[mythtv-users] ION + VDPAU + no composite and still tearing

[Brian J. Murrell]

On Wed, 2010-12-22 at 16:36 +0000, James Courtier-Dutton wrote: 
> 
> The Nvidia driver has a mode called "scaling mode".

In my nvidia-settings it's in the "DFP-0 (LG TV)" page under "GPU 0 -
(ION LE)" in a box on the top right labelled "Flat Panel Scaling".

> By default this is set to "Full".

Mine is currently unchecked at all and the Scaling: attribute says
"None".

> Set it to "None".   (The nvidia-settings tool can be used to set this.)

Indeed, I already had this set, so it was None even when I was getting
tearing.

> xrandr --prop    (will tell you what mode it is currently using.)

Screen 0: minimum 320 x 175, current 1920 x 1080, maximum 1920 x 1080
default connected 1920x1080+0+0 0mm x 0mm
   1920x1080      50.0     51.0*    52.0     53.0     54.0     55.0  
   1680x1050      56.0     57.0  
   1440x900       58.0  
   1400x1050      59.0     60.0     61.0  
   1360x768       62.0     63.0     64.0  
   1280x1024      65.0     66.0     67.0     68.0     69.0  
   1280x960       70.0     71.0  
   1280x768       72.0  
   1280x720       73.0     74.0  
   1152x864       75.0     76.0     77.0     78.0     79.0     80.0     81.0  
   1024x768       82.0     83.0     84.0     85.0     86.0     87.0     88.0     89.0  
   960x600        90.0  
   960x540        91.0  
   840x525        92.0     93.0     94.0     95.0     96.0  
   832x624        97.0  
   800x600        98.0     99.0    100.0    101.0    102.0    103.0    104.0    105.0    106.0  
   720x480       107.0  
   720x450       108.0  
   720x400       109.0  
   700x525       110.0    111.0  
   680x384       112.0    113.0  
   640x480       114.0    115.0    116.0    117.0    118.0    119.0    120.0  
   640x400       121.0  
   640x350       122.0  
   512x384       123.0    124.0    125.0  
   400x300       126.0  
   320x240       127.0    128.0  
   320x175       129.0  

> When switched to "None", the video modeline seen by the application
> matches that of the TV and tearing disappears.

FWIW, the "Flat Panel Information" box to the left of the "Flat Panel
Scaling" box says that I am currently at a Native Resolution and
Frontend Resolution (i.e. both) of 1920x1080 and that my Refresh Rate:
is 59.94 Hz.  IIRC however, that refresh will change depending on the
source material, which is good and what I want.

> Also, enabling OpenGL instead of QT output mode in mythfrontend seems
> to help the tearing, but I don't know why.

I think I have that set already.  Which setup screen is it in?

> Kind Regards

Much thanx for all of the pointers!

b.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part
URL: <http://mythtv.org/pipermail/mythtv-users/attachments/20101222/8218e84e/attachment.pgp>