EGLFS on Raspberry pi 4
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Hi.
I have installed archlinux on a raspberry pi.
I followed the "https://doc.qt.io/qt-5/embedded-linux.html" guide to use EGLFS with a dual screen.
One of these screens is touchScreen and I have found that if I press anything on the 7 inch touch screen, it actually executes a command on the main HDMI screen.This is my json configuration.
{
"device":"/dev/dri/cardi",
"hucursor": false,
"buffers": true,
"outputs": [
{
"nane":"HDMI-A-1",
"virtualIndex":0
},
"name": "HDMI-A-2",
"touchDevice":"/deu/input/event6",
"virtualIndex":1
}
]
}To launch the application I run:
export QT_QPA_EGLFS_KMS_CONFIG = "/home/config.json"./myApp --platform eglfs
The output is:
"Cannot fin EGLConfig, returning null config"
The application starts anyway. But with the touch screen not working on the right screen.
-
Hi.
I have installed archlinux on a raspberry pi.
I followed the "https://doc.qt.io/qt-5/embedded-linux.html" guide to use EGLFS with a dual screen.
One of these screens is touchScreen and I have found that if I press anything on the 7 inch touch screen, it actually executes a command on the main HDMI screen.This is my json configuration.
{
"device":"/dev/dri/cardi",
"hucursor": false,
"buffers": true,
"outputs": [
{
"nane":"HDMI-A-1",
"virtualIndex":0
},
"name": "HDMI-A-2",
"touchDevice":"/deu/input/event6",
"virtualIndex":1
}
]
}To launch the application I run:
export QT_QPA_EGLFS_KMS_CONFIG = "/home/config.json"./myApp --platform eglfs
The output is:
"Cannot fin EGLConfig, returning null config"
The application starts anyway. But with the touch screen not working on the right screen.
@LucaOlimpio said in EGLFS on Raspberry pi 4:
"/ home / config.json"
You have blanks in this path string
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@LucaOlimpio said in EGLFS on Raspberry pi 4:
"/ home / config.json"
You have blanks in this path string
@jsulm sorry, just a spelling mistake.
If I get the path wrong, I get another error like "Failed to open "wrong/path/file".
Therefore this is not the case, but thanks for the reply -
I found the mistake.
In json file the names of the outputs were wrong.
The real name is the name found by eglfs/kms.
I found it from debug console of eglfs.
I activate it with 'export QT_LOGGING_RULES="qt.qpa.*=true"
The real name is "HDM1,HDM2".
