I have been trying to optimise our TV viewing options since dumping Sky. It should have been relatively straightforward but somehow I keep getting tangled up in ridiculous things that shouldn’t be problems at all.
The latest is the HDMI display on the pc. I made the huge mistake of updating the drivers on this and since then I haven’t been able to get it to work correctly. The display is an AMD Radeon HDMI card and yes, I probably need to replace it with something that works, but I would like understand more about the issue if possible.
I use an HDMI switch to move between different inputs. This has worked well for years. The switch is programmed into my Harmony remote, which automatically selects the correct input for the device I want, as well as other things. Current devices are an Android box, the TV UHF receiver, a satellite box, a DVR and the PC. There also used to be a Sky decoder, now removed and replaced by the Android box.
When I disassembled things to swap the boxes and make some other changes, the HDMI switch and device displays worked fine. In fact, the Radeon card in the PC has worked perfectly for years. I temporarily connected the PC to a different display (720p Panasonic TV) to do some updates. When I put it back, I could not get my main Sony TV to display the PC on the full screen area. Instead there was a box with black borders. I never had this before.
After some fiddling, I was unable to correct the display so I updated the Radeon drivers from the AMD site. This fixed the problem and the display now fills the screen area correctly.
Unfortunately, it also stuffed my HDMI switch. To be more precise, the switch, which is ‘smart’, no longer detects the display from the PC and skips over it. The switch is designed to ignore inputs with no signal so it only selects from active ones. What happens is that the display from the PC is fine when the PC boots, but if I then select another input, I can’t get back to the PC display. If I use the remote to operate the HDMI switch, it skips past the PC. I can override that by manually operating the switch, and then it works fine. I can also get the display back by briefly replugging the HDMI cable which I guess reinitialises something.
So the display is still actually there but some signal is missing which informs the switch of that fact. I rolled back the drivers, then uninstalled them completely, along with all the Catalyst crap that came with them, and let the computer just reinstall the basic card drivers that were there in the first place, but I still have the problem. If I switch the display to a different device, the PC HDMI card is no longer seen when I try to switch back.
When this happens, nothing I can do seems to fix it other than what I have already mentioned. Replugging the cable works. So does manually setting the switch. But nothing I can do from the remote or the keyboard makes any difference.
Is there a solution to this? I have searched for similar problems and there are lots of people complaining about black screens with Radeon cards and AMD seems fairly uninterested. I feel there has to be some simple fix for this because it worked perfectly before and nothing has changed except some software. Surely there is some way of getting back to where I was? If anyone knows, I would be grateful to hear it.