在我告诉你这个故事之前，请注意，我搜索了所有主题并按照大部分提示操作，但我仍然遇到这个问题，并且没有任何改变。
我的 Ubuntu 上的 WiFi 信号非常弱。下面是有关我的系统的一些信息。请帮助我通过 Ubuntu 上的 WiFi 访问 WWW。
无线适配器0bda:b720 Realtek Semiconductor Corp.内部连接到 USB。
iwconfig
wlx88835d5256de IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
lo no wireless extensions.
model name : Intel(R) Celeron(R) CPU N3350 @ 1.10GHz
model name : Intel(R) Celeron(R) CPU N3350 @ 1.10GHz
description: Motherboard
product: A116CV20
vendor: HOMETECH
physical id: 0
version: .B002
*-firmware:0
lspci -knn
00:00.0 Host bridge [0600]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Host Bridge [8086:5af0] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Host Bridge [8086:7270]
00:00.1 Signal processing controller [1180]: Intel Corporation Device [8086:5a8c] (rev 0b)
Kernel driver in use: proc_thermal
Kernel modules: processor_thermal_device
00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:5a85] (rev 0b)
Subsystem: Intel Corporation Device [8086:2212]
Kernel driver in use: i915
Kernel modules: i915
00:03.0 Multimedia controller [0480]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Imaging Unit [8086:5a88] (rev 0b)
00:0e.0 Multimedia audio controller [0401]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Audio Cluster [8086:5a98] (rev 0b)
Subsystem: Realtek Semiconductor Co., Ltd. Celeron N3350/Pentium N4200/Atom E3900 Series Audio Cluster [10ec:111a]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel, snd_soc_skl
00:0f.0 Communication controller [0780]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Trusted Execution Engine [8086:5a9a] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Trusted Execution Engine [8086:7270]
Kernel driver in use: mei_me
Kernel modules: mei_me
00:12.0 SATA controller [0106]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SATA AHCI Controller [8086:5ae3] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SATA AHCI Controller [8086:7270]
Kernel driver in use: ahci
Kernel modules: ahci
00:14.0 PCI bridge [0604]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series PCI Express Port B #1 [8086:5ad6] (rev fb)
Kernel driver in use: pcieport
00:14.1 PCI bridge [0604]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series PCI Express Port B #2 [8086:5ad7] (rev fb)
Kernel driver in use: pcieport
00:15.0 USB controller [0c03]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series USB xHCI [8086:5aa8] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series USB xHCI [8086:7270]
Kernel driver in use: xhci_hcd
00:16.0 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #1 [8086:5aac] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.1 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #2 [8086:5aae] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.2 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #3 [8086:5ab0] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.3 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #4 [8086:5ab2] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:17.0 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #5 [8086:5ab4] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:17.1 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #6 [8086:5ab6] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:17.2 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #7 [8086:5ab8] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:17.3 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #8 [8086:5aba] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:18.0 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #1 [8086:5abc] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:18.1 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #2 [8086:5abe] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:18.2 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #3 [8086:5ac0] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller [8086:7270]
Kernel modules: intel_lpss_pci
00:18.3 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #4 [8086:5aee] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:19.0 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #1 [8086:5ac2] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:19.1 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #2 [8086:5ac4] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:19.2 Signal processing controller [1180]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #3 [8086:5ac6] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller [8086:7270]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:1b.0 SD Host controller [0805]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDXC/MMC Host Controller [8086:5aca] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDXC/MMC Host Controller [8086:7270]
Kernel driver in use: sdhci-pci
Kernel modules: sdhci_pci
00:1c.0 SD Host controller [0805]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series eMMC Controller [8086:5acc] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series eMMC Controller [8086:7270]
Kernel driver in use: sdhci-pci
Kernel modules: sdhci_pci
00:1e.0 SD Host controller [0805]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDIO Controller [8086:5ad0] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDIO Controller [8086:7270]
Kernel driver in use: sdhci-pci
Kernel modules: sdhci_pci
00:1f.0 ISA bridge [0601]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Low Pin Count Interface [8086:5ae8] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Low Pin Count Interface [8086:7270]
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.1 SMBus [0c05]: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SMBus Controller [8086:5ad4] (rev 0b)
Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SMBus Controller [8086:7270]
Kernel modules: i2c_i801
系统盘
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 1908:2311 GEMBIRD
Bus 001 Device 005: ID 0bda:b720 Realtek Semiconductor Corp.
Bus 001 Device 004: ID 145f:01d2 Trust
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 0bda:8152 Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub