The display supports 50Hz and Xorg is using a 50Hz modeline. The display also reports it is running at 50Hz when I verify the projector settings.
Other sources play 50Hz material fine (without judder), so the issue is definitely not with the display. The codec overlay in XBMC reports 25fps, however.
From the log–
00:28:46 T:140386457335552 NOTICE: running thread: CDVDPlayerAudio:
rocess()
00:28:46 T:140386457335552 NOTICE: Creating audio stream (codec id: 86019, channels: 2, sample rate: 48000, pass-through)
00:28:46 T:140386465728256 NOTICE: fps: 25.000000, pwidth: 1280, pheight: 720, dwidth: 1280, dheight: 720
00:28:46 T:140386465728256 NOTICE: Display resolution ADJUST : HDMI2: 1920x1080 @ 50.00Hz (18) (weight: 0.000)
00:28:46 T:140388494354304 NOTICE: Using GL_TEXTURE_2D
00:28:46 T:140388494354304 NOTICE: GL: Selecting Single Pass YUV 2 RGB shader
00:28:46 T:140388494354304 NOTICE: GL: NPOT texture support detected
00:28:46 T:140388494354304 NOTICE: GL: Using GL_ARB_pixel_buffer_object
00:28:46 T:140388494354304 NOTICE: CWinSystemX11::SetFullScreen - calling xrandr
[...]
What about the audio stutter on pause issue–is it known already or should I post a debug log for it?