I have this same issue, started a couple months ago. Everything worked previously. The fixes mentioned above did not help, other than the "switch user and exit X" tip. Must have a regression somewhere because the most recent comment above is 12 years old (I'm running 20.04).
I have this same issue, started a couple months ago. Everything worked previously. The fixes mentioned above did not help, other than the "switch user and exit X" tip. Must have a regression somewhere because the most recent comment above is 12 years old (I'm running 20.04).