When running the System Analyzer HUD/System Analyzer, use the Play/Pause keyboard shortcut, which is Ctrl+Shift+P by default, to pause and resume your graphics application.
Another way to pause and resume your graphics application is to use Pause/Continue / buttons in the System Analyzer Control pane.
While capturing a frame or trace file (by default Ctrl+Shift+C and Ctrl+Shift+T respectively), you will see no visual indication that the capture was successfully completed until you use Play/Pause again to resume the game.
In fact, capturing a frame/trace file while paused will cause System Analyzer HUD to disappear until you use either the Play/Pause keyboard shortcut.
Some games and applications trap all keystrokes, so keyboard shortcuts within the Intel® GPA do not work. In this case, to create frame/trace capture files you can:
Use Capture Frame/Capture Trace buttons of the System Analyzer.
Set up a trigger in the Graphics Monitor to automatically create frame/trace capture files when certain conditions occur, for example when FPS is 20.
On some systems, "resume" attempts may take about five seconds. This issue occurs only if the analyzing application uses a keyboard hook procedure of the type
WH_KEYBOARD_LL, and the registry key
LowLevelHooksTimeout is set to a larger value than the default (300 ms). If you regularly use Pause/Resume and resuming takes longer than you are comfortable with, use a registry editor such as
RegEdit to modify the value of this registry key back to the default value of 300 ms.