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iMX6DualLite : Getting flicker in display with x-window XRandR

Question asked by koichi sakagami on Jun 5, 2015

Dear community,

 

We are making a x-window appllication software. ( BSP Rev is 3.14.28 )

When the application update a screen ,we get flicker.
Especially, using a XRandR for screen rotation , a screen is distracted step-like.

 

How can I avoid the flicker ?
Could you advise us a workaround ?

 

I think that this phenomenon is related with two bugs as follows.

Is it correct ?

 

1."xrand rotation is not accelerated by GPU"

Reduced graphic performance with rotated screen (imx6, sabresd)

2."Tearing ,it is described on i.MX 6 Graphics User’s Guide"

 

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I captured the SABRESD display, please refer to an attached file.

 

The reproduction methods of the phenomenon are as follows.

  $ flickering.sh &
  $ export DISPLAY=:0.0
  $ xrandr
  $ xrandr -o right

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Best Regards,
Koichi Sakagami

Original Attachment has been moved to: flickering.sh

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