[mythtv-users] Video Tearing

[Peter Bennett (cats22)]

On 10/18/2014 11:32 PM, Daryl McDonald wrote:
>
>
> On Sat, Oct 18, 2014 at 10:21 PM, Jay Foster <jayf0ster at roadrunner.com
> <mailto:jayf0ster at roadrunner.com>> wrote:
>
>     I'm setting up a new mythbuntu 14.04.1 system with an nvidia GT730
>     video card (nvidia 331 driver).  I am trying to get rid of the
>     tearing.  I have been following the suggestions at
>     http://www.mythtv.org/wiki/Frame_display_timing, but I am not
>     having any success.  I have added the udev rule to change
>     permissions on /dev/rtc and verified that they are correct.  I
>     have added an entry to /etc/sysctl.conf to set the max-user-freq
>     and verified that it is correct.
>
>     The output of mythtvfrontend.real -v playback:
>     2014-10-18 19:06:55.555103 I  VDP: GetFilteredDeint() : xv-blit ->
>     'linearblend'
>     2014-10-18 19:06:55.555437 I  FilterManager:
>     GetFilterInfo(convert) returning: 0x0
>     2014-10-18 19:06:55.555446 I  FilterManager:
>     GetFilterInfo(linearblend) returning: 0x3d7b320
>     2014-10-18 19:06:55.555468 I  VideoOutput: Using deinterlace
>     method linearblend
>     2014-10-18 19:06:55.555482 E  VSYNC: DRMVideoSync: VBlank ioctl
>     did not work, unimplemented in this driver?
>     2014-10-18 19:06:55.555498 E  VSYNC: RTCVideoSync: Could not set
>     RTC frequency:
>                eno: Permission denied (13)
>     2014-10-18 19:06:55.555687 I  Player(0): Video timing method:
>     USleep with busy wait
>     2014-10-18 19:06:55.555697 I  Player(0): Display Refresh Rate:
>     59.869 Video Frame Rate: 59.941
>     2014-10-18 19:06:55.555703 I  Player(0): SetFrameInterval ps:1 scan:1
>     2014-10-18 19:06:55.556536 I  playCtx: StartPlaying(): took 0 ms
>     to start player.
>
>
>     ls -l /dev/rtc*
>     lrwxrwxrwx 1 root root      4 Oct 18 19:05 /dev/rtc -> rtc0
>     crw-rw-rw- 1 root root 254, 0 Oct 18 19:05 /dev/rtc0
>
>     cat /proc/sys/dev/hpet/max-user-freq
>     1024
>
>     Any ideas on what to try next?
>
>     Jay
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>
>
> I have better luck with the 304 driver, and tearing with the 331.
>
>

Did you disable composite?

Run sudo nvidia-xconfig --no-composite
OR, add this to /etc/X11/xorg.conf or a file in /etc/xorg.conf.d:
Create file /usr/share/X11/xorg.conf.dG/55-mythtv.conf, or 
/etc/X11/xorg.conf
Section "Extensions"
    Option             "Composite" "Disable"
EndSection
NOTE This is incompatible with unity desktop in 13.04 and later
You will have to install and use xfce desktop manager instead of unity
Peter
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