For about a month now, I've been using my TV as a second monitor. It's been working out great. Getting a nice nostalgia experience. Playing emulators full screen on my TV and whatnot. Now the only thing that irked me about this was that my TV has a resolution limit of 1360x768. Eventually I got used to it. Now a couple of days ago, out of nowhere I decided to look at my display settings, and all of a sudden, my TV's resolution limit was gone. It went all the way up to 2048x1536. I was actually able to change the resolution passed it's original limit and the changes were made on the TV. I was finally able to have both my monitors at a 1920x1080 resolution. I even started using a wallpaper specifically made for two monitors with that resolution. In fact, here's a screenshot I took.
http://i.imgur.com/igNCh.jpg
Still confused, I decided to ignore that it magically changed because it magically changed in a good way. Unfortunately, the change didn't last. I had to restart my computer and when it finished booting up, the resolution limit was back. And it went from saying "Generic PnP Monitor" (Which is how it was listed before I restarted my computer and before the resolution limit disappeared) to "Sanyo LCD" (Which is the TV brand). I'm curious is to how this is possible. Is there something I may have done to remove this limit? Is there something I can do again to remove it? As far as I'm concerned, I didn't do anything in particular to display settings or anything that may have caused this.
It must be a problem with the driver. Resolution limits usually appear when one doesn't have the right driver installed and is using a generic one. There's also the inverted scenario where you can set a resolution that's actually not supported. In that case the screen usually stays black (hence that 15 second waiting thing in Windows when you change the resolution). The latter problem can happen in the graphic card driver doesn't work right or it there is none. Try updating your graphic card driver and see if there is a special driver for your monitor around.
After doing some intense googling, I didn't find any drivers (yet) but I did figure out that nVidia can great custom resolutions on your currently hooked up monitors. I was able to create my 1920x1080 for my TV and add it to the list of available resolutions. Though I'm still curious as to how I got the TV to lift the resolution limit in the first place Huh, oh well. Not sure if finding the drivers would be needed now, think I should still look for them?
If it works, don't fix it.