Corrupted Window Contents

[natankeddem]

Specification

• pywebview version: pywebview==5.0.5
• operating system: Raspberry Pi 5 running RASPIOS bookworm 64bit with Python 3.11.2
• web renderer: PyQt5==5.15.9 PyQt5-sip==12.11.1 PyQtWebEngine==5.15.6

Description

I am getting a corrupted window display when running the simple-browser.py example.

Practicalities

• YES I am willing to work on this issue myself.

• NO I am prepared to support this issue financially.

[r0x0r]

Sounds like RPI specific problem. Did this occur with previous versions of pywebview?

[natankeddem]

I am not sure, I have never tried to use pywebview before. The same thing seems to happen when using GTK (PyGObject) instead of QT5. Also, I found if you resize the window it seems to fix the issue. Video for reference: google_screen_recording_2024-03-08T14-01_35.900Z.webm

Here is a pip freeze of my current environment using GTK in case that might be useful:

addict==2.4.0
aiofiles==23.2.1
annotated-types==0.6.0
anyio==4.3.0
astunparse==1.6.3
bidict==0.23.1
bottle==0.12.25
certifi==2024.2.2
cffi==1.16.0
charset-normalizer==3.3.2
click==8.1.7
colorzero==2.0
contourpy==1.2.0
cycler==0.12.1
EasyMCP2221==1.6.2
fastapi==0.109.2
fonttools==4.49.0
gpiozero==1.6.2
h11==0.14.0
hidapi==0.14.0
httpcore==1.0.4
httptools==0.6.1
httpx==0.27.0
idna==3.6
ifaddr==0.2.0
itsdangerous==2.1.2
Jinja2==3.1.3
kiwisolver==1.4.5
markdown2==2.4.10
MarkupSafe==2.1.5
matplotlib==3.8.2
nested-lookup==0.2.25
nicegui==1.4.11
numpy==1.26.4
orjson==3.9.15
packaging==23.2
pillow==10.2.0
proxy-tools==0.1.0
pscript==0.7.7
pycairo==1.26.0
pycparser==2.21
pydantic==2.6.3
pydantic_core==2.16.3
pyftdi==0.52.9
Pygments==2.17.2
PyGObject==3.46.0
pyodbc==5.1.0
pyparsing==3.1.2
Pypubsub==4.0.3
pyserial==3.5
python-dateutil==2.9.0.post0
python-dotenv==1.0.1
python-engineio==4.9.0
python-multipart==0.0.6
python-socketio==5.11.1
pyusb==1.2.1
PyVISA==1.11.3
pywebview==5.0.5
PyYAML==6.0.1
requests==2.31.0
scipy==1.11.4
simple-websocket==1.0.0
six==1.16.0
smbus2==0.4.1
sniffio==1.3.1
sounddevice==0.4.1
starlette==0.36.3
tqdm==4.66.1
typing_extensions==4.10.0
urllib3==2.2.1
uvicorn==0.27.1
uvloop==0.19.0
vbuild==0.8.2
watchfiles==0.21.0
websockets==12.0
wsproto==1.2.0

[r0x0r]

It used to be for many years that you could not install needed dependencies for running pywebview on RPI. So the good news that it is possible nowadays.

As for the actual problem, it seems that the problem is somewhere down the stream as you get it both with GTK and QT. Googling got QT "raspberry pi qt graphic problems" or something like that may be a good starting point. I do not have a spare Raspberry Pi, so I cannot reproduce it.

PS: There is a fix for a QT blank screen problem by setting QTWEBENGINE_CHROMIUM_FLAGS="--no-sandbox --no-sandbox" environment variable. I don't think it is applicable, but maybe worth a try.

[r0x0r]

Seems like the same problem with VSCode on RPI https://www.reddit.com/r/raspberry_pi/comments/199yhpy/application_gui_corrupted/

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