Question about xserver commit 47bc7fca

[David Airlie]

----- Original Message -----
> From: "Michel Dänzer" <michel at daenzer.net>
> To: "Qiang Yu" <Qiang.Yu at amd.com>, "David Airlie" <airlied at redhat.com>
> Cc: "Hans de Goede" <hdegoede at redhat.com>, "Michel Daenzer" <Michel.Daenzer at amd.com>, xorg-devel at lists.x.org
> Sent: Wednesday, 18 January, 2017 12:30:05 PM
> Subject: Re: Question about xserver commit 47bc7fca
> 
> On 15/01/17 11:39 AM, Yu, Qiang wrote:
> > 
> > My problem is on a two GPU platform secondary GPU has output and attached
> > to the primary GPU
> > (which is always done even no monitor is connected to the secondary GPU on
> > Ubuntu), compiz using
> > DRI3/Present can't do page flip so some tearing observed when moving
> > windows on the desktop.
> 
> Sounds like the code preventing page flips does so based on the wrong
> thing (the mere presence of slave outputs that could be used, as opposed
> to one of them actually being used).

Yes definitely, ideally we could go further, at the time I found the bug,
fixing it properly first was more important than making it work great.

Dave.