[AMDGPU][CIK] PRIME with DRI3 + stalls rendering

[Mike Lothian]

Alternatively you can switch to the modesetting driver - it works well here

On Wed, 16 Nov 2016 at 01:33 Mario Kleiner <mario.kleiner.de at gmail.com>
wrote:

> 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
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20161116/b715cfab/attachment.html>