My setup
CPU: Intel Pentium G3240
GPU: NVIDIA GeForce GTX 650 (w/o UEFI)
LibreELEC: Generic last stable (installed in UEFI-CSM mode because GPU doesn't support UEFI)
TV: Samsung PS42C450B1W (or something close, not sure, will check tomorrow, max resolution 1920x1080@60Hz)
After installing noticed that I have wrong ratio, everything is fine in horizontal axis but short in vertical. In TV settings set Be the size of screen, in Kodi 1920x1080 and it looks like 1024x768. What settings may help me and where to looking for a problem? Already found that problem may be in old HDMI cable and maybe I should buy new. Anyway looking for any solution.