Troubleshooting • Extra arguments in /proc/cmdline disabling HDMI sound

Code:

tony@raspberrypi:/ $ cat /proc/cmdlinecoherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_headphones=0 cgroup_disable=memory snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_hdmi=0  vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  video=HDMI-A-1:1920x1080M@60 console=tty1 root=PARTUUID=7d4510b1-02 rootfstype=ext4 fsck.repair=yes rootwaittony@raspberrypi:/ $ hostnamectl | grep "Operating System"Operating System: Debian GNU/Linux 12 (bookworm)tony@raspberrypi:/ $ cat /boot/firmware/cmdline.txtvideo=HDMI-A-1:1920x1080M@60 console=tty1 root=PARTUUID=7d4510b1-02 rootfstype=ext4 fsck.repair=yes rootwaittony@raspberrypi:/ $ cat /boot/firmware/config.txt# For more options and information see# http://rptl.io/configtxt# Some settings may impact device functionality. See link above for details# Uncomment some or all of these to enable the optional hardware interfaces#dtparam=i2c_arm=on#dtparam=i2s=on#dtparam=spi=on# Enable audio (loads snd_bcm2835)dtparam=audio=on# Additional overlays and parameters are documented# /boot/firmware/overlays/README# Automatically load overlays for detected camerascamera_auto_detect=1# Automatically load overlays for detected DSI displaysdisplay_auto_detect=1# Automatically load initramfs files, if foundauto_initramfs=1# Enable DRM VC4 V3D driverdtoverlay=vc4-kms-v3dmax_framebuffers=2# Don't have the firmware create an initial video= setting in cmdline.txt.# Use the kernel's default instead.disable_fw_kms_setup=1# Run in 64-bit modearm_64bit=1# Disable compensation for displays with overscandisable_overscan=1# Run as fast as firmware / board allowsarm_boost=1[cm4]# Enable host mode on the 2711 built-in XHCI USB controller.# This line should be removed if the legacy DWC2 controller is required# (e.g. for USB device mode) or if USB support is not required.otg_mode=1[cm5]dtoverlay=dwc2,dr_mode=host[all]#hdmi_group=2#hdmi_mode=82#hdmi_tv_resolution=1080p#hdmi_ignore_edid=1#hdmi_force_mode=1