Luckfox Forums

maxkr wrote: ↑2024-11-05 18:52 Hi!

I'm use Luckfox Pico Ultra W + LF40-720720-ARK as described in https://wiki.luckfox.com/Luckfox-Pico/L ... GB-Screen/ with Ubuntu 22.04 (pre-build images from Google Drive). Modetest working fine for me.

Trying to start any native or pyside2 (python binding) QT 5 application with environment variables

Code: Select all

QT_QPA_PLATFORM=eglfs
QT_QPA_EGLFS_INTEGRATION=eglfs_kms
QT_QPA_EGLFS_KMS_ATOMIC=1

All works fine when I'm don't touch anything.
But when I touch there is some glitches on the screen and I seen in the console:

Code: Select all

KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory
QEGLPlatformContext: eglSwapBuffers failed: 3003
Could not lock GBM surface front buffer!

But buffer size is quite enough:

Code: Select all

root@luckfox:/# cat /proc/meminfo | grep 'Cma'
CmaTotal:          43008 kB
CmaAllocated:       6772 kB
CmaReleased:       36236 kB
CmaFree:               0 kB

How can I fix it?
Searching for error give only one answer - increase CMA buffer, but look like this is not valid way.

maxkr wrote: ↑2024-11-05 18:52 Hi!

I'm use Luckfox Pico Ultra W + LF40-720720-ARK as described in https://wiki.luckfox.com/Luckfox-Pico/L ... GB-Screen/ with Ubuntu 22.04 (pre-build images from Google Drive). Modetest working fine for me.

Trying to start any native or pyside2 (python binding) QT 5 application with environment variables

Code: Select all

QT_QPA_PLATFORM=eglfs
QT_QPA_EGLFS_INTEGRATION=eglfs_kms
QT_QPA_EGLFS_KMS_ATOMIC=1

All works fine when I'm don't touch anything.
But when I touch there is some glitches on the screen and I seen in the console:

Code: Select all

KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory
QEGLPlatformContext: eglSwapBuffers failed: 3003
Could not lock GBM surface front buffer!

But buffer size is quite enough:

Code: Select all

root@luckfox:/# cat /proc/meminfo | grep 'Cma'
CmaTotal:          43008 kB
CmaAllocated:       6772 kB
CmaReleased:       36236 kB
CmaFree:               0 kB

How can I fix it?
Searching for error give only one answer - increase CMA buffer, but look like this is not valid way.

root@luckfox:~/egl_test# ./egl_test
Failed to move cursor on screen UNKNOWN1: -14
Failed to move cursor on screen UNKNOWN1: -14
Running on a software rasterizer (LLVMpipe), expect limited performance.
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory
[  114.589530] [drm:rockchip_gem_create_object] *ERROR* failed to alKMS: DRM_IOCTL_MODE_CREATE_DUMB flocate 1048576 byte ailed: Cannot alldma bocate memoryuf
fer
QEGLPlatformContext: eglSwapBuffers failed: 3003
Could not lock GBM surface front buffer!

Alenwowo wrote: ↑2024-11-08 1:57 Hello did you install your QT 5 application yourself via apt?

#!/usr/bin/python3
# -'''- coding: utf-8 -'''-

import sys
from PySide2.QtWidgets import QApplication, QPushButton

def say_hello():
        print("Button clicked, Hello!")

app = QApplication(sys.argv)

button = QPushButton("Click me")
button.clicked.connect(say_hello)
button.show()

app.exec_()

export QT_QPA_PLATFORM="eglfs"
export QT_QPA_EGLFS_INTEGRATION="eglfs_kms"
export QT_QPA_EGLFS_FORCEVSYNC="1"
export QT_QPA_EGLFS_KMS_ATOMIC="1"
export QT_QPA_EGLFS_DEBUG="1"

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
Failed to move cursor on screen UNKNOWN1: -14
Failed to move cursor on screen UNKNOWN1: -14
Created context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 0, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 0, samples 0, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 1, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) with config:
        EGL_BUFFER_SIZE: 24
        EGL_ALPHA_SIZE: 0
        EGL_BLUE_SIZE: 8
        EGL_GREEN_SIZE: 8
        EGL_RED_SIZE: 8
        EGL_DEPTH_SIZE: 0
        EGL_STENCIL_SIZE: 0
        EGL_CONFIG_CAVEAT: 12344
        EGL_CONFIG_ID: 31
        EGL_LEVEL: 0
        EGL_MAX_PBUFFER_HEIGHT: 4096
        EGL_MAX_PBUFFER_PIXELS: 0
        EGL_MAX_PBUFFER_WIDTH: 4096
        EGL_NATIVE_RENDERABLE: 1
        EGL_NATIVE_VISUAL_ID: 875713112
        EGL_NATIVE_VISUAL_TYPE: 12344
        EGL_SAMPLES: 0
        EGL_SAMPLE_BUFFERS: 0
        EGL_SURFACE_TYPE: 4
        EGL_TRANSPARENT_TYPE: 12344
        EGL_TRANSPARENT_BLUE_VALUE: 0
        EGL_TRANSPARENT_GREEN_VALUE: 0
        EGL_TRANSPARENT_RED_VALUE: 0
        EGL_BIND_TO_TEXTURE_RGB: 0
        EGL_BIND_TO_TEXTURE_RGBA: 0
        EGL_MIN_SWAP_INTERVAL: 1
        EGL_MAX_SWAP_INTERVAL: 1
Running on a software rasterizer (LLVMpipe), expect limited performance.

Alenwowo wrote: ↑2024-11-08 6:08 I think it might be caused by not loading the Reximicro GPU driver

maxkr wrote: ↑2024-11-09 8:58

Alenwowo wrote: ↑2024-11-08 1:57 Hello did you install your QT 5 application yourself via apt?

I just install python3-pyside2.* packages via apt and try base example:

Code: Select all

#!/usr/bin/python3
# -'''- coding: utf-8 -'''-

import sys
from PySide2.QtWidgets import QApplication, QPushButton

def say_hello():
        print("Button clicked, Hello!")

app = QApplication(sys.argv)

button = QPushButton("Click me")
button.clicked.connect(say_hello)
button.show()

app.exec_()

Also trying another environment variables:

Code: Select all

export QT_QPA_PLATFORM="eglfs"
export QT_QPA_EGLFS_INTEGRATION="eglfs_kms"
export QT_QPA_EGLFS_FORCEVSYNC="1"
export QT_QPA_EGLFS_KMS_ATOMIC="1"
export QT_QPA_EGLFS_DEBUG="1"

After start application was return:

Code: Select all

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
Failed to move cursor on screen UNKNOWN1: -14
Failed to move cursor on screen UNKNOWN1: -14
Created context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 0, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 0, samples 0, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 1, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) with config:
        EGL_BUFFER_SIZE: 24
        EGL_ALPHA_SIZE: 0
        EGL_BLUE_SIZE: 8
        EGL_GREEN_SIZE: 8
        EGL_RED_SIZE: 8
        EGL_DEPTH_SIZE: 0
        EGL_STENCIL_SIZE: 0
        EGL_CONFIG_CAVEAT: 12344
        EGL_CONFIG_ID: 31
        EGL_LEVEL: 0
        EGL_MAX_PBUFFER_HEIGHT: 4096
        EGL_MAX_PBUFFER_PIXELS: 0
        EGL_MAX_PBUFFER_WIDTH: 4096
        EGL_NATIVE_RENDERABLE: 1
        EGL_NATIVE_VISUAL_ID: 875713112
        EGL_NATIVE_VISUAL_TYPE: 12344
        EGL_SAMPLES: 0
        EGL_SAMPLE_BUFFERS: 0
        EGL_SURFACE_TYPE: 4
        EGL_TRANSPARENT_TYPE: 12344
        EGL_TRANSPARENT_BLUE_VALUE: 0
        EGL_TRANSPARENT_GREEN_VALUE: 0
        EGL_TRANSPARENT_RED_VALUE: 0
        EGL_BIND_TO_TEXTURE_RGB: 0
        EGL_BIND_TO_TEXTURE_RGBA: 0
        EGL_MIN_SWAP_INTERVAL: 1
        EGL_MAX_SWAP_INTERVAL: 1
Running on a software rasterizer (LLVMpipe), expect limited performance.

but still with glitches.

Alenwowo wrote: ↑2024-11-08 6:08 I think it might be caused by not loading the Reximicro GPU driver

How it can be loaded?

Probably, I better switch to the buidroot's image and try Qt there.