[Bug 257345] New: Compositing is disabled without proper explanation

[Yuri]

https://bugs.kde.org/show_bug.cgi?id=257345

           Summary: Compositing is disabled without proper explanation
           Product: kde
           Version: 4.5
          Platform: FreeBSD Ports
        OS/Version: FreeBSD
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: yuri at tsoft.com


Version:           4.5 (using KDE 4.5.3) 
OS:                FreeBSD

When kde comes up it has compositing disabled.
When I try to enable it I get this message:
compositing has been suspended by another application, press alt+shift+f12 to
resume.

This really doesn't give an explanation what's wrong. Which application? Why?
What to do to fix the problem?

Message needs to be modified to answer the above questions and to suggest user
what is wrong with the system.

I read in one discussion that "Disable functionality checks" in "System
Settings->Desktop Effects->Advanced" works for some in this situation. In my
case (FreeBSD) it fails: Failed to activate desktop effects using given option.

I use nvidia-driver-256.53.

Desktop effects worked in the past intermittently. Seem to change with system
updates, or maybe driver version?

Reproducible: Didn't try

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