I think there's a configuration issue with KDE in Sabayon that's hopefully easy to solve. On the announcement for the latest Sabayon, there's this statement:
/tmp is now mounted on a very small tmpfs with nodev,noexec,nosuid options by default for greater security. Some exotic programs that insist on writing to /tmp may fail to run and they should be fixed upstream. Writing to /tmp is bad, and you should not use any software that behaves like this.
Unfortunately, it seems that one of the supported desktops, KDE, behaves like this. I was poking through System Settings and trying to install different splash screens, plasma themes, etc, and it seems that KDE downloads these into /tmp before unpacking them. I kept running out of space on /tmp trying to install a simple theme.
I'm thinking that there must be some way to tell KDE to use a different directory for /tmp, but I haven't been able to figure out how. Does anybody know how to do this? And if we can figure this out, probably it should be set as the default for new Sabayon installations, so that new users don't run into this.
Does anybody have an idea how to redirect KDE's use of /tmp to somewhere else? I was thinking $USER/tmp might be a good place.