Hi Antonio,

I had the same problem but with an Nvidia card on Mint 15 (ubuntu 13.10).

Imho often times is not a software problem, but a firmware issue with the vertical blank and refresh rate.

Does it happens with movies in full screen on an external monitor?

So not sure this below will help you, but it fixed the issue on my machine:

I put the following lines in "/etc/environment" -

CLUTTER_PAINT=disable-clipped-redraws:disable-culling
CLUTTER_VBLANK=True

best,
M

--
Marco Donnarumma
Performer, body tinkerer, teacher and writer.

#soundandmusic #biotech #freeculture

EAVI - Goldsmiths, University of London
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Portfolio: http://marcodonnarumma.com
Research: http://res.marcodonnarumma.com

On Mon, May 26, 2014 at 12:56 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?

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

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