Update on problem #3: I had my "/home" encrypted. Now I reinstalled my system without encryption, and the freeze problem seems to have been solved. This was the most serious usability issue- Ubuntu team should look into it.
Other problems (#1, 2, and 4) persist.
Update on problem #3: I had my "/home" encrypted. Now I reinstalled my system without encryption, and the freeze problem seems to have been solved. This was the most serious usability issue- Ubuntu team should look into it.
Other problems (#1, 2, and 4) persist.