Ubuntu 24.04 Random Freezes / Black Screen

**[Help] Ubuntu 24.04 Random Freezes / Black Screen (ASUS N552VX - Dual Boot)** Hey folks, I'm struggling with an issue on my laptop and hoping someone can help. **Specs:** - Laptop: ASUS N552VX - CPU: Intel i7-6700HQ - GPU: Intel HD + NVIDIA GTX 950M (Optimus) - OS: Ubuntu 24.04 LTS (X11) — dual boot with Windows 10 **Problem:** Randomly during usage, Ubuntu either freezes completely or the screen goes black. When this happens: - Keyboard/mouse stops responding - No TTY (Ctrl+Alt+F3 doesn’t work) - I can only do a hard shutdown (holding the power button) **Things I've tried:** - Full system update (sudo apt update && sudo apt upgrade) - Switched to Intel GPU via sudo prime-select intel - Disabled PCIe AER errors by adding pci=noaer to GRUB - Using X11 instead of Wayland - Kernel: 6.8 (also tried 6.11 mainline) Still getting the same issue, often after some browsing or video playback. No issues under Windows. Any logs or configs I should check? Has anyone with a similar hybrid GPU setup faced this? Thanks!