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#1
HDMI port unreliable
I am at my wits end trying to figure this out; maybe I'm just not finding the right search terms; or maybe I'm overlooking an obvious troubleshooting step. It seems to be a Windows problem and I won't be surprised to learn it's "smack my forehead" simple.
My laptop, running Win10, was connected for years to my TV via HDMI and correctly displayed 1080-60.
I was forced to reinstall Win10 (20H2 - Version 19042.867) from scratch and since then the HDMI has been bad. It will briefly display correctly if I freshly install the driver but any slight upset (maybe just click an icon) and the HDMI drops and can't be brought back except by uninstall driver, reboot. It does seem to be reliable when I use it into a 720 display, even when I then force it to output 1080p (the display down converts it). Likewise if I boot to Linux, the HDMI works completely correctly and reliably, using the same display, cable and, of course, the same computer.
BTW, I can run VGA at 1080 perfectly fine even when the HDMI has quit. The TV (same HDMI port) also works fine at 1080p from a different computer that only uses Linux.
[I have tried both Windows native and Intel HD drivers, as well as tried the og drivers (Win8.1))
Late Development: I have another laptop (different brand) running the same Win10 version which is acting exactly the same. (It upgraded itself to 20H2 - same ver. before I checked to see if it still worked)