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Tearing and drop in FPS after blanking FB

Question asked by Mathieu Slabbinck on Jan 22, 2016
Latest reply on Mar 24, 2016 by Mathieu Slabbinck

Hi,

 

I'm having an issue on the i.MX6 duallite platform.

The platform is using a modified version of 3.10.53 BSP with a FB backend.

 

normally, the main application that runs can get up to around a stable 30fps.

But if the screen is blanked and set back to normal again with:

$ echo 1 > /sys/class/graphics/fb0/blank

$ echo 0 > /sys/class/graphics/fb0/blank

the FPS drops dramatically to around 5 to 10 FPS and tearing is clearly visible.

 

The only thing I've noticed is this in dmesg:

[  474.915254] mxc_sdc_fb fb.19: MXCFB_WAIT_FOR_VSYNC: timeout 0

 

The only way to get rid of these issues is restarting the main application, but then again, from the moment you blank the screen, the issues are back.

 

Any clues/help is much appreciated!

 

Kr

 

Mathieu

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