LinuxQuestions.org - graphics card upgrade on linux?

http://www.mythtv.org/wiki/Configuring_HDTV

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Setting up MythTV to fully use HDTV can be rather complicated. There are different HDTV formats for North America and Europe. Parts of this information may apply to other countries that use HDTV as well.

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NVIDIA

The minimum recommended NVIDIA card is the FX 5200. Depending on the manufacturer/model, many have exhibited some odd display issues when playing video at 1920x1080(i or p) via DVI even when not using XvMC. Interestingly, underscanning by 3% in the horizontal direction within MythTV solves the FX 5200s problems.

Recently the market has shifted to the point where the GeForce 6xxx series has entered the sub $50US range. The GeForce 6200 does not exhibit these problems. The 6200TC is used by quite a few list members with excellent results.

NVIDIA has also recently released a line of integrated video GPU's numbered the 6100 and 6150. These are designed to be integrated as onboard video for motherboards such as the Asus M2N-MX, Asus M2NPV-VM, Asus A8N-VM CSM, Abit NF-M2 and DFI C51PV-M2/G. These chipsets use integrated RAM, much like the Turbo-Cache models which means they require system memory.

For HDTV use it is recommended to use the most recent drivers and enable the xorg.conf "UseEvents" option in the "Device" section:

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Option "UseEvents" "True"

After adding UseEvents, Xv Vsync needs to be enabled in the nvidia-settings application. This has proven to solve many "tearing" and other odd video issues people have experienced.

Additionally, it is worth noting that nVidia has made some changes to their driver to eliminate the need for customized Modelines for the popular formats (480i, 480p, 720p, 1080i, 1080p). Check out the NVIDIA_Component_Out wiki entry for more information. The settings listed on that page are no longer specific to Component Output, as they can be applied to HDMI interfaces as well (for those using DVI to HDMI connections). Display (television) manuals often provide specifications for this purpose.

3. Yes Mandriva should work http://www.mythtv.org/wiki/Operating_system#Mandriva

4. Your current card should be sufficient