[arch-general] External monitors are no longer detected (Intel graphics)

[L. Rose]

>> There are *some* issues with intel gpu's and recent kernels. I can't use
>> multiple monitors in most of the cases as the i915 module misinterpret
>> possible resolutions, for example.
Also, I remember some issue with external monitors on this list not long 
ago: 
https://lists.archlinux.org/pipermail/arch-general/2019-June/046539.html 
Even if the OP suspected a faulty HDMI port, this might still be related.