On 17.10.2017 12:41, Michel Dänzer wrote:
On 17/10/17 12:29 PM, Nicolai Hähnle wrote:
On 17.10.2017 12:07, Michel Dänzer wrote:
On 17/10/17 11:33 AM, Nicolai Hähnle wrote:
From: Nicolai Hähnle <nicolai.haeh...@amd.com>
When enabled, this will request FreeSync via the hybrid amdgpu DDX's
AMDGPU X11 protocol extension.
Due to limitations in the DDX this will only work for applications
that cover the entire X screen (which is important to keep in mind when
you have a multi-monitor setup).
This limitation already applies to page flipping in general, it's not
specific to FreeSync.
Maybe it shouldn't apply in general? After all, what if you have one
monitor with 60Hz and one with 90Hz?
Page flipping can be used in that case. The application's buffer swaps
will be synchronized to one or the other CRTC, by default the one where
the largest part of the window is visible on. On the other CRTC(s), each
flip may take effect slightly earlier or later than on the
synchronization CRTC.
Hmm. I seem to have lost the plot and/or we're talking past each other.
Maybe we need to go back to square one?
To rephrase the point that I was trying to get across: When you have a
multi-monitor setup, and your application window covers (only) one of
these monitors, then FreeSync will *not* be enabled.
At least that's how I understand the current DDX implementation, and I
think it's surprising enough that it should be pointed out explicitly.
Cheers,
Nicolai
--
Lerne, wie die Welt wirklich ist,
Aber vergiss niemals, wie sie sein sollte.
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