So with `ibt=off` set permanently in the kernel from the grub config, I was able to install the nvidia driver & CUDA! I had to go into tty several times to reconfigure and reinstall gdm3 but I managed to get through it. Not sure whether this is a long-term solution but that might help a few others. If someone has any idea how to get back lightdm though, I'm all ears
Hello there!   I bought a Dell G15 5521 SE a month ago, and installed Ubuntu 20.04 (not un dual boot) on it. To give you the full picture: So my setup currently is: I tried to follow a few recommendations online to install other firmware versions (1.187) but consequently, it circled back to earlier problems I had and now I don't have wifi anymore.   Either my goal here is: - fix this annoying wifi issue (audio seems to have a problem as well) - being able to use lightdm - being able to install NVIDIA drivers and CUDA   I have to admit that usually, even when it’s hard and it takes a few weeks to identify where the problem comes from, I manage to finish the setup. But here, I’m running a bit out of ideas, and I bought the laptop mostly for the GPU & CPU while I cannot access the GPU here. Any help would be greatly appreciated!   Cheers!
Dell G15 5521 SE - Ubuntu compatibility