Hi,
I am getting the following error on my Rpi3 + Navio2 setup. It is similar to another post from a little over a week ago, but the solution was never posted.
/sys/class/pwm/ directory is empty
Output of the commands that might help (from the other post)
pi@navio:~ $ uname -a
Linux navio 4.4.50-v7+ #970 SMP Mon Feb 20 19:18:29 GMT 2017 armv7l GNU/Linux
pi@navio:~ $ sudo vcdbg log msg 2>&1 | grep -C5 rcio
001581.450: dtparam: spi=on
001646.774: Loaded overlay 'spi0-2cs'
001714.185: Loaded overlay 'spi1-1cs'
001714.200: dtparam: cs0_pin=16
001714.998: dtparam: cs0_spidev=disabled
001772.802: Loaded overlay 'rcio'
001814.269: Loaded overlay 'navio-rgb'
001814.303: dtparam: i2c1=on
001825.335: dtparam: i2c1_baudrate=1000000
001920.950: dtparam: arm_freq=1200000000
001968.304: dtparam: core_freq=400000000
pi@navio:~ $ dmesg | grep rcio
pi@navio:~ $ ls /boot/overlays/rcio*
/boot/overlays/rcio.dtbo /boot/overlays/rcio-overlay.dtb
pi@navio:~ $ lsmod
Module Size Used by
bnep 10340 2
bluetooth 326105 5 bnep
cpufreq_stats 3463 0
evdev 11396 6
brcmfmac 186403 0
brcmutil 5661 1 brcmfmac
cfg80211 428871 1 brcmfmac
rfkill 16037 4 cfg80211,bluetooth
bcm2835_wdt 3225 0
bcm2835_gpiomem 2976 0
i2c_bcm2708 4834 0
spi_bcm2835aux 4427 0
spi_bcm2835 6678 0
uio_pdrv_genirq 3164 0
uio 8000 1 uio_pdrv_genirq
i2c_dev 5859 0
fuse 84037 3
ipv6 347620 55
pi@navio:~ $ dmesg
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 4.4.50-v7+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611) ) #970 SMP Mon Feb 20 19:18:29 GMT 2017
[ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine model: Raspberry Pi 3 Model B Rev 1.2
[ 0.000000] cma: Reserved 8 MiB at 0x36800000
[ 0.000000] Memory policy: Data cache writealloc
[ 0.000000] On node 0 totalpages: 225280
[ 0.000000] free_area_init_node: node 0, pgdat 808c5040, node_mem_map b6036000
[ 0.000000] Normal zone: 1980 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 225280 pages, LIFO batch:31
[ 0.000000] [bcm2709_smp_init_cpus] enter (9520->f3003010)
[ 0.000000] [bcm2709_smp_init_cpus] ncores=4
[ 0.000000] PERCPU: Embedded 13 pages/cpu @b5ff1000 s22592 r8192 d22464 u53248
[ 0.000000] pcpu-alloc: s22592 r8192 d22464 u53248 alloc=13*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 223300
[ 0.000000] Kernel command line: 8250.nr_uarts=1 dma.dmachans=0x7f35 bcm2708_fb.fbwidth=1680 bcm2708_fb.fbheight=1050 bcm2709.boardrev=0xa22082 bcm2709.serial=0xab32027d smsc95xx.macaddr=B8:27:EB:32:02:7D bcm2708_fb.fbswap=1 bcm2709.uart_clock=48000000 vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
[ 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: 874100K/901120K available (6357K kernel code, 432K rwdata, 1716K rodata, 476K init, 764K bss, 18828K reserved, 8192K cma-reserved)
[ 0.000000] Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
vmalloc : 0xb7800000 - 0xff800000 (1152 MB)
lowmem : 0x80000000 - 0xb7000000 ( 880 MB)
modules : 0x7f000000 - 0x80000000 ( 16 MB)
.text : 0x80008000 - 0x807ea73c (8074 kB)
.init : 0x807eb000 - 0x80862000 ( 476 kB)
.data : 0x80862000 - 0x808ce350 ( 433 kB)
.bss : 0x808d1000 - 0x809901ec ( 765 kB)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] Build-time adjustment of leaf fanout to 32.
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] Architected cp15 timer(s) running at 19.20MHz (phys).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
[ 0.000008] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
[ 0.000025] Switching to timer-based delay loop, resolution 52ns
[ 0.000286] Console: colour dummy device 80x30
[ 0.001334] console [tty1] enabled
[ 0.001387] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)
[ 0.001456] pid_max: default: 32768 minimum: 301
[ 0.001791] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.001834] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.002793] Disabling cpuset control group subsystem
[ 0.002850] Initializing cgroup subsys io
[ 0.002901] Initializing cgroup subsys memory
[ 0.002968] Initializing cgroup subsys devices
[ 0.003012] Initializing cgroup subsys freezer
[ 0.003054] Initializing cgroup subsys net_cls
[ 0.003126] CPU: Testing write buffer coherency: ok
[ 0.003209] ftrace: allocating 21246 entries in 63 pages
[ 0.052501] CPU0: update cpu_capacity 1024
[ 0.052567] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[ 0.052599] [bcm2709_smp_prepare_cpus] enter
[ 0.052759] Setting up static identity map for 0x8240 - 0x8274
[ 0.054409] [bcm2709_boot_secondary] cpu:1 started (0) 17
[ 0.054598] [bcm2709_secondary_init] enter cpu:1
[ 0.054641] CPU1: update cpu_capacity 1024
[ 0.054648] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[ 0.055020] [bcm2709_boot_secondary] cpu:2 started (0) 17
[ 0.055183] [bcm2709_secondary_init] enter cpu:2
[ 0.055204] CPU2: update cpu_capacity 1024
[ 0.055210] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[ 0.055567] [bcm2709_boot_secondary] cpu:3 started (0) 18
[ 0.055698] [bcm2709_secondary_init] enter cpu:3
[ 0.055718] CPU3: update cpu_capacity 1024
[ 0.055724] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[ 0.055784] Brought up 4 CPUs
[ 0.055883] SMP: Total of 4 processors activated (153.60 BogoMIPS).
[ 0.055913] CPU: All CPU(s) started in HYP mode.
[ 0.055939] CPU: Virtualization extensions available.
[ 0.056568] devtmpfs: initialized
[ 0.067955] VFP support v0.3: implementor 41 architecture 3 part 40 variant 3 rev 4
[ 0.068332] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.069079] pinctrl core: initialized pinctrl subsystem
[ 0.069629] NET: Registered protocol family 16
[ 0.074729] DMA: preallocated 4096 KiB pool for atomic coherent allocations
[ 0.082304] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[ 0.082354] hw-breakpoint: maximum watchpoint size is 8 bytes.
[ 0.082534] Serial: AMBA PL011 UART driver
[ 0.082694] uart-pl011 3f201000.uart: could not find pctldev for node /soc/gpio@7e200000/uart0_pins, deferring probe
[ 0.082904] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
[ 0.154659] bcm2835-dma 3f007000.dma: DMA legacy API manager at f3007000, dmachans=0x1
[ 0.155253] SCSI subsystem initialized
[ 0.155444] usbcore: registered new interface driver usbfs
[ 0.155546] usbcore: registered new interface driver hub
[ 0.155661] usbcore: registered new device driver usb
[ 0.162061] raspberrypi-firmware soc:firmware: Attached to firmware from 2016-06-02 16:05
[ 0.189157] clocksource: Switched to clocksource arch_sys_counter
[ 0.233998] FS-Cache: Loaded
[ 0.234306] CacheFiles: Loaded
[ 0.246625] NET: Registered protocol family 2
[ 0.247508] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.247648] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.247859] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.247974] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 0.248042] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 0.248295] NET: Registered protocol family 1
[ 0.248646] RPC: Registered named UNIX socket transport module.
[ 0.248678] RPC: Registered udp transport module.
[ 0.248706] RPC: Registered tcp transport module.
[ 0.248734] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.249787] hw perfevents: enabled with armv7_cortex_a7 PMU driver, 7 counters available
[ 0.251177] futex hash table entries: 1024 (order: 4, 65536 bytes)
[ 0.264528] VFS: Disk quotas dquot_6.6.0
[ 0.264822] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 0.267042] FS-Cache: Netfs 'nfs' registered for caching
[ 0.267983] NFS: Registering the id_resolver key type
[ 0.268045] Key type id_resolver registered
[ 0.268074] Key type id_legacy registered
[ 0.270427] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 0.270586] io scheduler noop registered
[ 0.270622] io scheduler deadline registered (default)
[ 0.270696] io scheduler cfq registered
[ 0.272875] brcmvirt-gpio soc:virtgpio: Failed to set gpiovirtbuf, trying to get err:0
[ 0.274264] BCM2708FB: allocated DMA memory f6c00000
[ 0.274311] BCM2708FB: allocated DMA channel 0 @ f3007000
[ 0.323728] Console: switching to colour frame buffer device 210x65
[ 0.352474] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[ 1.397638] bcm2835-rng 3f104000.rng: hwrng registered
[ 1.397977] vc-cma: Videocore CMA driver
[ 1.398106] vc-cma: vc_cma_base = 0x00000000
[ 1.398246] vc-cma: vc_cma_size = 0x00000000 (0 MiB)
[ 1.398403] vc-cma: vc_cma_initial = 0x00000000 (0 MiB)
[ 1.398820] vc-mem: phys_addr:0x00000000 mem_base=0x3dc00000 mem_size:0x3f000000(1008 MiB)
[ 1.413716] brd: module loaded
[ 1.422684] loop: module loaded
[ 1.423780] vchiq: vchiq_init_state: slot_zero = 0xb6c80000, is_master = 0
[ 1.425527] Loading iSCSI transport class v2.0-870.
[ 1.426374] usbcore: registered new interface driver smsc95xx
[ 1.426587] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 1.627011] Core Release: 2.80a
[ 1.627118] Setting default values for core params
[ 1.627285] Finished setting default values for core params
[ 1.827818] Using Buffer DMA mode
[ 1.827925] Periodic Transfer Interrupt Enhancement - disabled
[ 1.828091] Multiprocessor Interrupt Enhancement - disabled
[ 1.828251] OTG VER PARAM: 0, OTG VER FLAG: 0
[ 1.828385] Dedicated Tx FIFOs mode
[ 1.828845] WARN::dwc_otg_hcd_init:1047: FIQ DMA bounce buffers: virt = 0xb6c14000 dma = 0xf6c14000 len=9024
[ 1.829140] FIQ FSM acceleration enabled for :
Non-periodic Split Transactions
Periodic Split Transactions
High-Speed Isochronous Endpoints
Interrupt/Control Split Transaction hack enabled
[ 1.829762] dwc_otg: Microframe scheduler enabled
[ 1.829814] WARN::hcd_init_fiq:415: FIQ on core 1 at 0x80448d28
[ 1.829994] WARN::hcd_init_fiq:416: FIQ ASM at 0x80449098 length 36
[ 1.830178] WARN::hcd_init_fiq:441: MPHI regs_base at 0xb7f62000
[ 1.837649] dwc_otg 3f980000.usb: DWC OTG Controller
[ 1.845037] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
[ 1.852447] dwc_otg 3f980000.usb: irq 62, io mem 0x00000000
[ 1.859815] Init: Port Power? op_state=1
[ 1.867069] Init: Power Port (0)
[ 1.874440] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.881741] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.889034] usb usb1: Product: DWC OTG Controller
[ 1.896340] usb usb1: Manufacturer: Linux 4.4.50-v7+ dwc_otg_hcd
[ 1.903750] usb usb1: SerialNumber: 3f980000.usb
[ 1.912000] hub 1-0:1.0: USB hub found
[ 1.919335] hub 1-0:1.0: 1 port detected
[ 1.927142] dwc_otg: FIQ enabled
[ 1.927151] dwc_otg: NAK holdoff enabled
[ 1.927159] dwc_otg: FIQ split-transaction FSM enabled
[ 1.927205] Module dwc_common_port init
[ 1.927437] usbcore: registered new interface driver usb-storage
[ 1.934931] mousedev: PS/2 mouse device common for all mice
[ 1.942882] bcm2835-cpufreq: min=600000 max=1200000
[ 1.950337] sdhci: Secure Digital Host Controller Interface driver
[ 1.957517] sdhci: Copyright(c) Pierre Ossman
[ 1.964995] sdhost: log_buf @ b6c13000 (f6c13000)
[ 2.029185] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[ 2.038694] mmc-bcm2835 3f300000.mmc: mmc_debug:0 mmc_debug2:0
[ 2.045938] mmc-bcm2835 3f300000.mmc: DMA channel allocated
[ 2.086145] mmc0: host does not support reading read-only switch, assuming write-enable
[ 2.089277] sdhci-pltfm: SDHCI platform and OF driver helper
[ 2.090083] ledtrig-cpu: registered to indicate activity on CPUs
[ 2.090192] hidraw: raw HID events driver (C) Jiri Kosina
[ 2.090371] usbcore: registered new interface driver usbhid
[ 2.090374] usbhid: USB HID core driver
[ 2.091056] Initializing XFRM netlink socket
[ 2.091093] NET: Registered protocol family 17
[ 2.091244] Key type dns_resolver registered
[ 2.091686] Registering SWP/SWPB emulation handler
[ 2.092553] registered taskstats version 1
[ 2.092738] vc-sm: Videocore shared memory driver
[ 2.092749] [vc_sm_connected_init]: start
[ 2.093827] [vc_sm_connected_init]: end - returning 0
[ 2.094245] 3f201000.uart: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
[ 2.094600] of_cfs_init
[ 2.094706] of_cfs_init: OK
[ 2.129267] Indeed it is in host mode hprt0 = 00021501
[ 2.216120] Waiting for root device /dev/mmcblk0p2...
[ 2.218014] mmc0: new high speed SDHC card at address 59b4
[ 2.218653] mmcblk0: mmc0:59b4 USDU1 30.0 GiB
[ 2.223904] mmcblk0: p1 p2
[ 2.242971] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[ 2.244527] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 2.246095] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 2.248906] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[ 2.307170] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 2.314229] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[ 2.329198] usb 1-1: new high-speed USB device number 2 using dwc_otg
[ 2.336304] devtmpfs: mounted
[ 2.340680] mmc1: new high speed SDIO card at address 0001
[ 2.349965] Indeed it is in host mode hprt0 = 00001101
[ 2.369963] Freeing unused kernel memory: 476K (807eb000 - 80862000)
[ 2.549490] usb 1-1: New USB device found, idVendor=0424, idProduct=9514
[ 2.556551] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.564591] hub 1-1:1.0: USB hub found
[ 2.571895] hub 1-1:1.0: 5 ports detected
[ 2.764630] random: systemd: uninitialized urandom read (16 bytes read, 71 bits of entropy available)
[ 2.775715] systemd[1]: systemd 215 running in system mode. (+PAM +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ -SECCOMP -APPARMOR)
[ 2.783873] systemd[1]: Detected architecture 'arm'.
[ 2.859199] usb 1-1.1: new high-speed USB device number 3 using dwc_otg
[ 2.979528] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00
[ 2.987108] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.997836] smsc95xx v1.0.4
[ 3.006639] NET: Registered protocol family 10
[ 3.015566] systemd[1]: Inserted module 'ipv6'
[ 3.025063] systemd[1]: Set hostname to <navio>.
[ 3.062530] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:32:02:7d
[ 3.149230] usb 1-1.4: new high-speed USB device number 4 using dwc_otg
[ 3.191009] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read, 80 bits of entropy available)
[ 3.269639] usb 1-1.4: New USB device found, idVendor=413c, idProduct=1010
[ 3.277663] usb 1-1.4: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 3.285695] usb 1-1.4: Product: USB 2.0 Hub [MTT]
[ 3.294558] hub 1-1.4:1.0: USB hub found
[ 3.302649] hub 1-1.4:1.0: 4 ports detected
[ 3.389208] usb 1-1.5: new low-speed USB device number 5 using dwc_otg
[ 3.471426] random: systemd: uninitialized urandom read (16 bytes read, 84 bits of entropy available)
[ 3.480918] random: systemd: uninitialized urandom read (16 bytes read, 84 bits of entropy available)
[ 3.490258] random: systemd: uninitialized urandom read (16 bytes read, 84 bits of entropy available)
[ 3.505641] usb 1-1.5: New USB device found, idVendor=046d, idProduct=c016
[ 3.513593] usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3.521514] usb 1-1.5: Product: Optical USB Mouse
[ 3.529379] usb 1-1.5: Manufacturer: Logitech
[ 3.529417] random: systemd: uninitialized urandom read (16 bytes read, 84 bits of entropy available)
[ 3.529975] random: systemd: uninitialized urandom read (16 bytes read, 84 bits of entropy available)
[ 3.530125] random: systemd: uninitialized urandom read (16 bytes read, 84 bits of entropy available)
[ 3.567704] input: Logitech Optical USB Mouse as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5:1.0/0003:046D:C016.0001/input/input0
[ 3.568073] random: systemd: uninitialized urandom read (16 bytes read, 85 bits of entropy available)
[ 3.584949] hid-generic 0003:046D:C016.0001: input,hidraw0: USB HID v1.10 Mouse [Logitech Optical USB Mouse] on usb-3f980000.usb-1.5/input0
[ 3.586786] random: systemd: uninitialized urandom read (16 bytes read, 85 bits of entropy available)
[ 3.639231] usb 1-1.4.4: new low-speed USB device number 6 using dwc_otg
[ 3.737445] systemd[1]: Starting Forward Password Requests to Wall Directory Watch.
[ 3.746544] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[ 3.755408] systemd[1]: Starting Remote File Systems (Pre).
[ 3.774341] systemd[1]: Reached target Remote File Systems (Pre).
[ 3.783350] systemd[1]: Starting Arbitrary Executable File Formats File System Automount Point.
[ 3.803035] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[ 3.812313] systemd[1]: Starting Encrypted Volumes.
[ 3.821812] usb 1-1.4.4: New USB device found, idVendor=413c, idProduct=2110
[ 3.821822] usb 1-1.4.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3.821830] usb 1-1.4.4: Product: Dell Wired Multimedia Keyboard
[ 3.821837] usb 1-1.4.4: Manufacturer: Dell
[ 3.870627] systemd[1]: Reached target Encrypted Volumes.
[ 3.880224] systemd[1]: Starting Swap.
[ 3.900323] systemd[1]: Reached target Swap.
[ 3.909796] systemd[1]: Expecting device dev-mmcblk0p1.device...
[ 3.921411] input: Dell Dell Wired Multimedia Keyboard as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4.4/1-1.4.4:1.0/0003:413C:2110.0002/input/input1
[ 3.939467] systemd[1]: Starting Root Slice.
[ 3.960167] systemd[1]: Created slice Root Slice.
[ 3.969865] systemd[1]: Starting /dev/initctl Compatibility Named Pipe.
[ 3.980019] hid-generic 0003:413C:2110.0002: input,hidraw1: USB HID v1.10 Keyboard [Dell Dell Wired Multimedia Keyboard] on usb-3f980000.usb-1.4.4/input0
[ 4.000353] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[ 4.010443] systemd[1]: Starting Delayed Shutdown Socket.
[ 4.031696] systemd[1]: Listening on Delayed Shutdown Socket.
[ 4.041753] systemd[1]: Starting Journal Socket (/dev/log).
[ 4.063028] systemd[1]: Listening on Journal Socket (/dev/log).
[ 4.073201] systemd[1]: Starting User and Session Slice.
[ 4.089308] input: Dell Dell Wired Multimedia Keyboard as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4.4/1-1.4.4:1.1/0003:413C:2110.0003/input/input2
[ 4.104785] systemd[1]: Created slice User and Session Slice.
[ 4.115106] systemd[1]: Starting udev Control Socket.
[ 4.136261] systemd[1]: Listening on udev Control Socket.
[ 4.146391] systemd[1]: Starting udev Kernel Socket.
[ 4.149922] hid-generic 0003:413C:2110.0003: input,hiddev0,hidraw2: USB HID v1.10 Mouse [Dell Dell Wired Multimedia Keyboard] on usb-3f980000.usb-1.4.4/input1
[ 4.178423] systemd[1]: Listening on udev Kernel Socket.
[ 4.188982] systemd[1]: Starting Journal Socket.
[ 4.211085] systemd[1]: Listening on Journal Socket.
[ 4.221788] systemd[1]: Starting System Slice.
[ 4.243792] systemd[1]: Created slice System Slice.
[ 4.254367] systemd[1]: Starting system-systemd\x2dfsck.slice.
[ 4.276494] systemd[1]: Created slice system-systemd\x2dfsck.slice.
[ 4.287341] systemd[1]: Starting Increase datagram queue length...
[ 4.359771] systemd[1]: Starting Restore / save the current clock...
[ 4.401769] systemd[1]: Started Set Up Additional Binary Formats.
[ 4.412433] systemd[1]: Mounting Debug File System...
[ 4.472315] systemd[1]: Starting Load Kernel Modules...
[ 4.540160] systemd[1]: Starting udev Coldplug all Devices...
[ 4.564829] systemd[1]: Mounted Huge Pages File System.
[ 4.571362] fuse init (API version 7.23)
[ 4.585664] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[ 4.608931] systemd[1]: Mounting POSIX Message Queue File System...
[ 4.632400] systemd[1]: Starting system-getty.slice.
[ 4.643153] i2c /dev entries driver
[ 4.665360] systemd[1]: Created slice system-getty.slice.
[ 4.675200] systemd[1]: Starting File System Check on Root Device...
[ 4.698141] systemd[1]: Starting Slices.
[ 4.719404] systemd[1]: Reached target Slices.
[ 4.742054] systemd[1]: Mounted POSIX Message Queue File System.
[ 4.762218] systemd[1]: Mounted Debug File System.
[ 4.782725] systemd[1]: Started Increase datagram queue length.
[ 4.807869] systemd[1]: Started Restore / save the current clock.
[ 4.817944] systemd[1]: systemd-modules-load.service: main process exited, code=exited, status=1/FAILURE
[ 4.847475] systemd[1]: Failed to start Load Kernel Modules.
[ 4.856718] systemd[1]: Unit systemd-modules-load.service entered failed state.
[ 4.881002] systemd[1]: Started Create list of required static device nodes for the current kernel.
[ 4.902551] systemd[1]: Started File System Check on Root Device.
[ 4.914249] systemd[1]: Time has been changed
[ 4.935090] systemd[1]: Started udev Coldplug all Devices.
[ 5.091104] systemd[1]: Starting Create Static Device Nodes in /dev...
[ 5.150088] systemd[1]: Mounting Configuration File System...
[ 5.171532] systemd[1]: Mounting FUSE Control File System...
[ 5.193763] systemd[1]: Starting Apply Kernel Variables...
[ 5.216262] systemd[1]: Starting Syslog Socket.
[ 5.235873] systemd[1]: Listening on Syslog Socket.
[ 5.245425] systemd[1]: Starting Journal Service...
[ 5.267819] systemd[1]: Started Journal Service.
[ 5.458480] systemd-udevd[139]: starting version 215
[ 5.900298] bcm2708_i2c 3f804000.i2c: BSC1 Controller at 0x3f804000 (irq 83) (baudrate 1000000)
[ 5.902172] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[ 5.916796] bcm2835-wdt 3f100000.watchdog: Broadcom BCM2835 watchdog timer
[ 6.182792] usbcore: registered new interface driver brcmfmac
[ 6.274174] random: nonblocking pool is initialized
[ 6.291752] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 6.348105] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: May 27 2016 00:13:38 version 7.45.41.26 (r640327) FWID 01-df77e4a7
[ 6.370807] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code
[ 6.566233] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code
[ 6.566243] cfg80211: World regulatory domain updated:
[ 6.566252] cfg80211: DFS Master region: unset
[ 6.566253] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 6.566267] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 6.566277] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz, 92000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 6.566283] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[ 6.566292] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 6.566301] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[ 6.566308] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[ 6.566315] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[ 6.566322] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[ 6.821658] systemd-journald[138]: Received request to flush runtime journal from PID 1
[ 7.553764] brcmfmac: brcmf_add_if: ERROR: netdev:wlan0 already exists
[ 7.553792] brcmfmac: brcmf_add_if: ignore IF event
[ 7.559344] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 7.559403] brcmfmac: power management disabled
[ 8.252880] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 9.270357] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[ 9.270547] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 26.631220] Bluetooth: Core ver 2.21
[ 26.631277] NET: Registered protocol family 31
[ 26.631283] Bluetooth: HCI device and connection manager initialized
[ 26.631299] Bluetooth: HCI socket layer initialized
[ 26.631309] Bluetooth: L2CAP socket layer initialized
[ 26.631332] Bluetooth: SCO socket layer initialized
[ 26.693709] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 26.693731] Bluetooth: BNEP filters: protocol multicast
[ 26.693749] Bluetooth: BNEP socket layer initialized
pi@navio:~ $ sudo modprobe -r rcio_spi && sudo modprobe rcio_spi
modprobe: FATAL: Module rcio_spi not found.
It says “Module rcio_spi not found” when I executed “sudo modprobe -r rcio_spi && sudo modprobe rcio_spi”
This doesn’t seem to be normal.
Also, I recently noticed that the Navio2 docs are different from the last time I tried running arducopter.
I tried “Sudo update-alternatives --config arducopter” and got “update-alternatives: error: no alternatives for arducopter” and “/etc/default/arducopter” file does not exist. Please note that these commands were executed on a successfully updated & upgraded system.
Any suggestions would be highly appreciated 
Thanks
Kashish