ERROR: Unable to read text from image, did not copy

[matclab]

On recent Arch linux with i3wm window manager I often get ERROR: Unable to read text from image, did not copy.

I have :

• python-pyqt5 : 5.15.8
• python-pyqt5-sip: 12.11.1
• python-pillow: 9.4.0
• python-pytesseract: 0.3.10

[matclab]

Trying in venv with exact dependencies from requirements.txt doesn't solve the problem.

Modifying getWindow to save image show that the grabWindow function return an all black image.

    def getWindow(self):
        res = self._screen.grabWindow(0)
        res.save("/tmp/a.png", "PNG")
        return res

[matclab]

Note that it sometimes work, but I didn't find a common scenario. I'll try to investigate more.

I tried with and without compositor (picom) but it doesn't improve the situation.