I’ve connected both a Syntax Olevia and an LG TV to my openSUSE desktop.  Neither have worked well because they caused the default font size to be unusably large.  I’m talking gigantically huge, like only a few letters on the screen at any one time.  The solution is to modify your /etc/X11/xorg.conf file.  In the Monitor Section you need to add the following:

Option “UseEDIDDPI” “FALSE”

That’s because these TVs apparently lie to the operating system about their dimensions.  Then change the DisplaySize using the following formula:

DisplaySize = (pixels/desiredDPI)*25.4

So, if I want to run at 96 DPI and 1366×768 resolution then I would set the following in my xorg.conf:

DisplaySize 361 203