[mythtv-users] Upgraded to fixes/30, nvidia vdpau displaying at wrong refresh rates

[TimP]

Hi,

I've recently upgraded to fixes/30, built using the packaging git repo 
for Debian 10. It was fixes/29 on Debian 9. It's attached to a Panasonic 
TV via HDMI and it used to change refresh rates to match what was being 
shown even down to 24Hz. After the upgrade it's getting it wrong every 
time. I think mythfrontend is using RandR version 1 instead of version 
1.2 or later as in the settings I can get to the "Separate video modes 
for GUI and TV playback" and the refresh rates available are 
50,51,52,53...

Here is the output of xrandr --s1:

SZ: Pixels Physical Refresh
*0 1920 x 1080 ( 487mm x 274mm ) 50 52 53 54 55 56 *57
1 1280 x 720 ( 325mm x 182mm ) 51 58 59
2 720 x 576 ( 182mm x 146mm ) 60
3 720 x 480 ( 182mm x 121mm ) 61
4 640 x 480 ( 162mm x 121mm ) 62
5 800 x 600 ( 203mm x 152mm ) 63
Current rotation - normal
Current reflection - none
Rotations possible - normal left inverted right
Reflections possible - X Axis Y Axis

With xrandr --s12 and just plain xrandr:

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x 
axis y axis) 698mm x 392mm
1280x720 50.00 + 60.00 59.94
1920x1080 60.00* 59.94 50.00 23.98 60.05 60.00 50.04
720x576 50.00
720x480 59.94
640x480 59.93
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)

Can anyone suggest a way to fix this?

Cheers,

Tim.