[mythtv-users] mythtv and judder free playback

[Phil Wild]

On 26 October 2010 09:39, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> Hi
>
> On 26 October 2010 03:34, John Drescher <drescherjm at gmail.com> wrote:
>> I believe the part of problem is nvidia drivers do not (by default)
>> report the correct frequency in xrandr.
>>
>> For me I believe 50 Hz is reported and that really means 85 Hz on my
>> CRT monitor.
>
> This is irrelevant for MythTV ; those are "TwinView" xrandr values,
> and mythtv supports those and will properly retrieve the correct
> value.
>
> e.g. it "knows" that the 50Hz entry is in fact 85Hz.
>
> The issue is that xorg.conf was set with a list of refresh rate that
> the TV doesn't support. Either you don't touch xorg.conf at all and
> only rely on the values provided by the TV, or you manually configure
> the refresh rates in xorg.conf , but only put there the ones you know
> your TV supports.

Below is my xorg.conf file and xrandr reports the following (1920x1080
line only)
default connected 1920x1080+0+0 0mm x 0mm
   1920x1080      50.0     51.0     52.0*    53.0     54.0     55.0
 56.0     57.0     58.0     59.0

using xrandr -r X I have worked through 50 through 59 and 53 is the
only entry that does not work. when running xrandr -r 53, the
following entry ends up in the xorg log file
NVIDIA(0): Setting mode "1920x1080_60_1"

This entry does not exist in my xorg.conf file.

What am I doing wrong?

===star xorg.conft===


Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "ServerFlags"
    Option         "Xinerama" "0"
EndSection

Section "InputDevice"

    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "SAMSUNG"
    HorizSync       20.0 - 150.0
    VertRefresh     23.0 - 90.0
        # 1920x1080p @ 50Hz (EIA/CEA-861B)
        # 1920x1080p @ 60Hz (EIA/CEA-861B)
        # 1920x1080p @ 24Hz (EIA/CEA-861B)
        # 1920x1080p @ 23.976Hz (EIA/CEA-861B)
        # 1920x1080i @ 50Hz (EIA/CEA-861B)
        # 1920x1080i @ 60Hz (EIA/CEA-861B)
        # 1920x1080p @ 59.94Hz (EIA/CEA-861B)
        # 1920x1080i @ 59.94Hz (EIA/CEA-861B)
        # 1920x1080p @ 25Hz (EIA/CEA-861B)
        # 1920x1080p @ 29.97Hz (EIA/CEA-861B)
        # 1920x1080p @ 30Hz (EIA/CEA-861B)

    Option         "PreferredMode" "1920x1080 at 50"
    Option         "DPMS"
    Option         "ExactModeTimingsDVI" "True"
    Option         "NoLogo" "False"
    Option         "UseEDIDD" "False"
    Option         "UseEDIDDpi" "False"
    Option         "UseEDIDFreqs" "False"
    Option         "DPI" "200 x 200"

EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "ION"
    Option "HWCursor" "false"
    Option  "ModeDebug"           "true"
EndSection

Section "Screen"

    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "metamodes" "nvidia-auto-select +0+0; 1920x1080 +0+0"
    Option         "FlatPanelProperties" "Scaling = Native"

        SubSection "Display"
                Depth     24
                Modes "nvidia-auto-select+0+0" "1920x1080+0+0"
"1920x1080_60_0" "1920x1080_50" "1920x1080_30" "1920x1080_25"
"1920x1080_24" "1920x1080_60i" "1920x1080_50i"

        EndSubSection

EndSection
===end===