alignment, but the moveit issue persists. I'm also using a size 10 font (set via QT5 Settings)

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