I'm connecting my RPI4 to an old HDMI display. The display is suspended upside-down, so I need to be able to rotate the screen 180 degrees. My config.txt looks like this:
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# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2009-2014 Stephan Raue ([email protected])
# Copyright (C) 2016-present Team LibreELEC (https://libreelec.tv)
################################################################################
# Bootloader configuration - config.txt
################################################################################
################################################################################
# Memory (System/GPU configuration )
################################################################################
# Default GPU memory split - at least 288M is needed for some 4k HEVC files
gpu_mem=320
################################################################################
# For overclocking and various other settings, see:
# https://www.raspberrypi.org/documentation/configuration/config-txt.md
################################################################################
# Set 'force_turbo=1' to disable dynamic overclocking and enable overclocking always.
force_turbo=0
# Force HDMI even if unplugged or powered off
hdmi_force_hotplug=1
hdmi_ignore_edid=0xa5000080
hdmi_group=2
hdmi_mode=83
display_hdmi_rotate=2
# Doesn't sent initial active source message.
# Avoids bringing CEC (enabled TV) out of standby and channel switch when
# rebooting.
hdmi_ignore_cec_init=1
################################################################################
# End of default configuration
################################################################################
################################################################################
# Include distribution specific config file if it exists.
################################################################################
[all]
include distroconfig.txtAccording to what I've read online, that display_hdmi_rotate flag should rotate the display, but it's being ignored. (I've tried setting it to all different values, as well as having tried the deprecated display_rotate option. No dice.) I noticed that if I comment out the line
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dtoverlay=vc4-fkms-v3din /flash/distroconfig.txt, I'm able to get the display to rotate... but then obviously the OS doesn't boot and just hangs on the splash screen.
I'm using version 9.2.3