Internal viewer choppy under Linux when an external monitor is connected

[v-marinkov]

Environment

• TeXstudio: 4.8.6
• Qt: 6.8.2
• OS: Fedora 41 GNOME
• TeX distribution: Miktex 24.12
• Hardware: Lenovo Yoga Slim 7 Pro, AMD Ryzen 5800H

Expected behavior

Internal viewer is smooth and responsive when using only the laptop screen

Actual behavior

The internal viewer is incredibly choppy and unresponsive when and external monitor is connected. It doesn't matter whether the viewer is embedded or windowed, nor what settings are chosen (direct, buffered, hybrid; arthur, splash). It also doesn't matter where the window is position - on the native or the external screen.

[sunderme]

can't test, windows is okay. And so is linux with one monitor.