How to auto-unlock Keyring Manager?

Solution 1:

For 12.04

Thanks to @duffydack's hint, I discovered this:

• In the Password application, right-click the Passwords: default
  
• Select Change password
• Enter the old password, and no new password then click OK
• Confirm to use unencrypted passwords:
  

... But oddly, this does not work: after rebooting, I must enter the password again. Any hints?

Solution 2:

For Ubuntu 12.10:

There is a known bug in Seahorse (the password and keys management app) that causing it unable to change login password or automatic keyring unlock setting, with error message "GDBus.Error: org.freedesktop.Secret.Error.NoSuchObject:The collection does not exist". See this bug report on Launchpad.

This however has been fixed, so you need to download and install the updated version. You can do this with

sudo apt-get update
sudo apt-get install seahorse

Open seahorse and go to View -> By Keyring. Now right click the login password and choose change. Enter your password when asked for the first time but leave the new password blank. It'll ask for a confirmation and after that you should be good to go.

I found the info here.

Solution 3:

Run the Password and Encryption Keys tool from the terminal - type seahorse and press Enter.