The hdmi_* runes in config.txt are no longer applicable as Bookworm has switched to using the kernel drivers for displays.
As you can SSH in, "kmsprint" will tell you currently active outputs, and "kmsprint -m" will tell you the modes that the display device advertises in the EDID.
If it reports disconnected, then check the state of the hotplug line via "cat /sys/kernel/debug/dri/1/hdmi*_regs | grep HOTPLUG. The it should report 0x00000001 if connected, or 0x00000000 if not. If no hotplug, then check your cables, or add "vc4.force_hotplug " to the start of the line in /boot/firmware/cmdline.txt (NB NOT config.txt).
As you can SSH in, "kmsprint" will tell you currently active outputs, and "kmsprint -m" will tell you the modes that the display device advertises in the EDID.
If it reports disconnected, then check the state of the hotplug line via "cat /sys/kernel/debug/dri/1/hdmi*_regs | grep HOTPLUG. The it should report 0x00000001 if connected, or 0x00000000 if not. If no hotplug, then check your cables, or add "vc4.force_hotplug " to the start of the line in /boot/firmware/cmdline.txt (NB NOT config.txt).
Statistics: Posted by 6by9 — Mon Jul 08, 2024 12:01 pm