On a Thinkpad T550 I observed that when using ' optirun glxgears -fullscreen' the framerate is much lower than otherwise. What would be the explanation?
If you look at the following results the Intel-results are :
$ optirun glxgears -fullscreen
109 frames in 5.0 seconds = 21.666 FPS
112 frames in 5.0 seconds = 22.256 FPS
112 frames in 5.0 seconds = 22.234 FPS
$ glxgears -fullscreen
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
303 frames in 5.0 seconds = 60.469 FPS
300 frames in 5.0 seconds = 59.961 FPS
300 frames in 5.0 seconds = 59.965 FPS
$ optirun glxgears
293 frames in 5.0 seconds = 58.567 FPS
300 frames in 5.0 seconds = 59.964 FPS
300 frames in 5.0 seconds = 59.965 FPS
$ glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
303 frames in 5.0 seconds = 60.462 FPS
300 frames in 5.0 seconds = 59.966 FPS
300 frames in 5.0 seconds = 59.965 FPS
$lspci (irrellevant lines removed)
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
08:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 940M] (rev a2)
Johann
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Because experiencing your loyal love is better than life itself,
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