Headless Operation

I have just begun to use LibreElec as a home music server, running on a Raspi 3 with a USB hard disk. Although a newbie with the Raspi, I was able to set up and configure LibreElec very easily using a normal keyboard and monitor, with the display set to 1920x1080 50p. The server runs perfectly, just as I hoped. However, the server normally runs headless, and I want to use VNC viewer from another PC to do any maintenance that may be required. But when I connect in this way, the LibreElec menu system defaults to 720 60p, in a small window, and this makes the text very difficult to read. The display resolution settings are all greyed out, so I am unable to change them. Is there any way to change these defaults? I am unsure as to whether this is in fact a LibreElec issue, or is a function of the Raspberry PI, but I would appreciate any advice you can give me.

Thanks, IanS

Hi. Thanks for the reply. Just so I'm clear, is that the Raspi's config file, which is somewhere on the SD card?

Thanks for all the replies. I have now resolved the issue, though it wasn't quite so straightforward. Adding the "hdmi_force_hotplug=1" line to the config file did activate the LibreElec resolution setting. However, although I could change the setting (I wanted 1920x1080), and I could see the display resolution change, when prompted to accept the new resolution, the display immediately dropped back to the oriiginal. I could find no way for it to keep the new, higher resolution. So I changed the config file again, adding additional lines for "hdmi_group=1" and "hdmi_mode = 31" (for 1080 50p).

So problem solved, plus I learned a little more about the Raspi along the way!