A simple "nixos-rebuild switch --rollback" took the machine back to
16.03.836.aff03ae. Afterwards, a "nixos-rebuild switch --upgrade"
brought it to 16.03.909.f199be0. Machine is working now. Thanks to all
the nix devs who made rollback functionality work so well.
--
- EJR
FWIW, I sometimes use git-bisect to find the first revision where
nixos-rebuild builds something with the problem. It's a huge headache,
though, due to having to reboot so many times and worrying that I
might stumble upon a revision that's more seriously broken.
I just did this to figure out why
I usually try to look at the recent changes to find out what might gotten
wrong, both in the configuration.nix and nixpkgs. Unfortunately I don't
know of a tool that could provide that diff between two generations so I
usually stick to one change at a time.
On Fri, 10 Jun 2016, 01:48 Evan Rowley,
Hi Everyone,
I performed a nixos-rebuild switch --upgrade and after rebooting, was
not able to see my usual KDE session. There was no X session. I
selected a previous generation in gummiboot and was able to have my
KDE session back. What can I do about the upgraded components which
did not work?
