18.04_20.04一致出现偶尔上网断流现象，求解决

[deodar2006]

本机是：惠普EliteDesk 705 G1 MT
网卡信息：
ifconfig 检查结果
enp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.20.148 netmask 255.255.255.0 broadcast 192.168.20.255
inet6 fe80::5265:f3ff:fe25:d8bf prefixlen 64 scopeid 0x20<link>
ether 50:65:f3:25:d8:bf txqueuelen 1000 (以太网)
RX packets 36923 bytes 31027752 (31.0 MB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 32990 bytes 4827541 (4.8 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 18

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 (本地环回)
RX packets 4874 bytes 506332 (506.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4874 bytes 506332 (506.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

sudo lshw -class network
*-network
description: Ethernet interface
product: NetXtreme BCM5762 Gigabit Ethernet PCIe
vendor: Broadcom Inc. and subsidiaries
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 10
serial: 50:65:f3:25:d8:bf
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 duplex=full firmware=5762-v1.29 ip=192.168.20.148 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:18 memory:e2120000-e212ffff memory:e2110000-e211ffff memory:e2100000-e210ffff

不知道是网卡的驱动问题，还是系统其它方面的问题，一直没有解决，求各位兄弟姐妹帮忙看看？

[astolia]

出现问题后，运行dmesg，把结果发上来

[deodar2006]

出现问题后，运行dmesg，把结果发上来

1、
Dmesg 运行结果
[ 0.000000] Linux version 5.4.0-29-generic (buildd@lgw01-amd64-035) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)) #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 (Ubuntu 5.4.0-29.33-generic 5.4.30)
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic root=UUID=eaa76396-6fd5-46ab-9662-a1c301cbcd8c ro quiet splash vt.handoff=7
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Hygon HygonGenuine
[ 0.000000] Centaur CentaurHauls
[ 0.000000] zhaoxin Shanghai
[ 0.000000] random: get_random_u32 called from bsp_init_amd+0x217/0x2c0 with crng_init=0
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009ffff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000cbef6fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000cbef7000-0x00000000cbf26fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000cbf27000-0x00000000cbf3dfff] ACPI data
[ 0.000000] BIOS-e820: [mem 0x00000000cbf3e000-0x00000000cc2abfff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x00000000cc2ac000-0x00000000cdb83fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000cdb84000-0x00000000cdb84fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000cdb85000-0x00000000cdd8afff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x00000000cdd8b000-0x00000000cdee4fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000cdee5000-0x00000000cece5fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000cece6000-0x00000000ced26fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000ced27000-0x00000000ceff0fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000ceff1000-0x00000000ceffffff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fec10000-0x00000000fec10fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed00000-0x00000000fed00fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed40000-0x00000000fed44fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed80000-0x00000000fed8ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000ff800000-0x00000000ffffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000022effffff] usable
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] e820: update [mem 0x8a72e018-0x8a73ce57] usable ==> usable
[ 0.000000] e820: update [mem 0x8a72e018-0x8a73ce57] usable ==> usable
[ 0.000000] e820: update [mem 0x8a71d018-0x8a72de57] usable ==> usable
[ 0.000000] e820: update [mem 0x8a71d018-0x8a72de57] usable ==> usable
[ 0.000000] extended physical RAM map:
[ 0.000000] reserve setup_data: [mem 0x0000000000000000-0x000000000009ffff] usable
[ 0.000000] reserve setup_data: [mem 0x0000000000100000-0x000000008a71d017] usable
[ 0.000000] reserve setup_data: [mem 0x000000008a71d018-0x000000008a72de57] usable
[ 0.000000] reserve setup_data: [mem 0x000000008a72de58-0x000000008a72e017] usable
[ 0.000000] reserve setup_data: [mem 0x000000008a72e018-0x000000008a73ce57] usable
[ 0.000000] reserve setup_data: [mem 0x000000008a73ce58-0x00000000cbef6fff] usable
[ 0.000000] reserve setup_data: [mem 0x00000000cbef7000-0x00000000cbf26fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000cbf27000-0x00000000cbf3dfff] ACPI data
[ 0.000000] reserve setup_data: [mem 0x00000000cbf3e000-0x00000000cc2abfff] ACPI NVS
[ 0.000000] reserve setup_data: [mem 0x00000000cc2ac000-0x00000000cdb83fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000cdb84000-0x00000000cdb84fff] usable
[ 0.000000] reserve setup_data: [mem 0x00000000cdb85000-0x00000000cdd8afff] ACPI NVS
[ 0.000000] reserve setup_data: [mem 0x00000000cdd8b000-0x00000000cdee4fff] usable
[ 0.000000] reserve setup_data: [mem 0x00000000cdee5000-0x00000000cece5fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000cece6000-0x00000000ced26fff] usable
[ 0.000000] reserve setup_data: [mem 0x00000000ced27000-0x00000000ceff0fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000ceff1000-0x00000000ceffffff] usable
[ 0.000000] reserve setup_data: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000fec10000-0x00000000fec10fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000fed00000-0x00000000fed00fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000fed40000-0x00000000fed44fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000fed80000-0x00000000fed8ffff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000ff800000-0x00000000ffffffff] reserved
[ 0.000000] reserve setup_data: [mem 0x0000000100000000-0x000000022effffff] usable
[ 0.000000] efi: EFI v2.31 by American Megatrends
[ 0.000000] efi: ACPI=0xcbf2b000 ACPI 2.0=0xcbf2b000 SMBIOS=0xcdb43a98 MPS=0xf4d40
[ 0.000000] secureboot: Secure boot disabled
[ 0.000000] SMBIOS 2.8 present.
[ 0.000000] DMI: Hewlett-Packard HP EliteDesk 705 G1 MT/2215, BIOS L06 v01.17 12/11/2014
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 3792.837 MHz processor
[ 0.002223] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.002225] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.002232] last_pfn = 0x22f000 max_arch_pfn = 0x400000000
[ 0.002236] MTRR default type: uncachable
[ 0.002237] MTRR fixed ranges enabled:
[ 0.002238] 00000-9FFFF write-back
[ 0.002239] A0000-BFFFF write-through
[ 0.002240] C0000-D0FFF write-protect
[ 0.002240] D1000-DFFFF uncachable
[ 0.002241] E0000-FFFFF write-protect
[ 0.002242] MTRR variable ranges enabled:
[ 0.002243] 0 base 000000000000 mask FFFF80000000 write-back
[ 0.002244] 1 base 000080000000 mask FFFFC0000000 write-back
[ 0.002245] 2 base 0000C0000000 mask FFFFF0000000 write-back
[ 0.002246] 3 disabled
[ 0.002246] 4 disabled
[ 0.002247] 5 disabled
[ 0.002247] 6 disabled
[ 0.002248] 7 disabled
[ 0.002249] TOM2: 000000022f000000 aka 8944M
[ 0.002478] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.002565] e820: update [mem 0xd0000000-0xffffffff] usable ==> reserved
[ 0.002571] last_pfn = 0xcf000 max_arch_pfn = 0x400000000
[ 0.004496] found SMP MP-table at [mem 0x000f4d30-0x000f4d3f]
[ 0.004541] check: Scanning 1 areas for low memory corruption
[ 0.004547] Using GB pages for direct mapping
[ 0.004549] BRK [0x15f201000, 0x15f201fff] PGTABLE
[ 0.004551] BRK [0x15f202000, 0x15f202fff] PGTABLE
[ 0.004552] BRK [0x15f203000, 0x15f203fff] PGTABLE
[ 0.004592] BRK [0x15f204000, 0x15f204fff] PGTABLE
[ 0.004593] BRK [0x15f205000, 0x15f205fff] PGTABLE
[ 0.004791] BRK [0x15f206000, 0x15f206fff] PGTABLE
[ 0.004866] BRK [0x15f207000, 0x15f207fff] PGTABLE
[ 0.004982] BRK [0x15f208000, 0x15f208fff] PGTABLE
[ 0.005073] BRK [0x15f209000, 0x15f209fff] PGTABLE
[ 0.005075] BRK [0x15f20a000, 0x15f20afff] PGTABLE
[ 0.005187] BRK [0x15f20b000, 0x15f20bfff] PGTABLE
[ 0.005291] BRK [0x15f20c000, 0x15f20cfff] PGTABLE
[ 0.005390] secureboot: Secure boot disabled
[ 0.005391] RAMDISK: [mem 0x3a565000-0x3d490fff]
[ 0.005456] ACPI: Early table checksum verification disabled
[ 0.005460] ACPI: RSDP 0x00000000CBF2B000 000024 (v02 HPQOEM)
[ 0.005463] ACPI: XSDT 0x00000000CBF2B090 0000A4 (v01 HPQOEM SLIC-BPC 20141211 AMI 00010013)
[ 0.005470] ACPI: FACP 0x00000000CBF32C90 00010C (v05 HPQOEM SLIC-BPC 20141211 AMI 00010013)
[ 0.005475] ACPI BIOS Warning (bug): Optional FADT field Pm2ControlBlock has valid Length but zero Address: 0x0000000000000000/0x1 (20190816/tbfadt-615)
[ 0.005479] ACPI: DSDT 0x00000000CBF2B1C8 007AC1 (v02 HPQOEM SLIC-BPC 00000000 INTL 20051117)
[ 0.005482] ACPI: FACS 0x00000000CC2A1F80 000040
[ 0.005485] ACPI: APIC 0x00000000CBF32DA0 000072 (v03 HPQOEM SLIC-BPC 20141211 AMI 00010013)
[ 0.005487] ACPI: FPDT 0x00000000CBF32E18 000044 (v01 HPQOEM SLIC-BPC 20141211 AMI 00010013)
[ 0.005490] ACPI: FIDT 0x00000000CBF32E60 00009C (v01 HPQOEM SLIC-BPC 20141211 AMI 00010013)
[ 0.005493] ACPI: MCFG 0x00000000CBF32F00 00003C (v01 HPQOEM SLIC-BPC 20141211 MSFT 00010013)
[ 0.005495] ACPI: HPET 0x00000000CBF32F40 000038 (v01 HPQOEM SLIC-BPC 20141211 AMI 00000005)
[ 0.005498] ACPI: SSDT 0x00000000CBF32F78 00668F (v01 COMPAQ WMI 00000001 MSFT 03000001)
[ 0.005501] ACPI: SLIC 0x00000000CBF39608 000176 (v01 HPQOEM SLIC-BPC 00000001 00000000)
[ 0.005504] ACPI: UEFI 0x00000000CBF39780 000042 (v01 HPQOEM SLIC-BPC 20141211 00000000)
[ 0.005506] ACPI: IVRS 0x00000000CBF397C8 000068 (v02 AMD BANTRY 00000001 AMD 00000000)
[ 0.005509] ACPI: SSDT 0x00000000CBF39830 0006B2 (v01 AMD BANTRY 00000001 AMD 00000001)
[ 0.005512] ACPI: SSDT 0x00000000CBF39EE8 0004B7 (v02 AMD BANTRY 00000001 MSFT 04000000)
[ 0.005514] ACPI: CRAT 0x00000000CBF3A3A0 000310 (v01 AMD BANTRY 00000001 AMD 00000001)
[ 0.005516] ACPI: SSDT 0x00000000CBF3A6B0 00122C (v01 AMD CPMCMN 00000001 INTL 20051117)
[ 0.005519] ACPI: SSDT 0x00000000CBF3B8E0 000B52 (v01 AMD CPMDFDGP 00000001 INTL 20051117)
[ 0.005521] ACPI: SSDT 0x00000000CBF3C438 001757 (v01 AMD CPMDFIGP 00000001 INTL 20051117)
[ 0.005529] ACPI: Local APIC address 0xfee00000
[ 0.005649] No NUMA configuration found
[ 0.005649] Faking a node at [mem 0x0000000000000000-0x000000022effffff]
[ 0.005660] NODE_DATA(0) allocated [mem 0x22efd5000-0x22effffff]
[ 0.005894] Zone ranges:
[ 0.005895] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.005896] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.005897] Normal [mem 0x0000000100000000-0x000000022effffff]
[ 0.005898] Device empty
[ 0.005899] Movable zone start for each node
[ 0.005901] Early memory node ranges
[ 0.005902] node 0: [mem 0x0000000000001000-0x000000000009ffff]
[ 0.005903] node 0: [mem 0x0000000000100000-0x00000000cbef6fff]
[ 0.005904] node 0: [mem 0x00000000cdb84000-0x00000000cdb84fff]
[ 0.005905] node 0: [mem 0x00000000cdd8b000-0x00000000cdee4fff]
[ 0.005905] node 0: [mem 0x00000000cece6000-0x00000000ced26fff]
[ 0.005906] node 0: [mem 0x00000000ceff1000-0x00000000ceffffff]
[ 0.005906] node 0: [mem 0x0000000100000000-0x000000022effffff]
[ 0.006206] Zeroed struct page in unavailable ranges: 20415 pages
[ 0.006208] Initmem setup node 0 [mem 0x0000000000001000-0x000000022effffff]
[ 0.006210] On node 0 totalpages: 2076737
[ 0.006212] DMA zone: 64 pages used for memmap
[ 0.006212] DMA zone: 39 pages reserved
[ 0.006213] DMA zone: 3999 pages, LIFO batch:0
[ 0.006288] DMA32 zone: 12995 pages used for memmap
[ 0.006289] DMA32 zone: 831650 pages, LIFO batch:63
[ 0.021301] Normal zone: 19392 pages used for memmap
[ 0.021302] Normal zone: 1241088 pages, LIFO batch:63
[ 0.042802] ACPI: PM-Timer IO Port: 0x808
[ 0.042804] ACPI: Local APIC address 0xfee00000
[ 0.042812] ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
[ 0.042821] IOAPIC[0]: apic_id 0, version 33, address 0xfec00000, GSI 0-23
[ 0.042824] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.042825] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
[ 0.042827] ACPI: IRQ0 used by override.
[ 0.042828] ACPI: IRQ9 used by override.
[ 0.042830] Using ACPI (MADT) for SMP configuration information
[ 0.042831] ACPI: HPET id: 0x10228210 base: 0xfed00000
[ 0.042836] smpboot: Allowing 4 CPUs, 2 hotplug CPUs
[ 0.042861] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.042862] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[ 0.042864] PM: Registered nosave memory: [mem 0x8a71d000-0x8a71dfff]
[ 0.042865] PM: Registered nosave memory: [mem 0x8a72d000-0x8a72dfff]
[ 0.042866] PM: Registered nosave memory: [mem 0x8a72e000-0x8a72efff]
[ 0.042868] PM: Registered nosave memory: [mem 0x8a73c000-0x8a73cfff]
[ 0.042869] PM: Registered nosave memory: [mem 0xcbef7000-0xcbf26fff]
[ 0.042870] PM: Registered nosave memory: [mem 0xcbf27000-0xcbf3dfff]
[ 0.042870] PM: Registered nosave memory: [mem 0xcbf3e000-0xcc2abfff]
[ 0.042871] PM: Registered nosave memory: [mem 0xcc2ac000-0xcdb83fff]
[ 0.042872] PM: Registered nosave memory: [mem 0xcdb85000-0xcdd8afff]
[ 0.042874] PM: Registered nosave memory: [mem 0xcdee5000-0xcece5fff]
[ 0.042876] PM: Registered nosave memory: [mem 0xced27000-0xceff0fff]
[ 0.042877] PM: Registered nosave memory: [mem 0xcf000000-0xfebfffff]
[ 0.042878] PM: Registered nosave memory: [mem 0xfec00000-0xfec00fff]
[ 0.042878] PM: Registered nosave memory: [mem 0xfec01000-0xfec0ffff]
[ 0.042879] PM: Registered nosave memory: [mem 0xfec10000-0xfec10fff]
[ 0.042879] PM: Registered nosave memory: [mem 0xfec11000-0xfecfffff]
[ 0.042880] PM: Registered nosave memory: [mem 0xfed00000-0xfed00fff]
[ 0.042880] PM: Registered nosave memory: [mem 0xfed01000-0xfed3ffff]
[ 0.042881] PM: Registered nosave memory: [mem 0xfed40000-0xfed44fff]
[ 0.042881] PM: Registered nosave memory: [mem 0xfed45000-0xfed7ffff]
[ 0.042882] PM: Registered nosave memory: [mem 0xfed80000-0xfed8ffff]
[ 0.042882] PM: Registered nosave memory: [mem 0xfed90000-0xff7fffff]
[ 0.042882] PM: Registered nosave memory: [mem 0xff800000-0xffffffff]
[ 0.042884] [mem 0xcf0000