FlightAware Discussions

Dump 1090 and SkyAware sometimes stop updating

I looked at a few threads but wasn’t able to come up with a definite fix. The “fix” is probably buried in the threads somewhere. I am a total newbie at this. Problem seems to happen every few days. So far I just restart the Pi and things seem to work for another few days. I am using WiFi. I just installed this system about 2 weeks ago. I am only using the Pi for this purpose. I am feeding FlightAware and Flightradar24. Yesterday I upgraded the antenna and feedline. Receiving a lot more AC.

Any input or advise would be appreciated…

Thank you !!

Please describe the problem…

Check for power issues:

sudo dmesg --ctime | grep voltage

Power problems can also independent of the above check be an USB extension that is used to connect the SDR.

I get a yellow error message at the left bottom of the screen that states something to the effect…

AJAX call failed (error: Not Found). Maybe dump1090 is no longer running?
The displayed map data will be out of date.

Yep, that sounds like dump1090 can no longer talk to the dongle. Try @wiedehopf’s suggestions about power, above.

I executed the sudo dmesg --ctime command. got a dump of some stuff. Not sure what I’m looking at. See some stuff in red. Not sure if that red stuff is what is being identified as a problem or not. In red it says something about limited channels being available. Not sure if that is a problem. The dump was pertaining to yesterday when I had to disconnect the feed line to reroute it. I only had it disconnect for a couple minutes then restarted the Pi. The issue where dump 1090 quit was a few days ago and not yesterday. So perhaps the problem where dump 1090 quit was not captured? I beg indulgence bcz I am very unfamiliar with all of this and need to learn what I am doing and looking at…

Why don’t you post it?

pi@raspberrypi:~ $ sudo dmesg --ctime
[Fri Apr 3 14:55:49 2020] Booting Linux on physical CPU 0x0
[Fri Apr 3 14:55:49 2020] Linux version 4.19.97-v7+ (dom@buildbot) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1294 SMP Thu Jan 30 13:15:58 GMT 2020
[Fri Apr 3 14:55:49 2020] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
[Fri Apr 3 14:55:49 2020] CPU: div instructions available: patching division code
[Fri Apr 3 14:55:49 2020] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[Fri Apr 3 14:55:49 2020] OF: fdt: Machine model: Raspberry Pi 3 Model B Rev 1.2
[Fri Apr 3 14:55:49 2020] Memory policy: Data cache writealloc
[Fri Apr 3 14:55:49 2020] cma: Reserved 8 MiB at 0x3ac00000
[Fri Apr 3 14:55:49 2020] On node 0 totalpages: 242688
[Fri Apr 3 14:55:49 2020] Normal zone: 2133 pages used for memmap
[Fri Apr 3 14:55:49 2020] Normal zone: 0 pages reserved
[Fri Apr 3 14:55:49 2020] Normal zone: 242688 pages, LIFO batch:63
[Fri Apr 3 14:55:49 2020] random: get_random_bytes called from start_kernel+0xac/0x4b4 with crng_init=0
[Fri Apr 3 14:55:49 2020] percpu: Embedded 16 pages/cpu s36864 r8192 d20480 u65536
[Fri Apr 3 14:55:49 2020] pcpu-alloc: s36864 r8192 d20480 u65536 alloc=16*4096
[Fri Apr 3 14:55:49 2020] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[Fri Apr 3 14:55:49 2020] Built 1 zonelists, mobility grouping on. Total pages: 240555
[Fri Apr 3 14:55:49 2020] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 bcm2708_fb.fbwidth=1440 bcm2708_fb.fbheight=900 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:16:E0:CE vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p7 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
[Fri Apr 3 14:55:49 2020] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[Fri Apr 3 14:55:49 2020] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[Fri Apr 3 14:55:49 2020] Memory: 939080K/970752K available (8192K kernel code, 653K rwdata, 2220K rodata, 1024K init, 822K bss, 23480K reserved, 8192K cma-reserved)
[Fri Apr 3 14:55:49 2020] Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
vmalloc : 0xbb800000 - 0xff800000 (1088 MB)
lowmem : 0x80000000 - 0xbb400000 ( 948 MB)
modules : 0x7f000000 - 0x80000000 ( 16 MB)
.text : 0x(ptrval) - 0x(ptrval) (9184 kB)
.init : 0x(ptrval) - 0x(ptrval) (1024 kB)
.data : 0x(ptrval) - 0x(ptrval) ( 654 kB)
.bss : 0x(ptrval) - 0x(ptrval) ( 823 kB)
[Fri Apr 3 14:55:49 2020] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[Fri Apr 3 14:55:49 2020] ftrace: allocating 26860 entries in 79 pages
[Fri Apr 3 14:55:49 2020] rcu: Hierarchical RCU implementation.
[Fri Apr 3 14:55:49 2020] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[Fri Apr 3 14:55:49 2020] arch_timer: cp15 timer(s) running at 19.20MHz (phys).
[Fri Apr 3 14:55:49 2020] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
[Fri Apr 3 14:55:49 2020] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
[Fri Apr 3 14:55:49 2020] Switching to timer-based delay loop, resolution 52ns
[Fri Apr 3 14:55:49 2020] Console: colour dummy device 80x30
[Fri Apr 3 14:55:49 2020] console [tty1] enabled
[Fri Apr 3 14:55:49 2020] Calibrating delay loop (skipped), value calculated using timer frequency… 38.40 BogoMIPS (lpj=192000)
[Fri Apr 3 14:55:49 2020] pid_max: default: 32768 minimum: 301
[Fri Apr 3 14:55:49 2020] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[Fri Apr 3 14:55:49 2020] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[Fri Apr 3 14:55:49 2020] CPU: Testing write buffer coherency: ok
[Fri Apr 3 14:55:49 2020] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[Fri Apr 3 14:55:49 2020] Setting up static identity map for 0x100000 - 0x10003c
[Fri Apr 3 14:55:49 2020] rcu: Hierarchical SRCU implementation.
[Fri Apr 3 14:55:49 2020] smp: Bringing up secondary CPUs …
[Fri Apr 3 14:55:49 2020] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[Fri Apr 3 14:55:49 2020] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[Fri Apr 3 14:55:49 2020] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[Fri Apr 3 14:55:49 2020] smp: Brought up 1 node, 4 CPUs
[Fri Apr 3 14:55:49 2020] SMP: Total of 4 processors activated (153.60 BogoMIPS).
[Fri Apr 3 14:55:49 2020] CPU: All CPU(s) started in HYP mode.
[Fri Apr 3 14:55:49 2020] CPU: Virtualization extensions available.
[Fri Apr 3 14:55:49 2020] devtmpfs: initialized
[Fri Apr 3 14:55:49 2020] VFP support v0.3: implementor 41 architecture 3 part 40 variant 3 rev 4
[Fri Apr 3 14:55:49 2020] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[Fri Apr 3 14:55:49 2020] futex hash table entries: 1024 (order: 4, 65536 bytes)
[Fri Apr 3 14:55:49 2020] pinctrl core: initialized pinctrl subsystem
[Fri Apr 3 14:55:49 2020] NET: Registered protocol family 16
[Fri Apr 3 14:55:49 2020] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[Fri Apr 3 14:55:49 2020] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[Fri Apr 3 14:55:49 2020] hw-breakpoint: maximum watchpoint size is 8 bytes.
[Fri Apr 3 14:55:49 2020] Serial: AMBA PL011 UART driver
[Fri Apr 3 14:55:49 2020] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
[Fri Apr 3 14:55:49 2020] raspberrypi-firmware soc:firmware: Attached to firmware from 2020-02-12 12:38, variant start
[Fri Apr 3 14:55:49 2020] raspberrypi-firmware soc:firmware: Firmware hash is 53a54c770c493957d99bf49762dfabc4eee00e45
[Fri Apr 3 14:55:49 2020] bcm2835-dma 3f007000.dma: DMA legacy API manager at (ptrval), dmachans=0x1
[Fri Apr 3 14:55:49 2020] SCSI subsystem initialized
[Fri Apr 3 14:55:49 2020] usbcore: registered new interface driver usbfs
[Fri Apr 3 14:55:49 2020] usbcore: registered new interface driver hub
[Fri Apr 3 14:55:49 2020] usbcore: registered new device driver usb
[Fri Apr 3 14:55:49 2020] clocksource: Switched to clocksource arch_sys_counter
[Fri Apr 3 14:55:49 2020] VFS: Disk quotas dquot_6.6.0
[Fri Apr 3 14:55:49 2020] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[Fri Apr 3 14:55:49 2020] FS-Cache: Loaded
[Fri Apr 3 14:55:49 2020] CacheFiles: Loaded
[Fri Apr 3 14:55:49 2020] NET: Registered protocol family 2
[Fri Apr 3 14:55:49 2020] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes)
[Fri Apr 3 14:55:49 2020] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[Fri Apr 3 14:55:49 2020] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[Fri Apr 3 14:55:49 2020] TCP: Hash tables configured (established 8192 bind 8192)
[Fri Apr 3 14:55:49 2020] UDP hash table entries: 512 (order: 2, 16384 bytes)
[Fri Apr 3 14:55:49 2020] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[Fri Apr 3 14:55:49 2020] NET: Registered protocol family 1
[Fri Apr 3 14:55:49 2020] RPC: Registered named UNIX socket transport module.
[Fri Apr 3 14:55:49 2020] RPC: Registered udp transport module.
[Fri Apr 3 14:55:49 2020] RPC: Registered tcp transport module.
[Fri Apr 3 14:55:49 2020] RPC: Registered tcp NFSv4.1 backchannel transport module.
[Fri Apr 3 14:55:49 2020] hw perfevents: enabled with armv7_cortex_a7 PMU driver, 7 counters available
[Fri Apr 3 14:55:49 2020] Initialise system trusted keyrings
[Fri Apr 3 14:55:49 2020] workingset: timestamp_bits=14 max_order=18 bucket_order=4
[Fri Apr 3 14:55:49 2020] FS-Cache: Netfs ‘nfs’ registered for caching
[Fri Apr 3 14:55:49 2020] NFS: Registering the id_resolver key type
[Fri Apr 3 14:55:49 2020] Key type id_resolver registered
[Fri Apr 3 14:55:49 2020] Key type id_legacy registered
[Fri Apr 3 14:55:49 2020] nfs4filelayout_init: NFSv4 File Layout Driver Registering…
[Fri Apr 3 14:55:49 2020] Key type asymmetric registered
[Fri Apr 3 14:55:49 2020] Asymmetric key parser ‘x509’ registered
[Fri Apr 3 14:55:49 2020] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
[Fri Apr 3 14:55:49 2020] io scheduler noop registered
[Fri Apr 3 14:55:49 2020] io scheduler deadline registered (default)
[Fri Apr 3 14:55:49 2020] io scheduler cfq registered
[Fri Apr 3 14:55:49 2020] io scheduler mq-deadline registered (default)
[Fri Apr 3 14:55:49 2020] io scheduler kyber registered
[Fri Apr 3 14:55:49 2020] bcm2708_fb soc:fb: FB found 1 display(s)
[Fri Apr 3 14:55:49 2020] Console: switching to colour frame buffer device 180x56
[Fri Apr 3 14:55:49 2020] bcm2708_fb soc:fb: Registered framebuffer for display 0, size 1440x900
[Fri Apr 3 14:55:49 2020] bcm2835-rng 3f104000.rng: hwrng registered
[Fri Apr 3 14:55:49 2020] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
[Fri Apr 3 14:55:49 2020] vc-sm: Videocore shared memory driver
[Fri Apr 3 14:55:49 2020] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[Fri Apr 3 14:55:49 2020] brd: module loaded
[Fri Apr 3 14:55:49 2020] loop: module loaded
[Fri Apr 3 14:55:49 2020] Loading iSCSI transport class v2.0-870.
[Fri Apr 3 14:55:49 2020] libphy: Fixed MDIO Bus: probed
[Fri Apr 3 14:55:49 2020] usbcore: registered new interface driver lan78xx
[Fri Apr 3 14:55:49 2020] usbcore: registered new interface driver smsc95xx
[Fri Apr 3 14:55:49 2020] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[Fri Apr 3 14:55:49 2020] dwc_otg 3f980000.usb: base=(ptrval)
[Fri Apr 3 14:55:49 2020] Core Release: 2.80a
[Fri Apr 3 14:55:49 2020] Setting default values for core params
[Fri Apr 3 14:55:49 2020] Finished setting default values for core params
[Fri Apr 3 14:55:49 2020] Using Buffer DMA mode
[Fri Apr 3 14:55:49 2020] Periodic Transfer Interrupt Enhancement - disabled
[Fri Apr 3 14:55:49 2020] Multiprocessor Interrupt Enhancement - disabled
[Fri Apr 3 14:55:49 2020] OTG VER PARAM: 0, OTG VER FLAG: 0
[Fri Apr 3 14:55:49 2020] Dedicated Tx FIFOs mode
[Fri Apr 3 14:55:49 2020] WARN::dwc_otg_hcd_init:1074: FIQ DMA bounce buffers: virt = bad04000 dma = 0xfad04000 len=9024
[Fri Apr 3 14:55:49 2020] FIQ FSM acceleration enabled for :
Non-periodic Split Transactions
Periodic Split Transactions
High-Speed Isochronous Endpoints
Interrupt/Control Split Transaction hack enabled
[Fri Apr 3 14:55:49 2020] dwc_otg: Microframe scheduler enabled
[Fri Apr 3 14:55:49 2020] WARN::hcd_init_fiq:457: FIQ on core 1
[Fri Apr 3 14:55:49 2020] WARN::hcd_init_fiq:458: FIQ ASM at 8067fd10 length 36
[Fri Apr 3 14:55:49 2020] WARN::hcd_init_fiq:497: MPHI regs_base at bb810000
[Fri Apr 3 14:55:49 2020] dwc_otg 3f980000.usb: DWC OTG Controller
[Fri Apr 3 14:55:49 2020] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
[Fri Apr 3 14:55:49 2020] dwc_otg 3f980000.usb: irq 56, io mem 0x00000000
[Fri Apr 3 14:55:49 2020] Init: Port Power? op_state=1
[Fri Apr 3 14:55:49 2020] Init: Power Port (0)
[Fri Apr 3 14:55:49 2020] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
[Fri Apr 3 14:55:49 2020] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[Fri Apr 3 14:55:49 2020] usb usb1: Product: DWC OTG Controller
[Fri Apr 3 14:55:49 2020] usb usb1: Manufacturer: Linux 4.19.97-v7+ dwc_otg_hcd
[Fri Apr 3 14:55:49 2020] usb usb1: SerialNumber: 3f980000.usb
[Fri Apr 3 14:55:49 2020] hub 1-0:1.0: USB hub found
[Fri Apr 3 14:55:49 2020] hub 1-0:1.0: 1 port detected
[Fri Apr 3 14:55:49 2020] dwc_otg: FIQ enabled
[Fri Apr 3 14:55:49 2020] dwc_otg: NAK holdoff enabled
[Fri Apr 3 14:55:49 2020] dwc_otg: FIQ split-transaction FSM enabled
[Fri Apr 3 14:55:49 2020] Module dwc_common_port init
[Fri Apr 3 14:55:49 2020] usbcore: registered new interface driver usb-storage
[Fri Apr 3 14:55:49 2020] mousedev: PS/2 mouse device common for all mice
[Fri Apr 3 14:55:49 2020] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
[Fri Apr 3 14:55:49 2020] bcm2835-cpufreq: min=600000 max=1200000
[Fri Apr 3 14:55:49 2020] sdhci: Secure Digital Host Controller Interface driver
[Fri Apr 3 14:55:49 2020] sdhci: Copyright© Pierre Ossman
[Fri Apr 3 14:55:49 2020] mmc-bcm2835 3f300000.mmcnr: could not get clk, deferring probe
[Fri Apr 3 14:55:49 2020] sdhost-bcm2835 3f202000.mmc: could not get clk, deferring probe
[Fri Apr 3 14:55:49 2020] sdhci-pltfm: SDHCI platform and OF driver helper
[Fri Apr 3 14:55:49 2020] ledtrig-cpu: registered to indicate activity on CPUs
[Fri Apr 3 14:55:49 2020] hidraw: raw HID events driver © Jiri Kosina
[Fri Apr 3 14:55:49 2020] usbcore: registered new interface driver usbhid
[Fri Apr 3 14:55:49 2020] usbhid: USB HID core driver
[Fri Apr 3 14:55:49 2020] vchiq: vchiq_init_state: slot_zero = (ptrval), is_master = 0
[Fri Apr 3 14:55:49 2020] [vc_sm_connected_init]: start
[Fri Apr 3 14:55:49 2020] [vc_sm_connected_init]: end - returning 0
[Fri Apr 3 14:55:49 2020] Initializing XFRM netlink socket
[Fri Apr 3 14:55:49 2020] NET: Registered protocol family 17
[Fri Apr 3 14:55:49 2020] Key type dns_resolver registered
[Fri Apr 3 14:55:49 2020] Registering SWP/SWPB emulation handler
[Fri Apr 3 14:55:49 2020] registered taskstats version 1
[Fri Apr 3 14:55:49 2020] Loading compiled-in X.509 certificates
[Fri Apr 3 14:55:49 2020] uart-pl011 3f201000.serial: cts_event_workaround enabled
[Fri Apr 3 14:55:49 2020] 3f201000.serial: ttyAMA0 at MMIO 0x3f201000 (irq = 81, base_baud = 0) is a PL011 rev2
[Fri Apr 3 14:55:49 2020] mmc-bcm2835 3f300000.mmcnr: mmc_debug:0 mmc_debug2:0
[Fri Apr 3 14:55:49 2020] mmc-bcm2835 3f300000.mmcnr: DMA channel allocated
[Fri Apr 3 14:55:49 2020] sdhost: log_buf @ (ptrval) (fad07000)
[Fri Apr 3 14:55:49 2020] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[Fri Apr 3 14:55:49 2020] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[Fri Apr 3 14:55:49 2020] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[Fri Apr 3 14:55:49 2020] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[Fri Apr 3 14:55:49 2020] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[Fri Apr 3 14:55:49 2020] of_cfs_init
[Fri Apr 3 14:55:49 2020] of_cfs_init: OK
[Fri Apr 3 14:55:49 2020] Waiting for root device /dev/mmcblk0p7…
[Fri Apr 3 14:55:49 2020] mmc0: host does not support reading read-only switch, assuming write-enable
[Fri Apr 3 14:55:49 2020] mmc0: new high speed SDHC card at address 0001
[Fri Apr 3 14:55:49 2020] mmcblk0: mmc0:0001 EB1QT 29.8 GiB
[Fri Apr 3 14:55:49 2020] random: fast init done
[Fri Apr 3 14:55:49 2020] mmcblk0: p1 p2 < p5 p6 p7 >
[Fri Apr 3 14:55:49 2020] mmc1: new high speed SDIO card at address 0001
[Fri Apr 3 14:55:49 2020] EXT4-fs (mmcblk0p7): mounted filesystem with ordered data mode. Opts: (null)
[Fri Apr 3 14:55:49 2020] VFS: Mounted root (ext4 filesystem) readonly on device 179:7.
[Fri Apr 3 14:55:49 2020] devtmpfs: mounted
[Fri Apr 3 14:55:49 2020] Indeed it is in host mode hprt0 = 00021501
[Fri Apr 3 14:55:49 2020] Freeing unused kernel memory: 1024K
[Fri Apr 3 14:55:50 2020] Run /sbin/init as init process
[Fri Apr 3 14:55:50 2020] usb 1-1: new high-speed USB device number 2 using dwc_otg
[Fri Apr 3 14:55:50 2020] Indeed it is in host mode hprt0 = 00001101
[Fri Apr 3 14:55:50 2020] usb 1-1: New USB device found, idVendor=0424, idProduct=9514, bcdDevice= 2.00
[Fri Apr 3 14:55:50 2020] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[Fri Apr 3 14:55:50 2020] hub 1-1:1.0: USB hub found
[Fri Apr 3 14:55:50 2020] hub 1-1:1.0: 5 ports detected
[Fri Apr 3 14:55:50 2020] systemd[1]: System time before build time, advancing clock.
[Fri Apr 3 14:55:50 2020] usb 1-1.1: new high-speed USB device number 3 using dwc_otg
[Fri Apr 3 14:55:50 2020] NET: Registered protocol family 10
[Fri Apr 3 14:55:50 2020] Segment Routing with IPv6
[Fri Apr 3 14:55:50 2020] 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)
[Fri Apr 3 14:55:50 2020] systemd[1]: Detected architecture arm.
[Fri Apr 3 14:55:50 2020] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00, bcdDevice= 2.00
[Fri Apr 3 14:55:50 2020] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[Fri Apr 3 14:55:50 2020] smsc95xx v1.0.6
[Fri Apr 3 14:55:50 2020] systemd[1]: Set hostname to .
[Fri Apr 3 14:55:50 2020] smsc95xx 1-1.1:1.0 eth0: register ‘smsc95xx’ at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:16:e0:ce
[Fri Apr 3 14:55:51 2020] usb 1-1.2: new high-speed USB device number 4 using dwc_otg
[Fri Apr 3 14:55:51 2020] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=2832, bcdDevice= 1.00
[Fri Apr 3 14:55:51 2020] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[Fri Apr 3 14:55:51 2020] usb 1-1.2: Product: RTL2832U
[Fri Apr 3 14:55:51 2020] usb 1-1.2: Manufacturer: Realtek
[Fri Apr 3 14:55:51 2020] usb 1-1.2: SerialNumber: 00001000
[Fri Apr 3 14:55:51 2020] usb 1-1.3: new low-speed USB device number 5 using dwc_otg
[Fri Apr 3 14:55:51 2020] usb 1-1.3: New USB device found, idVendor=0000, idProduct=3825, bcdDevice= 1.00
[Fri Apr 3 14:55:51 2020] usb 1-1.3: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[Fri Apr 3 14:55:51 2020] usb 1-1.3: Product: USB OPTICAL MOUSE
[Fri Apr 3 14:55:51 2020] input: USB OPTICAL MOUSE as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.0/0003:0000:3825.0001/input/input0
[Fri Apr 3 14:55:51 2020] hid-generic 0003:0000:3825.0001: input,hidraw0: USB HID v1.11 Mouse [ USB OPTICAL MOUSE] on usb-3f980000.usb-1.3/input0
[Fri Apr 3 14:55:51 2020] systemd[1]: /lib/systemd/system/lighttpd.service:6: PIDFile= references path below legacy directory /var/run/, updating /var/run/lighttpd.pid → /run/lighttpd.pid; please update the unit file accordingly.
[Fri Apr 3 14:55:51 2020] usb 1-1.5: new low-speed USB device number 6 using dwc_otg
[Fri Apr 3 14:55:51 2020] random: systemd: uninitialized urandom read (16 bytes read)
[Fri Apr 3 14:55:51 2020] random: systemd: uninitialized urandom read (16 bytes read)
[Fri Apr 3 14:55:51 2020] systemd[1]: Reached target Swap.
[Fri Apr 3 14:55:51 2020] random: systemd: uninitialized urandom read (16 bytes read)
[Fri Apr 3 14:55:51 2020] systemd[1]: Listening on udev Kernel Socket.
[Fri Apr 3 14:55:51 2020] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[Fri Apr 3 14:55:51 2020] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[Fri Apr 3 14:55:51 2020] systemd[1]: Listening on udev Control Socket.
[Fri Apr 3 14:55:51 2020] systemd[1]: Listening on Syslog Socket.
[Fri Apr 3 14:55:51 2020] usb 1-1.5: New USB device found, idVendor=1c4f, idProduct=0002, bcdDevice= 1.10
[Fri Apr 3 14:55:51 2020] usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[Fri Apr 3 14:55:51 2020] usb 1-1.5: Product: HCT Keyboard
[Fri Apr 3 14:55:51 2020] usb 1-1.5: Manufacturer: SEM
[Fri Apr 3 14:55:51 2020] input: SEM HCT Keyboard as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5:1.0/0003:1C4F:0002.0002/input/input1
[Fri Apr 3 14:55:52 2020] hid-generic 0003:1C4F:0002.0002: input,hidraw1: USB HID v1.10 Keyboard [SEM HCT Keyboard] on usb-3f980000.usb-1.5/input0
[Fri Apr 3 14:55:52 2020] i2c /dev entries driver
[Fri Apr 3 14:55:52 2020] input: SEM HCT Keyboard Consumer Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5:1.1/0003:1C4F:0002.0003/input/input2
[Fri Apr 3 14:55:52 2020] input: SEM HCT Keyboard System Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5:1.1/0003:1C4F:0002.0003/input/input3
[Fri Apr 3 14:55:52 2020] hid-generic 0003:1C4F:0002.0003: input,hidraw2: USB HID v1.10 Device [SEM HCT Keyboard] on usb-3f980000.usb-1.5/input1
[Fri Apr 3 14:55:52 2020] EXT4-fs (mmcblk0p7): re-mounted. Opts: (null)
[Fri Apr 3 14:55:52 2020] systemd-journald[105]: Received request to flush runtime journal from PID 1
[Fri Apr 3 14:55:53 2020] media: Linux media interface: v0.10
[Fri Apr 3 14:55:53 2020] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[Fri Apr 3 14:55:53 2020] bcm2835_vc_sm_cma_probe: Videocore shared memory driver
[Fri Apr 3 14:55:53 2020] [vc_sm_connected_init]: start
[Fri Apr 3 14:55:53 2020] [vc_sm_connected_init]: installed successfully
[Fri Apr 3 14:55:53 2020] videodev: Linux video capture interface: v2.00
[Fri Apr 3 14:55:53 2020] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[Fri Apr 3 14:55:53 2020] bcm2835_codec: module is from the staging directory, the quality is unknown, you have been warned.
[Fri Apr 3 14:55:53 2020] bcm2835-codec bcm2835-codec: Device registered as /dev/video10
[Fri Apr 3 14:55:53 2020] bcm2835-codec bcm2835-codec: Loaded V4L2 decode
[Fri Apr 3 14:55:53 2020] bcm2835-codec bcm2835-codec: Device registered as /dev/video11
[Fri Apr 3 14:55:53 2020] bcm2835-codec bcm2835-codec: Loaded V4L2 encode
[Fri Apr 3 14:55:53 2020] bcm2835_v4l2: module is from the staging directory, the quality is unknown, you have been warned.
[Fri Apr 3 14:55:53 2020] bcm2835-codec bcm2835-codec: Device registered as /dev/video12
[Fri Apr 3 14:55:53 2020] bcm2835-codec bcm2835-codec: Loaded V4L2 isp
[Fri Apr 3 14:55:53 2020] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned.
[Fri Apr 3 14:55:53 2020] bcm2835_audio soc:audio: card created with 8 channels
[Fri Apr 3 14:55:53 2020] usb 1-1.2: dvb_usb_v2: found a ‘Realtek RTL2832U reference design’ in warm state
[Fri Apr 3 14:55:53 2020] usb 1-1.2: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[Fri Apr 3 14:55:53 2020] dvbdev: DVB: registering new adapter (Realtek RTL2832U reference design)
[Fri Apr 3 14:55:54 2020] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[Fri Apr 3 14:55:54 2020] i2c i2c-3: Added multiplexed i2c bus 4
[Fri Apr 3 14:55:54 2020] rtl2832 3-0010: Realtek RTL2832 successfully attached
[Fri Apr 3 14:55:54 2020] usb 1-1.2: DVB: registering adapter 0 frontend 0 (Realtek RTL2832 (DVB-T))…
[Fri Apr 3 14:55:54 2020] r820t 4-001a: creating new instance
[Fri Apr 3 14:55:54 2020] r820t 4-001a: Rafael Micro r820t successfully identified
[Fri Apr 3 14:55:54 2020] Registered IR keymap rc-empty
[Fri Apr 3 14:55:54 2020] rc rc0: Realtek RTL2832U reference design as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/rc/rc0
[Fri Apr 3 14:55:54 2020] input: Realtek RTL2832U reference design as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/rc/rc0/input4
[Fri Apr 3 14:55:54 2020] rc rc0: lirc_dev: driver dvb_usb_rtl28xxu registered at minor = 0, raw IR receiver, no transmitter
[Fri Apr 3 14:55:54 2020] usb 1-1.2: dvb_usb_v2: schedule remote query interval to 200 msecs
[Fri Apr 3 14:55:54 2020] usb 1-1.2: dvb_usb_v2: ‘Realtek RTL2832U reference design’ successfully initialized and connected
[Fri Apr 3 14:55:54 2020] usbcore: registered new interface driver dvb_usb_rtl28xxu
[Fri Apr 3 14:55:54 2020] cfg80211: Loaded X.509 cert ‘sforshee: 00b28ddf47aef9cea7’
[Fri Apr 3 14:55:54 2020] brcmfmac: F1 signature read @0x18000000=0x1541a9a6
[Fri Apr 3 14:55:54 2020] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1
[Fri Apr 3 14:55:54 2020] usbcore: registered new interface driver brcmfmac
[Fri Apr 3 14:55:54 2020] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1
[Fri Apr 3 14:55:54 2020] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available
[Fri Apr 3 14:55:54 2020] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43430/1 wl0: Oct 22 2019 01:59:28 version 7.45.98.94 (r723000 CY) FWID 01-3b33decd
[Fri Apr 3 14:55:55 2020] random: crng init done
[Fri Apr 3 14:55:55 2020] random: 7 urandom warning(s) missed due to ratelimiting
[Fri Apr 3 14:55:56 2020] uart-pl011 3f201000.serial: no DMA platform data
[Fri Apr 3 14:55:57 2020] 8021q: 802.1Q VLAN Support v1.8
[Fri Apr 3 14:55:57 2020] Adding 102396k swap on /var/swap. Priority:-2 extents:1 across:102396k SSFS
[Fri Apr 3 14:55:57 2020] usbcore: deregistering interface driver dvb_usb_rtl28xxu
[Fri Apr 3 14:55:57 2020] r820t 4-001a: destroying instance
[Fri Apr 3 14:55:57 2020] dvb_usb_v2: ‘Realtek RTL2832U reference design:1-1.2’ successfully deinitialized and disconnected
[Fri Apr 3 14:55:57 2020] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[Fri Apr 3 14:55:57 2020] brcmfmac: power management disabled
[Fri Apr 3 14:55:58 2020] smsc95xx 1-1.1:1.0 eth0: hardware isn’t capable of remote wakeup
[Fri Apr 3 14:55:58 2020] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[Fri Apr 3 14:55:59 2020] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[Fri Apr 3 14:56:00 2020] ICMPv6: process `dhcpcd’ is using deprecated sysctl (syscall) net.ipv6.neigh.wlan0.retrans_time - use net.ipv6.neigh.wlan0.retrans_time_ms instead
[Fri Apr 3 14:56:02 2020] Bluetooth: Core ver 2.22
[Fri Apr 3 14:56:02 2020] NET: Registered protocol family 31
[Fri Apr 3 14:56:02 2020] Bluetooth: HCI device and connection manager initialized
[Fri Apr 3 14:56:02 2020] Bluetooth: HCI socket layer initialized
[Fri Apr 3 14:56:02 2020] Bluetooth: L2CAP socket layer initialized
[Fri Apr 3 14:56:02 2020] Bluetooth: SCO socket layer initialized
[Fri Apr 3 14:56:02 2020] Bluetooth: HCI UART driver ver 2.3
[Fri Apr 3 14:56:02 2020] Bluetooth: HCI UART protocol H4 registered
[Fri Apr 3 14:56:02 2020] Bluetooth: HCI UART protocol Three-wire (H5) registered
[Fri Apr 3 14:56:02 2020] Bluetooth: HCI UART protocol Broadcom registered
[Fri Apr 3 14:56:02 2020] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[Fri Apr 3 14:56:02 2020] Bluetooth: BNEP filters: protocol multicast
[Fri Apr 3 14:56:02 2020] Bluetooth: BNEP socket layer initialized
[Fri Apr 3 14:56:02 2020] Bluetooth: RFCOMM TTY layer initialized
[Fri Apr 3 14:56:02 2020] Bluetooth: RFCOMM socket layer initialized
[Fri Apr 3 14:56:02 2020] Bluetooth: RFCOMM ver 1.11
[Fri Apr 3 14:56:03 2020] fuse init (API version 7.27)

That’s not the complete command is it?

No matter, doesn’t look like voltage drops.

Next time it’s no longer working check the log for dump1090-fa

sudo journalctl --no-pager -u dump1090-fa

Checking if there was a voltage drop also doesn’t hurt?
Are you using an USB extension to connect the SDR?

When I input the entire command sudo dmesg --ctime | grep voltage I just get a return prompt?

I will check the command when / if it craps out again. I’m wondering if WiFi signal strength is an issue?

I am not using an extension cable. The receiver is plugged directly into the Pi…

grep looks for the text you put after it, and only prints those lines which contain it. If you just get a command prompt it means that none of the lines of the input text contain that phrase. It saves having to hunt through a big text output to find what you are looking for.

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OK thank you for the explanation !

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