pi@soundsystem:~ $ dmesg
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.14.98-v7+ (dom@dom-XPS-13-9370) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1200 SMP Tue Feb 12 20:27:48 GMT 2019
[    0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: Raspberry Pi 3 Model B Rev 1.2
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] cma: Reserved 8 MiB at 0x37800000
[    0.000000] On node 0 totalpages: 229376
[    0.000000] free_area_init_node: node 0, pgdat 80c85780, node_mem_map b7014000
[    0.000000]   Normal zone: 2016 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 229376 pages, LIFO batch:31
[    0.000000] percpu: Embedded 17 pages/cpu @b6fbd000 s38720 r8192 d22720 u69632
[    0.000000] pcpu-alloc: s38720 r8192 d22720 u69632 alloc=17*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 227360
[    0.000000] Kernel command line: 8250.nr_uarts=0 bcm2708_fb.fbwidth=720 bcm2708_fb.fbheight=480 bcm2708_fb.fbswap=1 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=PARTUUID=ee397c53-02 rootfstype=ext4 elevator=deadline fsck.repair=yes net.ifnames=0 biosdevname=0 avoid_safe_mode=1 rootwait quiet
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Memory: 887452K/917504K available (7168K kernel code, 577K rwdata, 2080K rodata, 1024K init, 698K bss, 21860K reserved, 8192K cma-reserved)
[    0.000000] Virtual kernel memory layout:
                   vector  : 0xffff0000 - 0xffff1000   (   4 kB)
                   fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
                   vmalloc : 0xb8800000 - 0xff800000   (1136 MB)
                   lowmem  : 0x80000000 - 0xb8000000   ( 896 MB)
                   modules : 0x7f000000 - 0x80000000   (  16 MB)
                     .text : 0x80008000 - 0x80800000   (8160 kB)
                     .init : 0x80b00000 - 0x80c00000   (1024 kB)
                     .data : 0x80c00000 - 0x80c906d4   ( 578 kB)
                      .bss : 0x80c97ef8 - 0x80d468f0   ( 699 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] ftrace: allocating 25298 entries in 75 pages
[    0.000000] Hierarchical RCU implementation.
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] arch_timer: cp15 timer(s) running at 19.20MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
[    0.000007] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
[    0.000018] Switching to timer-based delay loop, resolution 52ns
[    0.000266] Console: colour dummy device 80x30
[    0.000285] console [tty1] enabled
[    0.000309] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)
[    0.000324] pid_max: default: 32768 minimum: 301
[    0.000645] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000660] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.001597] Disabling memory control group subsystem
[    0.001671] CPU: Testing write buffer coherency: ok
[    0.002089] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.002490] Setting up static identity map for 0x100000 - 0x10003c
[    0.002615] Hierarchical SRCU implementation.
[    0.003291] smp: Bringing up secondary CPUs ...
[    0.004072] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.004915] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[    0.005742] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[    0.005847] smp: Brought up 1 node, 4 CPUs
[    0.005858] SMP: Total of 4 processors activated (153.60 BogoMIPS).
[    0.005863] CPU: All CPU(s) started in HYP mode.
[    0.005867] CPU: Virtualization extensions available.
[    0.006776] devtmpfs: initialized
[    0.017222] random: get_random_u32 called from bucket_table_alloc+0xfc/0x24c with crng_init=0
[    0.018024] VFP support v0.3: implementor 41 architecture 3 part 40 variant 3 rev 4
[    0.018247] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.018264] futex hash table entries: 1024 (order: 4, 65536 bytes)
[    0.018822] pinctrl core: initialized pinctrl subsystem
[    0.019574] NET: Registered protocol family 16
[    0.022362] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[    0.027405] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[    0.027412] hw-breakpoint: maximum watchpoint size is 8 bytes.
[    0.027621] Serial: AMBA PL011 UART driver
[    0.029285] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
[    0.029752] uart-pl011 3f201000.serial: could not find pctldev for node /soc/gpio@7e200000/uart0_pins, deferring probe
[    0.061766] bcm2835-dma 3f007000.dma: DMA legacy API manager at b8813000, dmachans=0x1
[    0.063212] SCSI subsystem initialized
[    0.063441] usbcore: registered new interface driver usbfs
[    0.063492] usbcore: registered new interface driver hub
[    0.063577] usbcore: registered new device driver usb
[    0.070088] raspberrypi-firmware soc:firmware: Attached to firmware from 2019-02-12 19:46
[    0.071555] clocksource: Switched to clocksource arch_sys_counter
[    0.148339] VFS: Disk quotas dquot_6.6.0
[    0.148421] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    0.148606] FS-Cache: Loaded
[    0.148792] CacheFiles: Loaded
[    0.156846] NET: Registered protocol family 2
[    0.157567] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[    0.157676] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[    0.157861] TCP: Hash tables configured (established 8192 bind 8192)
[    0.157990] UDP hash table entries: 512 (order: 2, 16384 bytes)
[    0.158034] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[    0.158262] NET: Registered protocol family 1
[    0.158722] RPC: Registered named UNIX socket transport module.
[    0.158728] RPC: Registered udp transport module.
[    0.158733] RPC: Registered tcp transport module.
[    0.158738] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.160431] hw perfevents: enabled with armv7_cortex_a7 PMU driver, 7 counters available
[    0.163210] workingset: timestamp_bits=14 max_order=18 bucket_order=4
[    0.171358] FS-Cache: Netfs 'nfs' registered for caching
[    0.171999] NFS: Registering the id_resolver key type
[    0.172032] Key type id_resolver registered
[    0.172038] Key type id_legacy registered
[    0.172054] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.173995] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[    0.174128] io scheduler noop registered
[    0.174135] io scheduler deadline registered (default)
[    0.174305] io scheduler cfq registered
[    0.174312] io scheduler mq-deadline registered
[    0.174318] io scheduler kyber registered
[    0.177068] BCM2708FB: allocated DMA memory f7910000
[    0.177096] BCM2708FB: allocated DMA channel 0 @ b8813000
[    0.187559] Console: switching to colour frame buffer device 90x30
[    0.194766] bcm2835-rng 3f104000.rng: hwrng registered
[    0.194900] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
[    0.195343] vc-sm: Videocore shared memory driver
[    0.195619] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[    0.205238] brd: module loaded
[    0.214011] loop: module loaded
[    0.214024] Loading iSCSI transport class v2.0-870.
[    0.214669] libphy: Fixed MDIO Bus: probed
[    0.214767] usbcore: registered new interface driver lan78xx
[    0.214821] usbcore: registered new interface driver smsc95xx
[    0.214836] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[    0.242719] dwc_otg 3f980000.usb: base=0xf0980000
[    0.442923] Core Release: 2.80a
[    0.442931] Setting default values for core params
[    0.442961] Finished setting default values for core params
[    0.643205] Using Buffer DMA mode
[    0.643212] Periodic Transfer Interrupt Enhancement - disabled
[    0.643217] Multiprocessor Interrupt Enhancement - disabled
[    0.643223] OTG VER PARAM: 0, OTG VER FLAG: 0
[    0.643240] Dedicated Tx FIFOs mode
[    0.643613] WARN::dwc_otg_hcd_init:1046: FIQ DMA bounce buffers: virt = 0xb7904000 dma = 0xf7904000 len=9024
[    0.643639] FIQ FSM acceleration enabled for :
               Non-periodic Split Transactions
               Periodic Split Transactions
               High-Speed Isochronous Endpoints
               Interrupt/Control Split Transaction hack enabled
[    0.643646] dwc_otg: Microframe scheduler enabled
[    0.643692] WARN::hcd_init_fiq:459: FIQ on core 1 at 0x805ed94c
[    0.643703] WARN::hcd_init_fiq:460: FIQ ASM at 0x805edcb4 length 36
[    0.643715] WARN::hcd_init_fiq:486: MPHI regs_base at 0xf0006000
[    0.643764] dwc_otg 3f980000.usb: DWC OTG Controller
[    0.643795] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
[    0.643824] dwc_otg 3f980000.usb: irq 62, io mem 0x00000000
[    0.643871] Init: Port Power? op_state=1
[    0.643878] Init: Power Port (0)
[    0.644078] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    0.644089] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.644097] usb usb1: Product: DWC OTG Controller
[    0.644105] usb usb1: Manufacturer: Linux 4.14.98-v7+ dwc_otg_hcd
[    0.644113] usb usb1: SerialNumber: 3f980000.usb
[    0.644702] hub 1-0:1.0: USB hub found
[    0.644742] hub 1-0:1.0: 1 port detected
[    0.645244] dwc_otg: FIQ enabled
[    0.645249] dwc_otg: NAK holdoff enabled
[    0.645254] dwc_otg: FIQ split-transaction FSM enabled
[    0.645263] Module dwc_common_port init
[    0.645488] usbcore: registered new interface driver usb-storage
[    0.645658] mousedev: PS/2 mouse device common for all mice
[    0.645726] IR NEC protocol handler initialized
[    0.645731] IR RC5(x/sz) protocol handler initialized
[    0.645736] IR RC6 protocol handler initialized
[    0.645741] IR JVC protocol handler initialized
[    0.645746] IR Sony protocol handler initialized
[    0.645751] IR SANYO protocol handler initialized
[    0.645756] IR Sharp protocol handler initialized
[    0.645761] IR MCE Keyboard/mouse protocol handler initialized
[    0.645766] IR XMP protocol handler initialized
[    0.646443] bcm2835-wdt 3f100000.watchdog: Broadcom BCM2835 watchdog timer
[    0.646704] bcm2835-cpufreq: min=600000 max=1200000
[    0.647066] sdhci: Secure Digital Host Controller Interface driver
[    0.647070] sdhci: Copyright(c) Pierre Ossman
[    0.647415] mmc-bcm2835 3f300000.mmc: could not get clk, deferring probe
[    0.647735] sdhost-bcm2835 3f202000.mmc: could not get clk, deferring probe
[    0.647829] sdhci-pltfm: SDHCI platform and OF driver helper
[    0.649251] ledtrig-cpu: registered to indicate activity on CPUs
[    0.649421] hidraw: raw HID events driver (C) Jiri Kosina
[    0.649575] usbcore: registered new interface driver usbhid
[    0.649580] usbhid: USB HID core driver
[    0.650298] vchiq: vchiq_init_state: slot_zero = b7980000, is_master = 0
[    0.651702] [vc_sm_connected_init]: start
[    0.660296] [vc_sm_connected_init]: end - returning 0
[    0.660911] Initializing XFRM netlink socket
[    0.660934] NET: Registered protocol family 17
[    0.661043] Key type dns_resolver registered
[    0.661645] Registering SWP/SWPB emulation handler
[    0.662227] registered taskstats version 1
[    0.668072] uart-pl011 3f201000.serial: cts_event_workaround enabled
[    0.668141] 3f201000.serial: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
[    0.669865] mmc-bcm2835 3f300000.mmc: mmc_debug:0 mmc_debug2:0
[    0.669877] mmc-bcm2835 3f300000.mmc: DMA channel allocated
[    0.722185] sdhost: log_buf @ b7907000 (f7907000)
[    0.759770] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    0.761341] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    0.762899] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    0.765682] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    0.801575] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[    0.802583] of_cfs_init
[    0.802673] of_cfs_init: OK
[    0.803242] Waiting for root device PARTUUID=ee397c53-02...
[    0.843208] random: fast init done
[    0.861720] Indeed it is in host mode hprt0 = 00021501
[    0.942930] mmc1: new high speed SDIO card at address 0001
[    0.961779] mmc0: host does not support reading read-only switch, assuming write-enable
[    0.965412] mmc0: new high speed SDHC card at address aaaa
[    0.965837] mmcblk0: mmc0:aaaa ACLCD 29.7 GiB
[    0.968310]  mmcblk0: p1 p2 p3
[    0.986013] EXT4-fs (mmcblk0p2): INFO: recovery required on readonly filesystem
[    0.986020] EXT4-fs (mmcblk0p2): write access will be enabled during recovery
[    1.071590] usb 1-1: new high-speed USB device number 2 using dwc_otg
[    1.071711] Indeed it is in host mode hprt0 = 00001101
[    1.205374] EXT4-fs (mmcblk0p2): orphan cleanup on readonly fs
[    1.210715] EXT4-fs (mmcblk0p2): 3 orphan inodes deleted
[    1.210722] EXT4-fs (mmcblk0p2): recovery complete
[    1.229359] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    1.229425] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[    1.237307] devtmpfs: mounted
[    1.240745] Freeing unused kernel memory: 1024K
[    1.311872] usb 1-1: New USB device found, idVendor=0424, idProduct=9514
[    1.311885] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    1.312515] hub 1-1:1.0: USB hub found
[    1.312612] hub 1-1:1.0: 5 ports detected
[    1.631608] usb 1-1.1: new high-speed USB device number 3 using dwc_otg
[    1.704208] systemd[1]: System time before build time, advancing clock.
[    1.761886] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00
[    1.761901] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    1.764555] smsc95xx v1.0.6
[    1.825552] NET: Registered protocol family 10
[    1.826570] Segment Routing with IPv6
[    1.845000] ip_tables: (C) 2000-2006 Netfilter Core Team
[    1.855300] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:c5:d2:ac
[    1.864637] random: systemd: uninitialized urandom read (16 bytes read)
[    1.870315] systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[    1.870859] systemd[1]: Detected architecture arm.
[    1.871829] systemd[1]: Set hostname to <soundsystem>.
[    1.905740] random: systemd: uninitialized urandom read (16 bytes read)
[    1.933110] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read)
[    1.951703] usb 1-1.3: new full-speed USB device number 4 using dwc_otg
[    2.089836] usb 1-1.3: New USB device found, idVendor=0d8c, idProduct=013c
[    2.089851] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    2.089860] usb 1-1.3: Product: USB PnP Sound Device
[    2.089869] usb 1-1.3: Manufacturer: C-Media Electronics Inc.
[    2.094478] input: C-Media Electronics Inc.       USB PnP Sound Device as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.3/0003:0D8C:013C.0001/input/input0
[    2.161880] hid-generic 0003:0D8C:013C.0001: input,hidraw0: USB HID v1.00 Device [C-Media Electronics Inc.       USB PnP Sound Device] on usb-3f980000.usb-1.3/input3
[    2.434089] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[    2.434611] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[    2.434921] systemd[1]: Listening on udev Control Socket.
[    2.435171] systemd[1]: Listening on udev Kernel Socket.
[    2.453597] systemd[1]: Listening on Journal Socket.
[    2.453891] systemd[1]: Listening on fsck to fsckd communication Socket.
[    2.454737] systemd[1]: Created slice System Slice.
[    3.123482] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[    3.188951] systemd-journald[94]: Received request to flush runtime journal from PID 1
[    3.781165] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned.
[    3.784466] bcm2835_alsa bcm2835_alsa: card created with 8 channels
[    4.005592] brcmfmac: F1 signature read @0x18000000=0x1541a9a6
[    4.019872] brcmfmac: brcmf_fw_map_chip_to_name: using brcm/brcmfmac43430-sdio.bin for chip 0x00a9a6(43430) rev 0x000001
[    4.020181] usbcore: registered new interface driver brcmfmac
[    4.244815] usbcore: registered new interface driver snd-usb-audio
[    4.297395] random: crng init done
[    4.297411] random: 7 urandom warning(s) missed due to ratelimiting
[    4.312601] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Oct 23 2017 03:55:53 version 7.45.98.38 (r674442 CY) FWID 01-e58d219f
[    4.313496] brcmfmac: brcmf_c_preinit_dcmds: CLM version = API: 12.2 Data: 7.11.15 Compiler: 1.24.2 ClmImport: 1.24.1 Creation: 2014-05-26 10:53:55 Inc Data: 9.10.39 Inc Compiler: 1.29.4 Inc ClmImport: 1.36.3 Creation: 2017-10-23 03:47:14
[    4.417523] brcmfmac: power management disabled
[    5.068825] brcmfmac: power management disabled
[    5.161939] uart-pl011 3f201000.serial: no DMA platform data
[    6.156881] Adding 102396k swap on /var/swap.  Priority:-2 extents:1 across:102396k SSFS
[    7.160440] input: lircd-uinput as /devices/virtual/input/input1
[    7.322834] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[    7.887372] snd_usb_hiface: loading out-of-tree module taints kernel.
[    7.887662] snd_usb_hiface: disagrees about version of symbol kmem_cache_alloc_trace
[    7.887669] snd_usb_hiface: Unknown symbol kmem_cache_alloc_trace (err -22)
[   10.034090] Bluetooth: Core ver 2.22
[   10.034218] NET: Registered protocol family 31
[   10.034224] Bluetooth: HCI device and connection manager initialized
[   10.035300] Bluetooth: HCI socket layer initialized
[   10.035317] Bluetooth: L2CAP socket layer initialized
[   10.035356] Bluetooth: SCO socket layer initialized
[   10.049209] Bluetooth: HCI UART driver ver 2.3
[   10.049218] Bluetooth: HCI UART protocol H4 registered
[   10.049221] Bluetooth: HCI UART protocol Three-wire (H5) registered
[   10.049392] Bluetooth: HCI UART protocol Broadcom registered
[   10.249528] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   10.249539] Bluetooth: BNEP filters: protocol multicast
[   10.249557] Bluetooth: BNEP socket layer initialized
[   67.320109] fuse init (API version 7.26)