Thread: HDTV Liney/wavey at high resolutions [Solved]

I am running R5F27 Version of Knoppmyth FE/BE and anything above 1024x768 results in HD video playback being liney/wavey. It plays at the right speed with no jittering.

Just curious if anyone on the mythtvtalk forums has seen this before?

Hardware:
P4 2.4 Ghz
ASUS P4P800E Deluxe
1 GB DDR (2x 512MB in dual channel mode)
Nvidia GeForce FX5500
Dvico DVB HDTV+
TP Link Wireless card (Atheros chipset)
Viewsonic VX2835WM connected via DVB -> HDMI @ 1900x1200
120GB WD Sata, ext3 for /
2x 250GB Maxtor Sata using LVM, xfs for /myth

MythTV version: 0.20.20070821-1

SD Playback is smooth. XvMC is enabled, as the processor is a little underpowered to do HD Playback without it. I have tried without XvMC, playback is a little jittery, but the lines are still there, so one would assume not the fault of XvMC (also XvMC was enabled when playing HD back at 1024x76.

I could run at 1024x768, but defeats the purpose of HD and also throws the aspect ratio out, being a widesceen monitor. I have tried multiple other 19x10 resolutions (HDMI scales it properly, so it doesn't blur on the LCD) but all are wavey/liney.

My xorg.conf:

Code:

Section "ServerLayout"
    Identifier     "Default Layout"
    Screen         "Default Screen" 0 0
    InputDevice    "Generic Keyboard"
    InputDevice    "Configured Mouse"
EndSection

Section "Files"

	# path to defoma fonts
    FontPath        "/usr/share/fonts/X11/misc"
    FontPath        "/usr/X11R6/lib/X11/fonts/misc"
    FontPath        "/usr/share/fonts/X11/cyrillic"
    FontPath        "/usr/X11R6/lib/X11/fonts/cyrillic"
    FontPath        "/usr/share/fonts/X11/100dpi/:unscaled"
    FontPath        "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
    FontPath        "/usr/share/fonts/X11/75dpi/:unscaled"
    FontPath        "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
    FontPath        "/usr/share/fonts/X11/Type1"
    FontPath        "/usr/X11R6/lib/X11/fonts/Type1"
    FontPath        "/usr/share/fonts/X11/100dpi"
    FontPath        "/usr/X11R6/lib/X11/fonts/100dpi"
    FontPath        "/usr/share/fonts/X11/75dpi"
    FontPath        "/usr/X11R6/lib/X11/fonts/75dpi"
    FontPath        "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
    Load           "bitmap"
    Load           "dbe"
    Load           "ddc"
    Load           "extmod"
    Load           "freetype"
    Load           "glx"
    Load           "int10"
    Load           "record"
    Load           "v4l"
    Load           "vbe"
EndSection

Section "InputDevice"
    Identifier     "Generic Keyboard"
    Driver         "kbd"
    Option         "CoreKeyboard"
    Option         "XkbRules" "xorg"
    Option         "XkbModel" "pc104"
    Option         "XkbLayout" "us"
EndSection

Section "InputDevice"
    Identifier     "Configured Mouse"
    Driver         "mouse"
    Option         "CorePointer"
    Option         "Device" "/dev/input/mice"
    Option         "Protocol" "ImPS/2"
    Option         "Emulate3Buttons" "true"
EndSection

Section "Monitor"
    Identifier     "HP"
    HorizSync      28.0 - 51.0
    VertRefresh    43.0 - 60.0
    DisplaySize    426 266
#    DisplaySize	   487 304
    Option         "DPMS"
    Option "ModeValidation" "NoMaxPClkCheck"
EndSection

Section "Device"
    Identifier     "GeForce 5500"
    Driver         "nvidia"
    VideoRam        262000
    Option "UseEvents" "True"
    Option "NvAGP" "2"
    Option "RenderAccel" "1"
EndSection

Section "Screen"
    Identifier     "Default Screen"
    Device         "GeForce 5500"
    Monitor        "HP"
    DefaultDepth    24
    Option         "UseFBDev" "true"
    DefaultFbBPP     32
	SubSection "Display"
		Depth     8
		FbBPP     32
		Modes    "1920x1200"
	EndSubSection
	SubSection "Display"
		Depth     16
		FbBPP     32
		Modes    "1920x1200"
	EndSubSection
		SubSection "Display"
		Depth     24
		FbBPP     32
#		Modes    "1024x768"
#		Modes    "1280x800"
#		Modes    "1680x1050"
		Modes    "1920x1200"
	EndSubSection
EndSection

I have tried with/without de-interlace and all the different types.

Picture is perfect everywhere else, SD playback, DVDs, Video streamed off a samba share etc. Just HD playback.

If anyone has some clues it would be much appreciated, as the want for HD has grown with Aus FTA broadcasting different shows on HD that aren't on SD.

Well found this:

http://www.mythtv.org/wiki/index.php...river_ModePool

So added:

Modes "1920x1080_60" "1280x720_60" "720x480_60"

At the end of the day, whilst technically a monitor, it has HDMI. So I figured I'd treat it like a telli.

All good now. Master BE/FE P4 2.4, happy to say that even old hardware can be turned into something useful!