With the first-party NVidia drivers? I've never had that happen or even heard of it happening before now. Admittedly I don't use Ubuntu much, and they sound like the kind of distro that would silently auto-update your kernel or something, which would produce that kind of failure mode? (Which is at least a clean immediate failure on reboot that you can fix immediately, rather than something that crashes in the middle of your session destroying your work - as bad as it is, that still sounds a lot better than my AMD card experience).
Whereas I've used linux on several systems with AMD/ATi cards and they've always been flaky.
It only happens on a reboot, not while I'm using it, and only maybe once a month, but it's still annoying because I have to ssh in to reinstall the drivers every time.
And here I was all hyped that AMD would be my savior. I hope you're wrong!!
I'll find out for myself the next time I upgrade and I switch the current AMD card that I'm using on my Windows PC into the ubuntu system.
If you're manually installing them outside of Ubuntu package management then you need to reinstall them every time you upgrade your kernel. (This is a design decision by Linux to make life harder for closed source drivers, there's nothing Nvidia can do about it)
In my experience the ubuntu nvidia packages were hopeless, I forget exactly what it was but I think even basic stuff like hardware video decoding was not working.
Anyway just basic stuff wasn't working and IIRC the GPU fans would stay at 100% all the time. Just terribly broken.
I'm overall happy with the .run drivers from the site except when they come up at the wrong resolution and need reinstalling as I described.
Whereas I've used linux on several systems with AMD/ATi cards and they've always been flaky.