[xine-devel] video_out_fb and FBIOPAN_DISPLAY

[Peter Z. <a.p...@ch...>]

heyaz,

I just got f1rmb to include fb support in xine-ui xitk again so I can
watch my divx files on my TVout again, thanks daniel.

The next problem is that framebuffer devices are not vsync'ed, hence
tearing the picture. I own a matrox G400 max and use the second head
(crtc2 on /dev/fb/1) to drive the TV. DirectFB has a patch that enables
the matrox driver to vsync with interrupts, so I patched my kernel,
rebooted since one cannot unload the console modules, started X again,
and noticed that it wouldn't do me any good since the mga X driver
disables the interrupt :(. This was noticed when, after modifying
'video_out_fb.c:fb_display_frame' to include a ioctl FBIO_WAITFORVSYNC,
xine hung, just waiting to receive a interrupt.

Well,. since I already was in fb_display_frame I saw that vsync'ing
could be done with FBIOPAN_DISPLAY. So I went searching for why this
didn't work for me. I found out that for FBIOPAN_DISPLAY to work the
matrox_crtc2.o module needs a tty. So I got con2fb from the
mplayer/TVout tree and mapped /dev/fb/1 to a tty. Guess what,. it
worked, no tear in sight, HOWEVER.... the video playback was jerky as
can be.

Anybody any ideas on how I can fix it?

regards,

Peter Zijlstra