On Mon, May 26, 2014 at 1:56 PM, Antonio Roberts <antonio@hellocatfood.com> wrote:

Hi,

I'm running Pd Extended 0.43.4 on Ubuntu 14.04. I've got a Dell XPS13
with Intel Ivybridge Mobile i7 graphics and I'm getting lots of screen
tear/flicker when I go full screen with an external monitor attached.
It doesn't matter if I'm full screen on the external or primary
monitor, I still get lots of flicker.

Attached is an example patch that causes this problem (contains
flashing colours)

I've noticed that if I don't go full screen (deleting border 0) then
the flicker stops, but I then have the window borders and menu bar
being displayed.

Is this a problem with GEM?

You can check by playing this youtube vidoe:

https://www.youtube.com/watch?v=5xkNy9gfKOg

If you have tearing in general, try to create a file called /etc/X11/xorg.conf.d/20-intel.conf

with the following options:

Section "Device"

Option "AccelMethod" "sna"

Option "TearFree" "true"

EndSection

(I assume you have an intel gfx card)

If that doesn't help, try to install compton (https://github.com/chjj/compton)

and run it like this:

./compton --backend glx --vsync opengl

(unless you run another compositor manager at the same time, that should work)

--
============================
antonio@hellocatfood.com
http://www.hellocatfood.com
============================

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