Thanks for the bug report. You appear to be using the 'oibaf' PPA which is unsupported and often causes bugs like this. Please remove it from your system using 'ppa-purge', reboot, and then open new bugs for any further issues you encounter.
Thanks for the bug report. You appear to be using the 'oibaf' PPA which is unsupported and often causes bugs like this. Please remove it from your system using 'ppa-purge', reboot, and then open new bugs for any further issues you encounter.