[Libva] VA-API does no v-sync with H264 interlaced videos

[Chris Wilson]

On Sat, Mar 09, 2013 at 05:23:50PM +0100, Lutz Sammer wrote:
> On 03/07/2013 12:32 PM, Daniel Vetter wrote:
> >On Thu, Mar 7, 2013 at 9:38 AM, Lutz Sammer <johns98 at gmx.net> wrote:
> >>vaPutSurface (X11) waits on v-sync?
> >
> >With the minor nit that for a long time the intel X driver didn't
> >implement this on snb/ivb, resulting in tearing. But with kernel 3.8
> >and latest xfree86-video-intel when using the SNA backed it should
> >work.
> 
> The result is that with xf86-video-intel GIT from yesterday,
> libva-intel-driver-1.0.18, libva-1.1.0 and kernel-3.8.2.
> vaPutSurface does no longer wait on vsync.
> 
> With SNA:
> X &; export DISPLAY=:0.0; putsurface -> 75.29 FPS
> CTRL-C
> 
> X crash:
> (EE)
> (EE) Backtrace:
> (EE) 0: X (xorg_backtrace+0x36) [0x58a976]
> (EE) 1: X (0x400000+0x18e659) [0x58e659]
> (EE) 2: /lib64/libpthread.so.0 (0x3b01800000+0x10a90) [0x3b01810a90]
> (EE) 3: ?? [0x1ba0950]
> (EE)
> (EE) Segmentation fault at address 0x1ba0950

Totally useless backtrace. Can you try with gdb?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre