I'm running Ubuntu 12.04 with ATI Radeon 6870 connected to my 40' Sharp TV.

The video image is slightly jigged, like breaking a bit and slightly delayed. It just isn't smooth. The computer is very fast, like i7 with 12gb ram. I tried to run the same video with my mac laptop and on the tv with the same connection cable and it was running smoothly.

i tried changing the video output in VLC to x11, increase caching, h264 skip loop filter to all, increase monitor refresh rate although it's already at 60 and it's an LCD tv.

this is my xorg.conf :

Section "ServerLayout"
        Identifier     "amdcccle Layout"
        Screen      0  "amdcccle-Screen[3]-0" 0 0
EndSection

Section "Module"
        Load  "glx"
EndSection

Section "Monitor"
        Identifier   "0-DFP9"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
        Option      "TargetRefresh" "60"
        Option      "Position" "0 0"
        Option      "Rotate" "normal"
        Option      "Disable" "false"
        Option      "PreferredMode" "1920x1080"
EndSection

Section "Monitor"
        Identifier   "0-DFP10"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
        Option      "PreferredMode" "1280x1024"
        Option      "TargetRefresh" "60"
        Option      "Position" "0 0"
        Option      "Rotate" "normal"
        Option      "Disable" "false"
EndSection

Section "Device"
        Identifier  "amdcccle-Device[3]-0"
        Driver      "fglrx"
        Option      "Monitor-DFP9" "0-DFP9"
        BusID       "PCI:3:0:0"
EndSection

Section "Screen"
        Identifier "Default Screen"
        DefaultDepth     24
EndSection

Section "Screen"
        Identifier "amdcccle-Screen[3]-0"
        Device     "amdcccle-Device[3]-0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection