W520 and hooking to TV - No DisplayPorts show connected in NVidia Control Panel

I had hoped the video would go well, leaving me to just have to worry about the audio issues when trying to drive my TV from the W520. I have the latest BIOS and NVidia Optimus drivers from the Lenovo site.
When connecting the TV to the laptop DisplayPort I tried to bring up the NVidia Control Panel (and also Desktop->Screen Resolution) to see if I could see the second monitor. The 3 DisplayPorts show no connection in the NVidia Control panel. Is this indicative of the cable maybe being bad (Should I at least see one connected even without a cable)?
Other thoughts? Thanks,
Eric

hey ericvn,
have you updated the drivers for your nvidia yet ? The current version right now is 8.17.12.6871 and if yours isn't this version; do update it.
if yours is this version, try uninstalling and reinstalling and at the same time do test the cable on a different unit.
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Is anyone else noticing Any of the following problems using a monitor connected to the w520 using DisplayPort and Lenovo Windows 7? -
When the monitor's power saving is activated by the operating system, and is then woken up, the resolution is badly mangled. It's as if the screen is very heavily zooomed in. The only way I know to fix it is to start the Nvidia control panel by right clicking on the desktop, and selecting resize from "adjust desktop size and position"
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Solved!
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Thank you for the replies everyone. I have installed the drivers as suggested, but unfortunately the problem persists.
I neglected to mention that I'm already running the BIOS in discrete mode only, because I use Linux heavily and optimus doesn't currently work under Linux. I have never seen the problem when using Linux.
I can add a few more details, which I neglected to mention last time. When the problem occurs, and the computer is being shut down, the posterization problem persists even with the generic Windows is shutting down screen. I don't know enough about Windows to know whether the Nvidia driver is being used to output that or not.
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W520 and hooking to TV - No DisplayPorts show connected in NVidia Control Panel

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