On 11/15/2016 09:25 AM, Shawn Starr wrote:
On Monday, November 14, 2016 3:40:17 PM EST Shawn Starr wrote:
On Monday, November 14, 2016 10:40:17 AM EST Michel Dänzer wrote:
On 13/11/16 06:59 AM, Shawn Starr wrote:
I'm currently trying the new fence patches that prevent tearing in PRIME
on
Bonaire CIK, it works with no tearing with latest patches from Mario,
but
there is significant frame stalls, even though the performance is higher
than running the AMDGPU as dedicated.
Please elaborate on what "frame stalls" means exactly.
It looks like vsync issues, even though if I try vblank_mode=# it still
shows stalling.
I'll have to make a video to show the results and post link here.
Thanks,
Shawn
So, It turns out to be KDE (Kwin) fault, if I start a GNOME session, and run
Valley, no such stalls. Even though I told KWIN to disable Vsync completely
and disable composite on full screen windows. Seems it doesn't work right.
Consider the PRIME patches working for me.
Thanks,
Shawn
Glad it works for you with GNOME.
Wrt. Kwin, KWin doesn't unredirect fullscreen windows if the display
iGPU is Intel, apparently because sometime in the past there were bugs
in the intel ddx related to switching between redirected and
unredirected mode. That might explain the problem under KDE.
You'd need to disable the compositor manually (SHIFT + ALT + F12 to
toggle at runtime) while running a fullscreen app/game that way, or the
application needs to set some NetWM hints on its window to ask for no
composition, or some KWin rule needs to be set for the app. I tested the
patches under KDE Plasma 5 (KUbuntu 16.04 LTS) with composition disabled
this way and at least my tests worked fine then.
-mario
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