Roman, for me it happens when i try to open (again) a pd-subpatch that i previously placed on the second monitor (on the left of the main monitor) : instead of appearing in its previous position, the window appears outside the screen (on the right of the right screen), so you can't see it, drag it back...
Yes Nicolas, I experienced this with the "additional" monitor on the left, so subpatches should probably have negative coordinates.

Hope this gives a clue to solve this, patching on two monitors is nice for big patches...

all best

raphaël

2017-09-14 9:05 GMT+02:00 Nicolas Montgermont <list@nimon.org>:
IIRC, the problem is happening more when you have your second monitor on the left / main monitor on the right?
It must have something to do with a negative x position.
What i usually experienced is a problem when working on the same patch with someone with two monitors, main monitor on the left and for me main monitor on right.
The patch appears on the far right of the right screen - impossible to see or edit.
The workaround is to unplug the second screen, the patch appears, and save it to this new position.
n
http://nimon.org
Le 14/09/2017 à 08:45, Roman Haefeli a écrit :
Hi Ali

On Mit, 2017-09-13 at 11:03 -0400, Ali Momeni wrote:

I'm using MacOS 10.12.6

I'm impressed that so many pd versions and platforms have this issue.
It's a very difficult problem to deal with; Pd is essentially
unusable with multiple screens.

I'm a regular multi-screen user and didn't encounter problems.


Does anyone have an intuition of how Pd manages to break the OS's
window management?

Can you elaborate some more? I don't really understand the difference
between what you expect and what you experience. 


Anything to look into?

Can you describe an exact example of what you do, what you expect and
what actually happens?

The canvas positions are saved with the patch and I haven't experienced
any inconsistencies with that. But I imagine you can trick it into
doing funny things when you save a position that is non-existent when
you open the patch again. Let's say you have the second screen right of
the first screen, then any canvas put there will have position values
bigger than your first screen. I actually don't know what happens when
you open that patch with a single-screen desktop. My window manager
tries to place it in the nearest free screen space from top left.

Roman 


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