Qt uses 'eglfs' to display performance problems

[User.44]

Qt uses 'eglfs' to display. After configuring this 'hwcursor', use Qt to display the card on HDMI. The touch screen will also get stuck. 

When the QT_QPA_GENERIC_PLUGINS environment variable is deleted and the mouse is plugged in, the mouse cannot be displayed on the Qt interface, and the mouse can be used, and the use of 'hdmi' or LCD is very smooth. The terminal keeps printing "Failed to move cursor on screen UNKNOWN1: -14", as shown below.

 

[Olivier GALLIEN]

Hi @文�?� �?​ 

Are you working with latest V2.1 ?

As you may read in Release note we did some improvement :

• QT eglfs sample image was improved to reach better performances
• QT wayland sample image was added: more relevant for the OpenSTLinux distribution
  • see How_to_build_and_use_an_SDK_for_QT

Olivier

[User.44]

I compiled according to St Yocto and used version 3.1.I don't use Wayland, I use EGLFS.But Qt uses EGLFS more slowly than Wayland does, and the mouse moves slowly across the screen.Using Qt version is 5.14.1.