The problem is pretty much in the title, windows work perfectly, I deactivated the fast start beacuse I read can cause problems. I have windows in a ssd, ubuntu in a usb and shared hdd with windows. There is somenthing I could do to prevent crash and push to login screen? It happens the two things togheter, but one at time too so I think this are two different issues. Thank you for help
sudo ubuntu-drivers autoinstall
If wrong driver installed, you must purge first or conflicts will cause problems. Or Drivers tab in Software. askubuntu.com/questions/1478024/…