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Lag in graphics with duplicate displays after new driver install.

Question asked by bobicksgolf on Sep 1, 2015
Latest reply on Sep 1, 2015 by bobicksgolf

We have a Radeon 6700 graphics card with the new driver installed, and duplicate desktop displays cause lag in our software.  We tried to roll back the driver, and had no success.  When I disabled the HDMI outputs, and ran only the monitor.  After that the software ran perfect.  Is there a difference in settings that could have been applied automatically in the changing of drivers?