Regression: Cairo-Dock is now fully transparent with xserver-xorg-video-intel 2:2.20.19-0ubuntu2

Hello,

Firstly, thank you for developing these free drivers!

I'm now using the latest version of xf86-video-intel from git (778dba90c - "sna/dri: Don't contribute missed frames to the target_msc") and my bottom dock of Cairo-Dock is now fully transparent.
I didn't have this bug with the latest stable version (2.20.19) and I'm using i915 module.

  $ glxinfo| grep OpenGL
   OpenGL vendor string: Intel Open Source Technology Center
   OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile
   OpenGL version string: 2.1 Mesa 9.0.1

  $ lspci | grep VGA
   00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 12)
   01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI M96 [Mobility Radeon HD 4650] (rev ff)

If you do suspect it is a DDX bug, please do try and bisect it.

commit d60128c55e8f5f69476d42c20f2fd62ccc0f411e
Author: Chris Wilson <email address hidden>
Date: Thu Jan 24 15:41:29 2013 +0000

    sna/dri: Compensate clipExtents for drawable offset

    The clipExtents is in screen coordinates whereas we just want to confirm
    that the maximum pixel to be copied lies with the DRI2 buffer, which is
    relative to the drawable.

    Reported-by: Matthieu Baerts <email address hidden>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59806
    Signed-off-by: Chris Wilson <email address hidden>

Sigh, I was testing one thing and completely thought about the testing the other...

(In reply to comment #2)
> commit d60128c55e8f5f69476d42c20f2fd62ccc0f411e

Thank you for this quick fix :)
I confirm that this new commit fixes this bug!

Regards,

Matt