Comment # 36 on bug 1193599 from Takashi Iwai

(In reply to Daike Yu from comment #32)
> So I suspect there's two separate issue exists here:
> 
> 1. nvidia driver is not handling HDMI hot plug correctly (therefore we need
> to plug in HDMI cable before boot to get HDMI working with discrete GPU)
> 2. i915 have some problem with LSPCON (so HDMI output with iGPU is not
> working at all).
> 
> Hope this info helps, and please let me know if there's anything else I can
> help with (debug log/testing etc).

Thanks for the detailed analysis!

Adding Stefan to Cc, as this sounds more like a Intel/Nvidia combo case (being
always a headache).