No OpenGL support

Graphics / Linux Linux
1

I have a laptop with hybrid graphics (AMD APU and NVIDIA GeForce RTX 3060) and two external monitors, running Ubuntu 24.04.2 LTS with KDE backports. After fixing a faulty amdgpu installation (I had leftover packages from proprietary AMD drivers, which I removed) I noticed that KDE Plasma no longer displays window shadows. When I press the key combinations to enable/disable compositor I see this in /var/log/syslog:

kwin_core: Compositing disabled: no OpenGL support
kwin_core: Compositing is not possible

I’ve reinstalled nvidia-driver-550 to no avail. Assuming that Compositor doesn’t load because OpenGL support is missing, what should I do to enable it?

2

Turned out to be some Mesa related package (can’t tell for sure which one because I basically reinstalled the entire desktop environment while troubleshooting). Purging and installing it again fixed the problems.

3

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