The pc is conected to a Samsung TV (UA65HU8500WXXY) via a Yamaha RXV-777 AV Receiver using HDMI. Both the TV and the Receiver continue to report 4k when switching the pc back from 4k to 1080. When I first tried 4k (4096) the display looked great however it flickered full black screen every now and then but got gradualy worse. Now its a constant flicker whenever 4k is applied. Now when trying to change back to 1080 windows reports 'Your display settings cannot be saved. Please try another combination if settings' the only way I have found to recover is to do a restor. the AMD driver is 21.19.384.0 I have also tried an older driver with no luck.
Fractal Design Define R5 Mid Tower Case - Titanium
Intel Core i5 6500 Quad Core LGA 1151 3.2 GHz CPU Processor ASUS Z170-AR Intel LGA 1151 Motherboard Corsair Vengeance LPX 16GB (2x 8GB) Memory Black 2666MHz DDR4 CMK16GX4M2A2666C16 MSI AMD Radeon RX 480 Gaming X 4GB Video Card Thermaltake Toughpower GOLD 550W Modular Power Supply Seagate ST4000DX001 4TB Desktop SSHD 3.5” Hybrid SATA3 Hard Drive Samsung 750 EVO 250GB 2.5" SATA SSD MZ-750250BW Windows 10 Home 64-bit OEM DVD
Connecting a 1080p monitor to a Display Port forces the HDMI to 1080 but display settings still will not save and once the DP is disconnected HDMI reverts back to 4k. (the 4k output has degraded from the flash every couple of minutes to constant flashing (blank screen and coloured horizontal lines)
Just tried the following, (I didn't think to try it earlier due to the fact that display settings fails to save, I assumed that the problem was internal to the pc):
1. removed HDMI (tv-receiver) and connected it to directly from tv to PC. This resulted in no image at all after the BIOS splash screen.
2. Connected DELL monitor to display-port also no image.
3. Disconnected HDMI (tv-pc) image immediately appears on monitor.
4. reconnected HDMI (tv-receiver-pc) image appeared on tv.
Conclusion PC and TV incompatibility???
Any other suggestions, remedies would be greatly appreciated. I would really love to utilise the 4k capability of both the pc and tv.