Troubleshooting • Re: Audio and CEC issue/KMS vs FKMS

Code:

$ 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# 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]

Code:

$ cat /boot/firmware/cmdline.txt console=serial0,115200 console=tty1 root=PARTUUID=321eb9ed-02 rootfstype=ext4 fsck.repair=yes rootwait cfg80211.ieee80211_regdom=GB

Code:

$ aplay -l**** List of PLAYBACK Hardware Devices ****card 0: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]  Subdevices: 8/8  Subdevice #0: subdevice #0  Subdevice #1: subdevice #1  Subdevice #2: subdevice #2  Subdevice #3: subdevice #3  Subdevice #4: subdevice #4  Subdevice #5: subdevice #5  Subdevice #6: subdevice #6  Subdevice #7: subdevice #7card 1: vc4hdmi [vc4-hdmi], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]  Subdevices: 1/1  Subdevice #0: subdevice #0

Code:

$ aplay -Lnull    Discard all samples (playback) or generate zero samples (capture)defaultoutputhw:CARD=Headphones,DEV=0    bcm2835 Headphones, bcm2835 Headphones    Direct hardware device without any conversionsplughw:CARD=Headphones,DEV=0    bcm2835 Headphones, bcm2835 Headphones    Hardware device with all software conversionssysdefault:CARD=Headphones    bcm2835 Headphones, bcm2835 Headphones    Default Audio Devicedmix:CARD=Headphones,DEV=0    bcm2835 Headphones, bcm2835 Headphones    Direct sample mixing devicehw:CARD=vc4hdmi,DEV=0    vc4-hdmi, MAI PCM i2s-hifi-0    Direct hardware device without any conversionsplughw:CARD=vc4hdmi,DEV=0    vc4-hdmi, MAI PCM i2s-hifi-0    Hardware device with all software conversionssysdefault:CARD=vc4hdmi    vc4-hdmi, MAI PCM i2s-hifi-0    Default Audio Devicehdmi:CARD=vc4hdmi,DEV=0    vc4-hdmi, MAI PCM i2s-hifi-0    HDMI Audio Outputdmix:CARD=vc4hdmi,DEV=0    vc4-hdmi, MAI PCM i2s-hifi-0    Direct sample mixing device

Code:

$ speaker-testspeaker-test 1.2.8Playback device is defaultStream parameters are 48000Hz, S16_LE, 1 channelsUsing 16 octaves of pink noiseSample format not available for playback: Invalid argumentSetting of hwparams failed: Invalid argument