thank you for your response.
Trying the command you mention, this is the result I'm getting:
Reading package lists... Done
E: The value 'mantic-proposed' is invalid for APT::Default-Release as such a release is not available in the sources
just to clarify that I had enabled the proposed repo under synaptic package manager the first time, and the mutter package in question was not available from there either.
edit: I went in synaptic and enabled mantic proposed from there, and then I issued the command in question. Doing so the installation of the package in question went fine and the issue seems to be solved.
Hello,
thank you for your response. Release as such a release is not available in the sources
Trying the command you mention, this is the result I'm getting:
Reading package lists... Done
E: The value 'mantic-proposed' is invalid for APT::Default-
just to clarify that I had enabled the proposed repo under synaptic package manager the first time, and the mutter package in question was not available from there either.
edit: I went in synaptic and enabled mantic proposed from there, and then I issued the command in question. Doing so the installation of the package in question went fine and the issue seems to be solved.
Regards!