I've got a Raspberry Pi connected to a TV that I use as a Kodi media player. I want to be able to reboot that Pi even when the TV is off. To that end, I have captured the EDID to a file and am loading it manually. I am also setting the desired video mode using a VIDEO= entry on the kernel command line, and am using vc4.forcehotplug=1 in an attempt to force the display to come up. Unfortunately this is not working - the Pi behaves as though there is is nothing connected - the vc4.forcehotplug=1 line appears to be ignored:
(Obviously the HDMI output comes up fine if the TV is on).
It used to work fine under Raspberry Pi OS Bookworm, but now under RPiOS Trixie the vc4.forcehotplug=1 parameter is having no effect. Is this parameter no longer supported?
Code:
andrew@tarmachan:~ $ kmsprintConnector 0 (33) HDMI-A-1 (disconnected) Encoder 0 (32) TMDSConnector 1 (42) HDMI-A-2 (disconnected) Encoder 1 (41) TMDSIt used to work fine under Raspberry Pi OS Bookworm, but now under RPiOS Trixie the vc4.forcehotplug=1 parameter is having no effect. Is this parameter no longer supported?
Statistics: Posted by andrum99 — Sat Nov 15, 2025 11:59 am