The system is about 80% idle.  What is interesting is I tried using the Gnome Classic desktop and I had the same issue regarding logging out.  The difference is I was never able to logout of Gnome Classic until I killed off the processes.  I also found an curious issue.  The system this problem is occuring on is a laptop, and I have an external monitor attached.  When I loggen into Gnome Classic the external monitor was an extension of the laptop display, i.e. I move the mouse off the right side of the laptop display and it shows up on the external monitor.  I changed the configuration so that the external monitor showed the same as the laptop display.  I also added an icon for gnome-terminal on the desktop.  So far so good.  When I logged out of Gnome Classic and logged back in to MATE the display configuration had changed from what it was before, now under MATE the external monitor was no longer a clone of the laptop display as it was previously, and there was now an icon for the terminal app on the MATE desktop which there was not previously.  I also was unable to mount any external drive under Gnome Classic either, and I got no message about not being authorized.

Is there some kind of interaction between Gnome Classic and MATE? 

As I mentioned I have a second F27 system which does not exhibit these problems.  On both of these systems I have installed VirtualBox from Oracle.  I also installed the VirtualBox extension pack.  On one system, the one that does not show any issues, the install went fine.  On the one having the problems, the install of the extension pack failed with the following error:

The installer failed with exit code 127: Error creating textual authentication agent: Error opening current controlling terminal for the process (`/dev/tty'): No such device or address.

I checked /dev/tty does exist.

Any ideas?

Paolo

On 05/17/2018 10:38 AM, stan wrote:
On Thu, 17 May 2018 08:39:24 -0700
Paolo Galtieri <pgaltieri@gmail.com> wrote:

on my F27 system with MATE desktop.  First issue is that when I tried
to logout it didn't, even though it prompted for logout.  What's 
 
The second issue is that now whenever I plug in an external USB drive
I get a popup saying I'm not authorized to perform the operation.
What's interesting about this last issue is that sometimes it does
mount the drive when I login, however, if I unmount it, unplug it and
plug it back in I get the "Not authorized to perform operation"
message.

These 2 problems only occur on one of my 2 F27 systems running MATE.

Anyone know what might have changed and how do I fix it?
No real help, but these sound like timing issues because of the
intermittent behavior.  Anything using lots of CPU or disk at the time
the problems occur?
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