[Libva] VA Initialize hangs frequently

[Kurt Hoffmann]

Hi,

i am using xine player for watching live TV. Xine runs TV playback by using
the xine-lib-vaapi plugin provided at
https://github.com/huceke/xine-lib-vaapi., branch vaapi-testing. When
switching channels, I'am frequently (but not always) facing a kind of
deadlock situation. The Player hangs and does not proceed. The system
itself does not hang or stop in any way. When pressing a keyboard button or
moving the mouse, the player proceeds immediately with TV stream rendering.

When checking the log I figured out that the hanger happens around
vaInitialize call from code fragment below. Are there any suggestions why
this happens? Or what actions I might take to avoid this stupid bug.
I'm testing on SNB system and I'm using libva and i965 from git/vaapi-ext
branch and latest libcxb.  I checked also with different kernels (3.2 and
3.3.) without success.

Any help is appreciated
Kurt


static VAStatus vaapi_init_internal(vo_driver_t *this_gen, int
va_profile, int width, int height, int softrender) {
  vaapi_driver_t      *this = (vaapi_driver_t *)this_gen;
  ff_vaapi_context_t  *va_context = this->va_context;
  VAConfigAttrib      va_attrib;
  int                 maj, min, i;
  VAStatus            vaStatus;
  vaapi_close(this_gen);
  vaapi_init_va_context(this);
  this->va_context->va_display = vaapi_get_display(this->display,
this->opengl_render);
  if(!this->va_context->va_display)
    goto error;
  vaStatus = vaInitialize(this->va_context->va_display, &maj, &min);
  if(!vaapi_check_status((vo_driver_t *)this, vaStatus, "vaInitialize()"))
    goto error;
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