[Libva] test/decode sample shows blank window

[Xiang, Haihao]

On Sun, 2015-01-11 at 22:44 -0800, Paul A. Steckler wrote:
> Yes, I mean the mpeg2vldemo program.
> 
> In fact, I had the master branch checked out from
> github.com/gbeauchesne/libva.git, which
> appears to differ from the "official" repository.
> 
> I checked out the repo at anongit.freedesktop.org/git/libva.When I run
> mpeg2vldemo with that
> code, it reports the VA API version as 0.37.0.
> 
> And I get the same behavior as with the other code. But, yes, when
> kill the cinnamon window
> manager in Linux Mint, I see the image of what appears to be a baby!
> 
> What causes this behavior?

I don't know exactly the cause of this issue. Some possible reasons are:
1. libva driver handles a small drawable wrongly.
2. libva driver gets wrong parameters from X server.
3. X server swaps front/back buffer wrongly for a small drawable.

If possible, could you give a try with the latest X server and
xf86-video-intel ?

Thanks
Haihao


> 
> -- Paul
> 
> 
> 
> 
> On Sun, Jan 11, 2015 at 9:18 PM, Xiang, Haihao <haihao.xiang at intel.com> wrote:
> >
> > Hi Paul,
> >
> > Do you mean mpeg2vld in test/decode ? Can you reproduce this issue
> > stably with the latest master branch in your side ? Could you give a try
> > without window manager ?
> >
> > Thanks
> > Haihao
> >
> >
> >> I'm able to build libva and the test programs on my Linux Mint
> >> laptop, which has an Intel GPU, which "lspci" identifies as "Intel
> >> Corporation 3rd Gen Core processor Graphics Controller".
> >>
> >> I'm particularly interested in getting the test/decode sample to work.
> >> When I run it, with an argument so that the the frame should be displayed,
> >> I get an X window to appear, but it's blank.
> >>
> >> There is text output that shows calls to va_GetDriverName() and va_openDriver(),
> >> both of which return 0 (success). The driver that's loaded is called
> >> i965_drv_video.so.
> >>
> >> Is this a known issue? Can you suggest a way to debug it?
> >>
> >> -- Paul
> >> _______________________________________________
> >> Libva mailing list
> >> Libva at lists.freedesktop.org
> >> http://lists.freedesktop.org/mailman/listinfo/libva
> >
> >