我有一个 Raspberry 3 Model B，它有一个 BCM43438 无线 LAN 和蓝牙低功耗 (BLE)，并且最近安装了 Ubuntu 20.04 LTS。提前感谢您查看并让我知道 RPI3 上的 Ubuntu 20.04 目前是否不支持 wifi。
我读过一些帖子说寻找 /etc/network/interfaces 文件，但我的计算机上没有这样的文件：
ubuntu@ubuntu:/etc/network$ ls -laFioh
total 32K
767 drwxr-xr-x 6 root 4.0K Dec 3 16:18 ./
59 drwxr-xr-x 115 root 12K May 24 00:54 ../
768 drwxr-xr-x 2 root 4.0K May 23 22:57 if-down.d/
770 drwxr-xr-x 2 root 4.0K May 24 00:20 if-post-down.d/
772 drwxr-xr-x 2 root 4.0K May 24 00:20 if-pre-up.d/
775 drwxr-xr-x 2 root 4.0K May 23 23:08 if-up.d/
查询硬件时，我得到以下信息：
ubuntu@ubuntu:~$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.10.243 netmask 255.255.255.0 broadcast 10.0.10.255
inet6 2600:8802:5700:4e9::17ef prefixlen 128 scopeid 0x0<global>
inet6 fe80::ba27:ebff:fe9e:342b prefixlen 64 scopeid 0x20<link>
inet6 2600:8802:5700:4e9:ba27:ebff:fe9e:342b prefixlen 64 scopeid 0x0<global>
ether b8:27:eb:9e:34:2b txqueuelen 1000 (Ethernet)
RX packets 12903 bytes 3076937 (3.0 MB)
RX errors 0 dropped 1448 overruns 0 frame 0
TX packets 4753 bytes 1548962 (1.5 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 360 bytes 27732 (27.7 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 360 bytes 27732 (27.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ubuntu@ubuntu:~$ iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
这是（针对帖子长度进行了编辑）dmesg：
ubuntu@ubuntu:/etc/network/if-up.d$ ifconfig -a | dmesg
[ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034]
[ 0.000000] Linux version 5.4.0-1011-raspi (buildd@bos02-arm64-055) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)) #11-Ubuntu SMP Fri May 8 07:43:33 UTC 2020 (Ubuntu 5.4.0-1011.11-raspi 5.4.34)
[ 0.000000] Machine model: Raspberry Pi 3 Model B Rev 1.2
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: UEFI not found.
[ 0.000000] Reserved memory: created CMA memory pool at 0x0000000037400000, size 64 MiB
[ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[ 0.000000] On node 0 totalpages: 242688
[ 0.000000] DMA zone: 3792 pages used for memmap
[ 0.000000] DMA zone: 0 pages reserved
[ 0.000000] DMA zone: 242688 pages, LIFO batch:63
[ 0.000000] percpu: Embedded 32 pages/cpu s92120 r8192 d30760 u131072
[ 0.000000] pcpu-alloc: s92120 r8192 d30760 u131072 alloc=32*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Detected VIPT I-cache on CPU0
[ 0.000000] CPU features: detected: ARM erratum 845719
[ 0.000000] CPU features: kernel page table isolation forced ON by KASLR
[ 0.000000] CPU features: detected: Kernel page table isolation (KPTI)
[ 0.000000] CPU features: detected: ARM erratum 843419
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 238896
[ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=1 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:9E:34:2B vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 net.ifnames=0 dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=LABEL=writable rootfstype=ext4 elevator=deadline rootwait fixrtc quiet splash
[ 0.000000] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 829544K/970752K available (11772K kernel code, 1234K rwdata, 4232K rodata, 6144K init, 1070K bss, 75672K reserved, 65536K cma-reserved)
[ 0.000000] random: get_random_u64 called from kmem_cache_open+0x38/0x3e0 with crng_init=0
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] ftrace: allocating 38918 entries in 153 pages
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] Tasks RCU enabled.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
[ 0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
[ 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
[ 0.000006] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
[ 0.000259] Console: colour dummy device 80x25
[ 0.000286] printk: console [tty1] enabled
[ 0.000346] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=76800)
[ 0.000365] pid_max: default: 32768 minimum: 301
[ 0.000675] LSM: Security Framework initializing
[ 0.000740] Yama: becoming mindful.
[ 0.000870] AppArmor: AppArmor initialized
[ 0.001143] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes, linear)
[ 0.001174] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes, linear)
[ 0.001272] *** VALIDATE tmpfs ***
[ 0.002123] *** VALIDATE proc ***
[ 0.002726] Disabling memory control group subsystem
[ 0.002810] *** VALIDATE cgroup1 ***
[ 0.002824] *** VALIDATE cgroup2 ***
[ 0.004609] ASID allocator initialised with 32768 entries
[ 0.004842] rcu: Hierarchical SRCU implementation.
[ 0.007381] EFI services will not be available.
[ 0.008566] smp: Bringing up secondary CPUs ...
[ 0.009828] Detected VIPT I-cache on CPU1
[ 0.009895] CPU1: Booted secondary processor 0x0000000001 [0x410fd034]
[ 0.011639] Detected VIPT I-cache on CPU2
[ 0.011687] CPU2: Booted secondary processor 0x0000000002 [0x410fd034]
[ 0.013379] Detected VIPT I-cache on CPU3
[ 0.013424] CPU3: Booted secondary processor 0x0000000003 [0x410fd034]
[ 0.013911] smp: Brought up 1 node, 4 CPUs
[ 0.013923] SMP: Total of 4 processors activated.
[ 0.013936] CPU features: detected: 32-bit EL0 Support
[ 0.013949] CPU features: detected: CRC32 instructions
[ 0.020184] CPU features: emulated: Privileged Access Never (PAN) using TTBR0_EL1 switching
[ 0.020196] CPU: All CPU(s) started at EL2
[ 0.020299] alternatives: patching kernel code
[ 0.022694] devtmpfs: initialized
[ 0.037343] Enabled cp15_barrier support
[ 0.037374] Enabled setend support
[ 0.038045] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.038073] futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
[ 0.041727] pinctrl core: initialized pinctrl subsystem
[ 0.042605] DMI not present or invalid.
[ 0.043595] NET: Registered protocol family 16
[ 0.051797] DMA: preallocated 1024 KiB pool for atomic allocations
[ 0.051833] audit: initializing netlink subsys (disabled)
[ 0.052166] audit: type=2000 audit(0.048:1): state=initialized audit_enabled=0 res=1
[ 0.053055] cpuidle: using governor ladder
[ 0.053107] cpuidle: using governor menu
[ 0.053801] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[ 0.054258] Serial: AMBA PL011 UART driver
[ 0.057099] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
[ 0.072352] raspberrypi-firmware soc:firmware: Attached to firmware from 2020-02-12 12:38, variant start
[ 0.076366] raspberrypi-firmware soc:firmware: Firmware hash is 53a54c770c493957d99bf49762dfabc4eee00e45
[ 0.141228] bcm2835-dma 3f007000.dma: DMA legacy API manager, dmachans=0x1
[ 0.144632] iommu: Default domain type: Translated
[ 0.146755] SCSI subsystem initialized
[ 0.147103] libata version 3.00 loaded.
[ 0.147383] usbcore: registered new interface driver usbfs
[ 0.147442] usbcore: registered new interface driver hub
[ 0.147573] usbcore: registered new device driver usb
[ 0.148025] pps_core: LinuxPPS API ver. 1 registered
[ 0.148035] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.148061] PTP clock support registered
[ 0.148431] EDAC MC: Ver: 3.0.0
[ 0.150257] NetLabel: Initializing
[ 0.150269] NetLabel: domain hash size = 128
[ 0.150277] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 0.150375] NetLabel: unlabeled traffic allowed by default
[ 0.151661] clocksource: Switched to clocksource arch_sys_counter
[ 0.273752] *** VALIDATE bpf ***
[ 0.274312] VFS: Disk quotas dquot_6.6.0
[ 0.274440] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.274605] *** VALIDATE ramfs ***
[ 0.275419] AppArmor: AppArmor Filesystem Enabled
[ 0.275758] simple-framebuffer 3eaf0000.framebuffer: framebuffer at 0x3eaf0000, 0x10a800 bytes, mapped to 0x(____ptrval____)
[ 0.275776] simple-framebuffer 3eaf0000.framebuffer: format=a8r8g8b8, mode=656x416x32, linelength=2624
[ 0.276413] Console: switching to colour frame buffer device 82x26
[ 0.281022] simple-framebuffer 3eaf0000.framebuffer: fb0: simplefb registered!
[ 0.295933] tcp_listen_portaddr_hash hash table entries: 512 (order: 1, 8192 bytes, linear)
[ 0.295977] TCP established hash table entries: 8192 (order: 4, 65536 bytes, linear)
[ 0.296094] TCP bind hash table entries: 8192 (order: 5, 131072 bytes, linear)
[ 0.296289] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.296548] UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 0.296601] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 0.296928] NET: Registered protocol family 1
[ 0.296963] NET: Registered protocol family 44
[ 0.296984] PCI: CLS 0 bytes, default 64
[ 0.297351] Trying to unpack rootfs image as initramfs...
[ 1.310272] Freeing initrd memory: 28784K
[ 1.312081] hw perfevents: enabled with armv8_cortex_a53 PMU driver, 7 counters available
[ 1.312256] kvm [1]: IPA Size Limit: 40bits
[ 1.313553] kvm [1]: Hyp mode initialized successfully
[ 1.317894] Initialise system trusted keyrings
[ 1.317956] Key type blacklist registered
[ 1.318274] workingset: timestamp_bits=46 max_order=18 bucket_order=0
[ 1.328818] zbud: loaded
[ 1.331807] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 1.333293] fuse: init (API version 7.31)
[ 1.333464] *** VALIDATE fuse ***
[ 1.333481] *** VALIDATE fuse ***
[ 1.373876] Key type asymmetric registered
[ 1.373892] Asymmetric key parser 'x509' registered
[ 1.373983] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 243)
[ 1.374368] io scheduler mq-deadline registered
[ 1.380355] bcm2708_fb soc:fb: FB found 1 display(s)
[ 1.385548] bcm2708_fb soc:fb: Registered framebuffer for display 0, size 656x416
[ 1.469838] Serial: 8250/16550 driver, 1 ports, IRQ sharing enabled
[ 1.472384] bcm2835-rng 3f104000.rng: hwrng registered
[ 1.473038] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
[ 1.474044] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[ 1.474439] cacheinfo: Unable to detect cache hierarchy for CPU 0
[ 1.966042] loop: module loaded
[ 1.969071] spi-bcm2835 3f204000.spi: could not get clk: -517
[ 1.971483] libphy: Fixed MDIO Bus: probed
[ 1.971531] tun: Universal TUN/TAP device driver, 1.6
[ 1.972035] PPP generic driver version 2.4.2
[ 1.972336] usbcore: registered new interface driver lan78xx
[ 1.972411] usbcore: registered new interface driver smsc95xx
[ 1.972453] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.972482] ehci-pci: EHCI PCI platform driver
[ 1.972547] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.972582] ohci-pci: OHCI PCI platform driver
[ 1.972634] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.972831] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 2.186906] Core Release: 2.80a
[ 2.186920] Setting default values for core params
[ 2.186949] Finished setting default values for core params
[ 2.400133] Using Buffer DMA mode
[ 2.400144] Periodic Transfer Interrupt Enhancement - disabled
[ 2.400153] Multiprocessor Interrupt Enhancement - disabled
[ 2.400165] OTG VER PARAM: 0, OTG VER FLAG: 0
[ 2.400184] Dedicated Tx FIFOs mode
[ 2.401079] WARN::dwc_otg_hcd_init:1072: FIQ DMA bounce buffers: virt = ffff800010556000 dma = 0x00000000f7510000 len=9024
[ 2.401109] FIQ FSM acceleration enabled for :
Non-periodic Split Transactions
Periodic Split Transactions
High-Speed Isochronous Endpoints
Interrupt/Control Split Transaction hack enabled
[ 2.401120] dwc_otg: Microframe scheduler enabled
[ 2.401162] WARN::hcd_init_fiq:496: MPHI regs_base at ffff80001007d000
[ 2.401231] dwc_otg 3f980000.usb: DWC OTG Controller
[ 2.401266] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
[ 2.401332] dwc_otg 3f980000.usb: irq 9, io mem 0x00000000
[ 2.401384] Init: Port Power? op_state=1
[ 2.401393] Init: Power Port (0)
[ 2.401774] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04
[ 2.401790] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.401804] usb usb1: Product: DWC OTG Controller
[ 2.401818] usb usb1: Manufacturer: Linux 5.4.0-1011-raspi dwc_otg_hcd
[ 2.401831] usb usb1: SerialNumber: 3f980000.usb
[ 2.402670] hub 1-0:1.0: USB hub found
[ 2.402738] hub 1-0:1.0: 1 port detected
[ 2.403580] dwc_otg: FIQ enabled
[ 2.403590] dwc_otg: NAK holdoff enabled
[ 2.403599] dwc_otg: FIQ split-transaction FSM enabled
[ 2.403614] Module dwc_common_port init
[ 2.404408] mousedev: PS/2 mouse device common for all mice
[ 2.404996] i2c /dev entries driver
[ 2.408010] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
[ 2.408297] device-mapper: uevent: version 1.0.3
[ 2.408713] device-mapper: ioctl: 4.41.0-ioctl (2019-09-16) initialised: dm-devel@redhat.com
[ 2.408963] bcm2835-cpufreq: min=600000 max=1200000
[ 2.411208] sdhci: Secure Digital Host Controller Interface driver
[ 2.411213] sdhci: Copyright(c) Pierre Ossman
[ 2.411577] mmc-bcm2835 3f300000.mmcnr: could not get clk, deferring probe
[ 2.411939] sdhost-bcm2835 3f202000.mmc: could not get clk, deferring probe
[ 2.412049] sdhci-pltfm: SDHCI platform and OF driver helper
[ 2.414057] ledtrig-cpu: registered to indicate activity on CPUs
[ 2.414194] hidraw: raw HID events driver (C) Jiri Kosina
[ 2.414991] vchiq: vchiq_init_state: slot_zero = (____ptrval____)
[ 2.418173] drop_monitor: Initializing network drop monitor service
[ 2.418914] NET: Registered protocol family 10
[ 2.460979] Segment Routing with IPv6
[ 2.461071] NET: Registered protocol family 17
[ 2.461278] Key type dns_resolver registered
[ 2.461876] registered taskstats version 1
[ 2.461932] Loading compiled-in X.509 certificates
[ 2.471617] Loaded X.509 cert 'Build time autogenerated kernel key: 2b0c993598f9ffc45348fe691c2d17c0cab9b970'
[ 2.471798] zswap: loaded using pool lzo/zbud
[ 2.472116] Key type ._fscrypt registered
[ 2.472121] Key type .fscrypt registered
[ 2.501207] cryptd: max_cpu_qlen set to 1000
[ 2.607939] Indeed it is in host mode hprt0 = 00021501
[ 2.693627] random: fast init done
[ 2.710992] Key type big_key registered
[ 2.762921] Key type encrypted registered
[ 2.762951] AppArmor: AppArmor sha1 policy hashing enabled
[ 2.762984] ima: No TPM chip found, activating TPM-bypass!
[ 2.763014] ima: Allocated hash algorithm: sha1
[ 2.763042] ima: No architecture policies found
[ 2.772506] printk: console [ttyS0] disabled
[ 2.772557] 3f215040.serial: ttyS0 at MMIO 0x0 (irq = 61, base_baud = 31250000) is a 16550
[ 2.778456] printk: console [ttyS0] enabled
[ 2.779024] bcm2835-power bcm2835-power: Broadcom BCM2835 power domains driver
[ 2.782201] mmc-bcm2835 3f300000.mmcnr: mmc_debug:0 mmc_debug2:0
[ 2.782211] mmc-bcm2835 3f300000.mmcnr: DMA channel allocated
[ 2.799679] usb 1-1: new high-speed USB device number 2 using dwc_otg
[ 2.808101] sdhost: log_buf @ (____ptrval____) (ebcc4000)
[ 2.829576] usb 1-1: New USB device found, idVendor=0424, idProduct=9514, bcdDevice= 2.00
[ 2.829585] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.830092] hub 1-1:1.0: USB hub found
[ 2.830179] hub 1-1:1.0: 5 ports detected
[ 2.856496] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[ 2.858071] hctosys: unable to open rtc device (rtc0)
[ 2.858506] of_cfs_init
[ 2.858622] of_cfs_init: OK
[ 2.869359] Freeing unused kernel memory: 6144K
[ 2.877944] Checked W+X mappings: passed, no W+X pages found
[ 2.877955] Run /init as init process
[ 2.917209] mmc0: host does not support reading read-only switch, assuming write-enable
[ 2.920196] mmc0: new high speed SDHC card at address 0001
[ 2.921176] mmcblk0: mmc0:0001 SD32G 29.3 GiB (quirks 0x80000000)
[ 2.924046] mmcblk0: p1 p2
[ 2.969634] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[ 3.123722] usb 1-1.1: new high-speed USB device number 3 using dwc_otg
[ 3.144196] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00, bcdDevice= 2.00
[ 3.144210] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 3.147118] smsc95xx v1.0.6
[ 3.207434] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:9e:34:2b
[ 3.830336] usb_phy_generic phy: phy supply vcc not found, using dummy regulator
[ 3.940418] random: crng init done
[ 3.940425] random: 7 urandom warning(s) missed due to ratelimiting
[ 4.055733] mmc1: error -110 whilst initialising SDIO card
[ 8.055717] mmc1: error -110 whilst initialising SDIO card
[ 8.134713] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 9.259806] systemd[1]: System time before build time, advancing clock.
[ 9.353840] systemd[1]: Inserted module 'autofs4'
[ 9.465573] systemd[1]: systemd 245.4-4ubuntu3 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)
[ 9.466660] systemd[1]: Detected architecture arm64.
[ 9.560839] systemd[1]: Set hostname to <ubuntu>.
[ 10.939306] systemd[1]: /lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating /var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; please update the unit file accordingly.
[ 11.322186] systemd[1]: Created slice system-modprobe.slice.
[ 11.341802] systemd[1]: Listening on Network Service Netlink Socket.
[ 11.536895] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 11.556519] systemd[1]: Starting Apply Kernel Variables...
[ 11.564954] systemd[1]: modprobe@drm.service: Succeeded.
[ 11.567305] systemd[1]: Finished Load Kernel Module drm.
[ 11.571435] systemd[1]: Finished Remount Root and Kernel File Systems.
[ 11.573773] systemd[1]: Mounted Kernel Configuration File System.
[ 11.593020] systemd[1]: Condition check resulted in Rebuild Hardware Database being skipped.
[ 11.593308] systemd[1]: Condition check resulted in Platform Persistent Storage Archival being skipped.
[ 11.606500] systemd[1]: Starting Load/Save Random Seed...
[ 11.625818] systemd[1]: Starting Create System Users...
[ 11.634244] systemd[1]: Mounted FUSE Control File System.
[ 11.708756] systemd[1]: Finished Apply Kernel Variables.
[ 11.716806] systemd[1]: Finished Load/Save Random Seed.
[ 11.745901] systemd[1]: Finished Create System Users.
[ 11.765450] systemd[1]: Starting Create Static Device Nodes in /dev...
[ 11.853725] systemd[1]: Finished Create Static Device Nodes in /dev.
[ 11.872599] systemd[1]: Starting udev Kernel Device Manager...
[ 11.975918] systemd[1]: Finished Set the console keyboard layout.
[ 11.989425] systemd[1]: Finished Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling.
[ 12.130267] systemd[1]: Started udev Kernel Device Manager.
[ 12.295740] systemd[1]: Started Journal Service.
[ 12.331312] systemd-journald[699]: Received client request to flush runtime journal.
[ 12.338368] systemd-journald[699]: File /var/log/journal/3514f49f5a9540e08799a3236ffb69fb/system.journal corrupted or uncleanly shut down, renaming and replacing.
[ 15.447028] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[ 15.447847] vc_sm_cma: module verification failed: signature and/or required key missing - tainting kernel
[ 15.449312] bcm2835_vc_sm_cma_probe: Videocore shared memory driver
[ 15.449326] [vc_sm_connected_init]: start
[ 15.450053] [vc_sm_connected_init]: installed successfully
[ 15.483330] mc: Linux media interface: v0.10
[ 15.543700] videodev: Linux video capture interface: v2.00
[ 15.624819] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[ 15.647282] bcm2835_v4l2: module is from the staging directory, the quality is unknown, you have been warned.
[ 18.803843] alua: device handler registered
[ 18.809440] emc: device handler registered
[ 18.816655] rdac: device handler registered
[ 21.052015] audit: type=1400 audit(1585761833.787:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine" pid=1122 comm="apparmor_parser"
[ 21.052047] audit: type=1400 audit(1585761833.787:3): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1122 comm="apparmor_parser"
[ 21.071424] audit: type=1400 audit(1585761833.803:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="lsb_release" pid=1120 comm="apparmor_parser"
[ 21.075311] audit: type=1400 audit(1585761833.807:5): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/ippusbxd" pid=1121 comm="apparmor_parser"
[ 21.080322] audit: type=1400 audit(1585761833.815:6): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe" pid=1126 comm="apparmor_parser"
[ 21.080352] audit: type=1400 audit(1585761833.815:7): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe//kmod" pid=1126 comm="apparmor_parser"
[ 21.120841] audit: type=1400 audit(1585761833.855:8): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/tcpdump" pid=1127 comm="apparmor_parser"
[ 21.133913] audit: type=1400 audit(1585761833.867:9): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=1123 comm="apparmor_parser"
[ 21.133957] audit: type=1400 audit(1585761833.867:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-helper" pid=1123 comm="apparmor_parser"
[ 21.133976] audit: type=1400 audit(1585761833.867:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=1123 comm="apparmor_parser"
[ 29.389895] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[ 30.921666] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
[ 1503.818761] lp: driver loaded but no devices found
[ 1503.897593] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[ 1548.482170] lp: driver loaded but no devices found
[ 2134.819517] lp: driver loaded but no devices found
这是 hwinfo --short：
ubuntu@ubuntu:/etc/network/if-up.d$ sudo hwinfo --short
cpu:
CPU
CPU
CPU
CPU
network:
eth0 Standard Microsystems SMSC9512/9514 Fast Ethernet Adapter
network interface:
eth0 Ethernet network interface
lo Loopback network interface
disk:
/dev/mmcblk0 Disk
partition:
/dev/mmcblk0p1 Partition
/dev/mmcblk0p2 Partition
usb controller:
ARM USB controller
hub:
Linux Foundation 2.0 root hub
Standard Microsystems SMC9514 Hub
memory:
Main Memory
unknown:
PS/2 Controller