error getting authority: error initializing authority: could not connect: connection refused (g-io-error-quark, 39)
 

When I try to boot into Sabayon Gnome, I get that error message. Here some screens: https://imgur.com/a/syFUG
I've already tried adding the no-fail option whithin fstab (http://askubuntu.com/questions/63136...connect-no-suc), resulting in a non accesible session since it won't recognize my passwd in the login screen. In fact, it doesn't even tell it is wrong at all, it just goes back to the previous screen, where I had previously typed my pass.

Hi,
what you can try is this: boot into a shell and either fix/fsck the partition or lookup and maybe correct the UUID. To do this, follow these steps (hard to say without seeing the prompts):
When the bios is over and the linux boot menu is there, stop it. Either move the cursor keys up/down to stop the countdown or press <Shift> to even see the options.
Edit the grub command: "e" should give you the option to edit stuff.
Move in the linux by cursor and scroll down to the line starting "linux ..."
Add "init=/bin/bash" at the end of that line (without the quotation marks)
F10 or Ctrl-x should boot now.
When you are in a shell:
fsck /dev/disk/by-id/... (from your photo)
If it says that the disk/path doesn't exist then the UUID changed. Take a look what might be your home patition in
cat /proc/partitions
The #blocks line devided by 2 gives you the size in kilobytes. When you think you have the partition number (e.g. sda4)
blkid /dev/sda4
Now mount your root-partition read-write:
mount -o remount,rw /
vi /etc/fstab
<press i to change the uuid and afterwards press <ESC> "zz" (without the quotation marks again)>
mount -o remount,ro /
Ctrl-d
Now your kernel should hang ;-)
Power off by pressing the power button for > 5 Seks. Reboot normally and cross fingers.

HTH,
Upuetz