Hi, I've been using SL for a couple of months. I'm setting up a PC to run Gromacs 5.1.4. It was running rime with CPU. Then i've installed a NVidia 2070M and start trying to compile. It happens to have several dependencies and I was installing one after another. 

The last packages I've install before the boot problem were EPEL and DKMS. After have these packs installed I've rebooted the machine once to have the drivers loaded (unfortunately I don't know how to do it on the fly). Then the I've couldn't make it boot again. I've tried safety mode boot also. I've removed the NVidia card but it keeps freezing.

What else could I do?

Thanks in advance, Rafael