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When gnome-shell crashes on Linux Mint 12 it usually comes up again within a couple seconds. When it doesn't, it seems that it takes the keyring daemon with it, because after restarting with

while true; do DISPLAY=:0 gnome-shell --replace; done &

it asks for the key passphrase every time I run commands like git pull. How do I restart the keyring daemon (if that's what the problem is here) when restarting gnome-shell?

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up vote 6 down vote accepted

It's a bit tricky as gnome-keyring-daemon sets unique environment parameters before your session starts and this environment is used to access the daemon trough a socket. The environment is copied to every application so there is no way to re-set all environment variables. There's a way which involves manually restarting the daemon, symlinking the old dir to the new one (so the old environment still works) and then starting the individual services.

  1. Ensure there are no gnome-keyring-daemon running (this command should return no pid, if it does you need to kill it)

    pgrep -f gnome-keyring-daemon
  2. Clear old keyring sockets

    rm -rf ~/.cache/keyring-*
  3. Start the daemon process - we use setsid and redirect SDTIN, OUT & ERR so there's no association to our shell/tty. This will create a new directory with control socket in ~/.cache/.

    setsid /usr/bin/gnome-keyring-daemon </dev/null >/dev/null 2>&1
  4. Symlink the new socket directory to the old one (ideally replace the wildcard with the actual directory, but since we removed them all earlier there should be only one):

    ln -s ~/.cache/keyring-* $GNOME_KEYRING_CONTROL

    NB: I don't have your gnome-shell issue, but if you don't have these variables exported from where you start gnome-shell you many need to manually pass the following environment variables to gnome-shell: GPG_AGENT_INFO GNOME_KEYRING_CONTROL SSH_AUTH_SOCK. You should be able to derive the value from the path deleted in #2 (if you have multiple directories you need to look for the most recent).

  5. Start the other gnome-keyring services (they will connect to the daemon using the socket and enable the services on it if all went fine so far):

    /usr/bin/gnome-keyring-daemon --start --components=pkcs11
    /usr/bin/gnome-keyring-daemon --start --components=gpg
    /usr/bin/gnome-keyring-daemon --start --components=ssh

    These last commands will print environment variables... you can ignore them, just make sure there are no socket connection errors.

Also, if you want to cleanup old sockets you can add a @reboot cron entry that does a cleanup:

find ~/.cache/ -maxdepth 1 -type l -name 'keyring-*' -delete
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This should perform a clean reboot of the daemon:

gnome-keyring-daemon -r -d

Source: ArchLinux

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