Something happened few days ago in my Xubuntu 14.04. None of applications which require admin password won't open. Apps like GParted, Update Manager, File Manager when trying to open a folder as root, etc...

No matter how I start them. From the menu, desktop or in terminal using gksudo. In every case after entering the (the correct) password, the password dialog hides away and then the indicator light of the hard disk starts to blink heavily. But app window won't show up. Task Manager shows that the app uses 25% of CPU-time. And this keeps going no matter how long I wait.

Updating and upgrading work fine when started in terminal using sudo. Nano, leafpad and any GUI apps work fine even when started in terminal as NORMAL user, but not with gksudo nor sudo...

My username has sudo & adm groups. All been working fine for years but suddenly this problem occured. I'm wondering that hard disk usage which never ends. To get rid of that the OS must be rebooted.

So guys, how to sort this out?

  • Any output or error messages when run from the terminal? How about tailing the syslog to see if any messages get logged during this process? tail -f /var/log/syslog – Parto Feb 26 at 17:15
  • Eg. gksudo leafpad, entering the password and then nothing, no errors, no messages. Only pwd dialog disappears and then begins heavy hard disk usage. But in the syslog file few lines did appear, I try add them here: – qwerty193 Feb 26 at 21:32
  • Have a look in here: Tailed syslog – qwerty193 Feb 26 at 21:43
  • No issues in the system log. What about all the logs - repeat the same process but run this instead - tail -f /var/log/*.log – Parto Feb 27 at 10:55
  • 1
    does root have access to your display? – ravery Feb 28 at 14:43

If you're using Thunderbird you might want to look at: How to remove "Messaging Menu and Unity Launcher integration" from Thunderbird?

I had a similar problem and removing the above-mentioned extension seemed to clear the problem.

I suggest disabling the add-on in Thunderbird to see if your problem goes away before actually trying to remove it.

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