pi@raspberrypi:~ $ dmesg
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 5.4.51-v7l+ (dom@buildbot) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1333 SMP Mon Aug 10 16:51:40 BST 2020
[    0.000000] CPU: ARMv7 Processor [410fd083] revision 3 (ARMv7), cr=30c5383d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[    0.000000] OF: fdt: Machine model: Raspberry Pi 4 Model B Rev 1.2
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] Reserved memory: created CMA memory pool at 0x000000001ec00000, size 256 MiB
[    0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[    0.000000] On node 0 totalpages: 1012736
[    0.000000]   DMA zone: 2304 pages used for memmap
[    0.000000]   DMA zone: 0 pages reserved
[    0.000000]   DMA zone: 196608 pages, LIFO batch:63
[    0.000000]   HighMem zone: 816128 pages, LIFO batch:63
[    0.000000] percpu: Embedded 20 pages/cpu s49856 r8192 d23872 u81920
[    0.000000] pcpu-alloc: s49856 r8192 d23872 u81920 alloc=20*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 1010432
[    0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1  smsc95xx.macaddr=DC:A6:32:A6:B3:C3 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  console=tty1 root=PARTUUID=50efcbb2-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] software IO TLB: mapped [mem 0x17cc0000-0x1bcc0000] (64MB)
[    0.000000] Memory: 3655620K/4050944K available (10240K kernel code, 725K rwdata, 2740K rodata, 2048K init, 853K bss, 133180K reserved, 262144K cma-reserved, 3264512K highmem)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] ftrace: allocating 30051 entries in 59 pages
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] GIC: Using split EOI/Deactivate mode
[    0.000000] random: get_random_bytes called from start_kernel+0x340/0x518 with crng_init=0
[    0.000007] sched_clock: 32 bits at 1000kHz, resolution 1000ns, wraps every 2147483647500ns
[    0.000030] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns
[    0.000110] bcm2835: system timer (irq = 17)
[    0.000777] arch_timer: cp15 timer(s) running at 54.00MHz (phys).
[    0.000796] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0xc743ce346, max_idle_ns: 440795203123 ns
[    0.000816] sched_clock: 56 bits at 54MHz, resolution 18ns, wraps every 4398046511102ns
[    0.000832] Switching to timer-based delay loop, resolution 18ns
[    0.001073] Console: colour dummy device 80x30
[    0.001563] printk: console [tty1] enabled
[    0.001623] Calibrating delay loop (skipped), value calculated using timer frequency.. 108.00 BogoMIPS (lpj=540000)
[    0.001664] pid_max: default: 32768 minimum: 301
[    0.001989] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
[    0.002029] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
[    0.003203] Disabling memory control group subsystem
[    0.003318] CPU: Testing write buffer coherency: ok
[    0.003802] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.004647] Setting up static identity map for 0x200000 - 0x20003c
[    0.004849] rcu: Hierarchical SRCU implementation.
[    0.005483] smp: Bringing up secondary CPUs ...
[    0.006629] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.007887] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[    0.009097] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[    0.009239] smp: Brought up 1 node, 4 CPUs
[    0.009307] SMP: Total of 4 processors activated (432.00 BogoMIPS).
[    0.009333] CPU: All CPU(s) started in HYP mode.
[    0.009355] CPU: Virtualization extensions available.
[    0.010134] devtmpfs: initialized
[    0.023001] VFP support v0.3: implementor 41 architecture 3 part 40 variant 8 rev 0
[    0.023272] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.023319] futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
[    0.031062] pinctrl core: initialized pinctrl subsystem
[    0.032096] NET: Registered protocol family 16
[    0.035651] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[    0.037271] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[    0.037305] hw-breakpoint: maximum watchpoint size is 8 bytes.
[    0.037639] Serial: AMBA PL011 UART driver
[    0.041023] bcm2835-mbox fe00b880.mailbox: mailbox enabled
[    0.060887] raspberrypi-firmware soc:firmware: Attached to firmware from 2020-08-19 17:38, variant start
[    0.070870] raspberrypi-firmware soc:firmware: Firmware hash is e90cba19a98a0d1f2ef086b9cafcbca00778f094
[    0.124159] bcm2835-dma fe007000.dma: DMA legacy API manager, dmachans=0x1
[    0.128564] vgaarb: loaded
[    0.129046] SCSI subsystem initialized
[    0.129289] usbcore: registered new interface driver usbfs
[    0.129359] usbcore: registered new interface driver hub
[    0.129500] usbcore: registered new device driver usb
[    0.130984] clocksource: Switched to clocksource arch_sys_counter
[    0.881336] VFS: Disk quotas dquot_6.6.0
[    0.881456] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    0.881623] FS-Cache: Loaded
[    0.881824] CacheFiles: Loaded
[    0.882629] simple-framebuffer: probe of 0.framebuffer failed with error -12
[    0.892547] thermal_sys: Registered thermal governor 'step_wise'
[    0.892923] NET: Registered protocol family 2
[    0.893650] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[    0.893700] TCP established hash table entries: 8192 (order: 3, 32768 bytes, linear)
[    0.893793] TCP bind hash table entries: 8192 (order: 4, 65536 bytes, linear)
[    0.893881] TCP: Hash tables configured (established 8192 bind 8192)
[    0.894037] UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
[    0.894087] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
[    0.894348] NET: Registered protocol family 1
[    0.895050] RPC: Registered named UNIX socket transport module.
[    0.895078] RPC: Registered udp transport module.
[    0.895102] RPC: Registered tcp transport module.
[    0.895126] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.895159] PCI: CLS 0 bytes, default 64
[    0.896897] hw perfevents: enabled with armv7_cortex_a15 PMU driver, 7 counters available
[    0.899041] Initialise system trusted keyrings
[    0.899266] workingset: timestamp_bits=14 max_order=20 bucket_order=6
[    0.909866] FS-Cache: Netfs 'nfs' registered for caching
[    0.910572] NFS: Registering the id_resolver key type
[    0.910618] Key type id_resolver registered
[    0.910643] Key type id_legacy registered
[    0.910677] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.911786] Key type asymmetric registered
[    0.911814] Asymmetric key parser 'x509' registered
[    0.911994] bounce: pool size: 64 pages
[    0.912047] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[    0.912288] io scheduler mq-deadline registered
[    0.912315] io scheduler kyber registered
[    0.916053] brcm-pcie fd500000.pcie: host bridge /scb/pcie@7d500000 ranges:
[    0.916095] brcm-pcie fd500000.pcie:   No bus range found for /scb/pcie@7d500000, using [bus 00-ff]
[    0.916180] brcm-pcie fd500000.pcie:      MEM 0x0600000000..0x0603ffffff -> 0x00f8000000
[    0.916263] brcm-pcie fd500000.pcie:   IB MEM 0x0000000000..0x00bfffffff -> 0x0000000000
[    0.973103] brcm-pcie fd500000.pcie: link up, 5 GT/s x1 (SSC)
[    0.973410] brcm-pcie fd500000.pcie: PCI host bridge to bus 0000:00
[    0.973444] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.973476] pci_bus 0000:00: root bus resource [mem 0x600000000-0x603ffffff] (bus address [0xf8000000-0xfbffffff])
[    0.973552] pci 0000:00:00.0: [14e4:2711] type 01 class 0x060400
[    0.973801] pci 0000:00:00.0: PME# supported from D0 D3hot
[    0.977178] PCI: bus0: Fast back to back transfers disabled
[    0.977422] pci 0000:01:00.0: [1106:3483] type 00 class 0x0c0330
[    0.977581] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x00000fff 64bit]
[    0.978013] pci 0000:01:00.0: PME# supported from D0 D3cold
[    0.981415] PCI: bus1: Fast back to back transfers disabled
[    0.981487] pci 0000:00:00.0: BAR 8: assigned [mem 0x600000000-0x6000fffff]
[    0.981525] pci 0000:01:00.0: BAR 0: assigned [mem 0x600000000-0x600000fff 64bit]
[    0.981622] pci 0000:00:00.0: PCI bridge to [bus 01]
[    0.981658] pci 0000:00:00.0:   bridge window [mem 0x600000000-0x6000fffff]
[    0.981964] pcieport 0000:00:00.0: enabling device (0140 -> 0142)
[    0.982195] pcieport 0000:00:00.0: PME: Signaling with IRQ 56
[    0.982576] pcieport 0000:00:00.0: AER: enabled with IRQ 56
[    0.982938] pci 0000:01:00.0: enabling device (0140 -> 0142)
[    0.989598] iproc-rng200 fe104000.rng: hwrng registered
[    0.989934] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
[    0.990602] vc-sm: Videocore shared memory driver
[    0.991188] gpiomem-bcm2835 fe200000.gpiomem: Initialised: Registers at 0xfe200000
[    1.002819] brd: module loaded
[    1.014673] loop: module loaded
[    1.016018] Loading iSCSI transport class v2.0-870.
[    1.017961] libphy: Fixed MDIO Bus: probed
[    1.018543] bcmgenet fd580000.ethernet: failed to get enet clock
[    1.018577] bcmgenet fd580000.ethernet: GENET 5.0 EPHY: 0x0000
[    1.018612] bcmgenet fd580000.ethernet: failed to get enet-wol clock
[    1.018646] bcmgenet fd580000.ethernet: failed to get enet-eee clock
[    1.018685] bcmgenet: Skipping UMAC reset
[    1.031066] libphy: bcmgenet MII bus: probed
[    1.121087] unimac-mdio unimac-mdio.-19: Broadcom UniMAC MDIO bus
[    1.122112] usbcore: registered new interface driver r8152
[    1.122192] usbcore: registered new interface driver lan78xx
[    1.122264] usbcore: registered new interface driver smsc95xx
[    1.122689] xhci_hcd 0000:01:00.0: xHCI Host Controller
[    1.122736] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1
[    1.125037] xhci_hcd 0000:01:00.0: hcc params 0x002841eb hci version 0x100 quirks 0x0000001000000890
[    1.126308] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04
[    1.126345] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.126378] usb usb1: Product: xHCI Host Controller
[    1.126404] usb usb1: Manufacturer: Linux 5.4.51-v7l+ xhci-hcd
[    1.126431] usb usb1: SerialNumber: 0000:01:00.0
[    1.127011] hub 1-0:1.0: USB hub found
[    1.127114] hub 1-0:1.0: 1 port detected
[    1.127668] xhci_hcd 0000:01:00.0: xHCI Host Controller
[    1.127708] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 2
[    1.127748] xhci_hcd 0000:01:00.0: Host supports USB 3.0 SuperSpeed
[    1.128274] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.04
[    1.128311] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.128343] usb usb2: Product: xHCI Host Controller
[    1.128369] usb usb2: Manufacturer: Linux 5.4.51-v7l+ xhci-hcd
[    1.128396] usb usb2: SerialNumber: 0000:01:00.0
[    1.128980] hub 2-0:1.0: USB hub found
[    1.129072] hub 2-0:1.0: 4 ports detected
[    1.130491] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[    1.130779] dwc_otg: FIQ enabled
[    1.130791] dwc_otg: NAK holdoff enabled
[    1.130802] dwc_otg: FIQ split-transaction FSM enabled
[    1.130817] Module dwc_common_port init
[    1.131298] usbcore: registered new interface driver uas
[    1.131421] usbcore: registered new interface driver usb-storage
[    1.131621] mousedev: PS/2 mouse device common for all mice
[    1.133682] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
[    1.136149] sdhci: Secure Digital Host Controller Interface driver
[    1.136178] sdhci: Copyright(c) Pierre Ossman
[    1.136753] mmc-bcm2835 fe300000.mmcnr: could not get clk, deferring probe
[    1.137284] sdhci-pltfm: SDHCI platform and OF driver helper
[    1.140952] ledtrig-cpu: registered to indicate activity on CPUs
[    1.141317] hidraw: raw HID events driver (C) Jiri Kosina
[    1.141519] usbcore: registered new interface driver usbhid
[    1.141545] usbhid: USB HID core driver
[    1.142552] vchiq: vchiq_init_state: slot_zero = (ptrval)
[    1.144438] [vc_sm_connected_init]: start
[    1.153370] [vc_sm_connected_init]: end - returning 0
[    1.155392] Initializing XFRM netlink socket
[    1.155442] NET: Registered protocol family 17
[    1.155557] Key type dns_resolver registered
[    1.155916] Registering SWP/SWPB emulation handler
[    1.156249] registered taskstats version 1
[    1.156281] Loading compiled-in X.509 certificates
[    1.156767] Key type ._fscrypt registered
[    1.156793] Key type .fscrypt registered
[    1.166699] uart-pl011 fe201000.serial: cts_event_workaround enabled
[    1.166784] fe201000.serial: ttyAMA0 at MMIO 0xfe201000 (irq = 29, base_baud = 0) is a PL011 rev2
[    1.172685] bcm2835-power bcm2835-power: Broadcom BCM2835 power domains driver
[    1.173605] mmc-bcm2835 fe300000.mmcnr: mmc_debug:0 mmc_debug2:0
[    1.173635] mmc-bcm2835 fe300000.mmcnr: DMA channel allocated
[    1.224015] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    1.225670] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    1.227320] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    1.230292] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    1.231997] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    1.239487] mmc0: SDHCI controller on fe340000.emmc2 [fe340000.emmc2] using ADMA
[    1.242381] of_cfs_init
[    1.242635] of_cfs_init: OK
[    1.243738] Waiting for root device PARTUUID=50efcbb2-02...
[    1.277600] random: fast init done
[    1.299051] mmc1: new high speed SDIO card at address 0001
[    1.352499] mmc0: new ultra high speed DDR50 SDHC card at address 59b4
[    1.353386] mmcblk0: mmc0:59b4 5cMJR 29.9 GiB
[    1.355122]  mmcblk0: p1 p2
[    1.362872] EXT4-fs (mmcblk0p2): INFO: recovery required on readonly filesystem
[    1.362911] EXT4-fs (mmcblk0p2): write access will be enabled during recovery
[    1.491790] usb 2-2: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[    1.529780] usb 2-2: New USB device found, idVendor=1bcf, idProduct=2c99, bcdDevice= 2.00
[    1.529819] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    1.529849] usb 2-2: Product: ezcap U3 capture
[    1.529876] usb 2-2: Manufacturer: VXIS Inc
[    1.586298] EXT4-fs (mmcblk0p2): recovery complete
[    1.587676] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    1.587767] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[    1.592424] devtmpfs: mounted
[    1.600303] Freeing unused kernel memory: 2048K
[    1.600601] Run /sbin/init as init process
[    1.671042] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[    1.853884] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.21
[    1.853927] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    1.853958] usb 1-1: Product: USB2.0 Hub
[    1.855837] hub 1-1:1.0: USB hub found
[    1.856149] hub 1-1:1.0: 4 ports detected
[    1.969432] systemd[1]: System time before build time, advancing clock.
[    2.062551] NET: Registered protocol family 10
[    2.063804] Segment Routing with IPv6
[    2.087902] systemd[1]: systemd 241 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid)
[    2.088702] systemd[1]: Detected architecture arm.
[    2.145307] systemd[1]: Set hostname to <raspberrypi>.
[    2.181051] usb 1-1.4: new full-speed USB device number 3 using xhci_hcd
[    2.321270] usb 1-1.4: New USB device found, idVendor=2341, idProduct=8036, bcdDevice= 1.00
[    2.321317] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    2.321352] usb 1-1.4: Product: Arduino Leonardo
[    2.321380] usb 1-1.4: Manufacturer: Arduino LLC
[    2.703827] random: systemd: uninitialized urandom read (16 bytes read)
[    2.713381] random: systemd: uninitialized urandom read (16 bytes read)
[    2.716467] systemd[1]: Created slice system-getty.slice.
[    2.717172] random: systemd: uninitialized urandom read (16 bytes read)
[    2.717853] systemd[1]: Listening on Journal Socket (/dev/log).
[    2.718671] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[    2.719782] systemd[1]: Listening on udev Control Socket.
[    2.724993] systemd[1]: Listening on Syslog Socket.
[    2.725554] systemd[1]: Reached target Swap.
[    2.726314] systemd[1]: Listening on initctl Compatibility Named Pipe.
[    3.309312] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[    3.411659] systemd-journald[106]: Received request to flush runtime journal from PID 1
[    3.872880] rpivid-mem feb00000.hevc-decoder: rpivid-hevcmem initialised: Registers at 0xfeb00000 length 0x00010000
[    3.873292] rpivid-mem feb10000.rpivid-local-intc: rpivid-intcmem initialised: Registers at 0xfeb10000 length 0x00001000
[    3.873705] rpivid-mem feb20000.h264-decoder: rpivid-h264mem initialised: Registers at 0xfeb20000 length 0x00010000
[    3.874137] rpivid-mem feb30000.vp9-decoder: rpivid-vp9mem initialised: Registers at 0xfeb30000 length 0x00010000
[    3.939526] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[    3.941688] bcm2835_vc_sm_cma_probe: Videocore shared memory driver
[    3.941708] [vc_sm_connected_init]: start
[    3.947759] [vc_sm_connected_init]: installed successfully
[    4.024261] mc: Linux media interface: v0.10
[    4.051125] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned.
[    4.153389] bcm2835_audio bcm2835_audio: card created with 8 channels
[    4.161514] videodev: Linux video capture interface: v2.00
[    4.221097] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[    4.230677] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[    4.235691] bcm2835_codec: module is from the staging directory, the quality is unknown, you have been warned.
[    4.239172] bcm2835_v4l2: module is from the staging directory, the quality is unknown, you have been warned.
[    4.251266] bcm2835_isp: module is from the staging directory, the quality is unknown, you have been warned.
[    4.272679] bcm2835-codec bcm2835-codec: Device registered as /dev/video10
[    4.272731] bcm2835-codec bcm2835-codec: Loaded V4L2 decode
[    4.300209] bcm2835-codec bcm2835-codec: Device registered as /dev/video11
[    4.300251] bcm2835-codec bcm2835-codec: Loaded V4L2 encode
[    4.308501] bcm2835-isp bcm2835-isp: Device node output[0] registered as /dev/video13
[    4.309024] bcm2835-isp bcm2835-isp: Device node capture[0] registered as /dev/video14
[    4.309411] bcm2835-isp bcm2835-isp: Device node capture[1] registered as /dev/video15
[    4.312546] bcm2835-isp bcm2835-isp: Device node stats[2] registered as /dev/video16
[    4.312573] bcm2835-isp bcm2835-isp: Register output node 0 with media controller
[    4.312593] bcm2835-isp bcm2835-isp: Register capture node 1 with media controller
[    4.312623] bcm2835-isp bcm2835-isp: Register capture node 2 with media controller
[    4.312642] bcm2835-isp bcm2835-isp: Register capture node 3 with media controller
[    4.312870] bcm2835-isp bcm2835-isp: Loaded V4L2 bcm2835-isp
[    4.313349] bcm2835-codec bcm2835-codec: Device registered as /dev/video12
[    4.313384] bcm2835-codec bcm2835-codec: Loaded V4L2 isp
[    4.370248] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[    4.389767] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
[    4.390499] uvcvideo: Failed to query (GET_INFO) UVC control 11 on unit 1: -32 (exp. 1).
[    4.395485] [drm] Initialized v3d 1.0.0 20180419 for fec00000.v3d on minor 0
[    4.396120] usb 2-2: Disable of device-initiated U1 failed.
[    4.396766] usb 2-2: Disable of device-initiated U2 failed.
[    4.409902] uvcvideo 2-2:1.0: Entity type for entity Extension 4 was not initialized!
[    4.409926] uvcvideo 2-2:1.0: Entity type for entity Extension 3 was not initialized!
[    4.409945] uvcvideo 2-2:1.0: Entity type for entity Processing 2 was not initialized!
[    4.409975] uvcvideo 2-2:1.0: Entity type for entity Camera 1 was not initialized!
[    4.410361] input: ezcap U3 capture: ezcap U3 capt as /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-2/2-2:1.0/input/input0
[    4.410646] usbcore: registered new interface driver uvcvideo
[    4.410659] USB Video Class driver (1.1.1)
[    4.450363] cdc_acm 1-1.4:1.0: ttyACM0: USB ACM device
[    4.458271] usbcore: registered new interface driver cdc_acm
[    4.458287] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[    4.543226] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[    4.551125] [drm] No displays found. Consider forcing hotplug if HDMI is attached
[    4.551250] vc4-drm gpu: bound fe600000.firmwarekms (ops vc4_fkms_ops [vc4])
[    4.551272] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    4.551284] [drm] No driver support for vblank timestamp query.
[    4.551295] [drm] Setting vblank_disable_immediate to false because get_vblank_timestamp == NULL
[    4.553777] [drm] Initialized vc4 0.0.0 20140616 for gpu on minor 1
[    4.560334] usb 2-2: Disable of device-initiated U1 failed.
[    4.564789] usb 2-2: Disable of device-initiated U2 failed.
[    4.615231] usb 2-2: 3:1: cannot get freq at ep 0x86
[    4.617045] brcmfmac: F1 signature read @0x18000000=0x15264345
[    4.618069] usb 2-2: Disable of device-initiated U1 failed.
[    4.618803] usb 2-2: Disable of device-initiated U2 failed.
[    4.624916] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[    4.629827] usb 2-2: Warning! Unlikely big volume range (=4096), cval->res is probably wrong.
[    4.629848] usb 2-2: [5] FU [Digital In Capture Volume] ch = 1, val = 0/4096/1
[    4.630687] usbcore: registered new interface driver snd-usb-audio
[    4.631290] usbcore: registered new interface driver brcmfmac
[    4.651491] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt failed with error -2
[    4.892054] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[    4.910215] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Mar 23 2020 02:19:54 version 7.45.206 (r725000 CY) FWID 01-88ee44ea
[    6.603750] random: crng init done
[    6.603768] random: 7 urandom warning(s) missed due to ratelimiting
[    6.717415] 8021q: 802.1Q VLAN Support v1.8
[    6.951113] Adding 102396k swap on /var/swap.  Priority:-2 extents:1 across:102396k SSFS
[    7.229357] bcmgenet: Skipping UMAC reset
[    7.232004] bcmgenet fd580000.ethernet: configuring instance for external RGMII
[    7.232413] bcmgenet fd580000.ethernet eth0: Link is Down
[   12.471229] bcmgenet fd580000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[   12.471274] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
pi@raspberrypi:~ $