Suddenly, and without changing anything in my system, the keyring is locked and won't unlock with my password. I googled this, and all the solutions said to disable Auto-Login. I've never used Auto-Login. Short of reinstalling the OS, is there a way to fix this?
Edit: The message from Seahorse is: "The password you use to log into this computer no longer matches the keyring password"
Edit #2: It started when I opened the Minecraft Launcher. I have been playing MC on this computer for a few weeks now, so it isn't a new installation. It asked for my MC password, then I got that keyring popup. MC launched fine. What I did was delete the "login" key from Seahorse, restart the system, and now it works again.