OpenGL crashes Radeon R7

[Jonathan Ryshpan <jonrysh@xxxxxxxxxxx>]

I have just installed a Sapphire AMD Radeon R7 240 graphics card on my desktop system, which runs OK except that invoking
>     Kinfocenter->Graphical Information->OpenGL
appears to crash the graphics driver.  The symptom is that the session restarts with a large number (8) of crash warnings reported by Drkonqi, the KDE Crash Handler.  None of these error messages seems to be very informative, however here is part of the output of the 1st one:
>     Details:
>     Executable: akonadi_maildispatcher_agent PID: 4234 Signal: Aborted (6) Time: 11/01/14 10:18:16 PM

The system is Fedora-20 with all upgrades running on a 4 CPU x86_64 system.  

The graphics hardware identifies itself as:
>     $ lspci | grep -i vga
>     01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Oland PRO [Radeon R7 240]
The video drivers are:
>     $ lsmod | grep radeon
>     radeon               1415819  3 
>     i2c_algo_bit           13257  1 radeon
>     ttm                    80807  1 radeon
>     drm_kms_helper         58041  1 radeon
>     drm                   291361  6 ttm,drm_kms_helper,radeon
>     i2c_core               55486  7 drm,i2c_piix4,drm_kms_helper,i2c_algo_bit,v4l2_common,radeon,videodev
Before I install the proprietary drivers from AMD, I'd like to see if the open source drivers can be got to work.  Any advice is welcome.

Thanks


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