几天前，我在笔记本电脑 [Acer Aspire E5-576] 上安装了 Ubuntu 22.04 LTS 和 Windows 10。我注意到，与 Windows 相比，使用 Ubuntu 时我的 WiFi 信号极低。我尝试了很多方法来解决这个问题：关闭电源管理、更新和降级内核版本等。（我目前使用的是 5.15.0-47 通用版）以及许多其他方法
iwconfig（路由器就在笔记本电脑前面）：
lo no wireless extensions.
enp4s0f1 no wireless extensions.
wlp3s0 IEEE 802.11 ESSID:"\xD9\x8A\xD9\x85 \xD8\xA7\xD9\x8A\xD8\xA8\xD8\xB3\xD9\x88\xD9\x85 \xD9\x87\xD9\x88 \xD9\x86\xD9\x85\xD9\x88\xD8\xB0"
Mode:Managed Frequency:2.437 GHz Access Point: 66:7B:9D:70:C6:F5
Bit Rate=1 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=43/70 Signal level=-67 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:93 Missed beacon:0
lsmod：
Module Size Used by
rfcomm 81920 4
ccm 20480 9
cmac 16384 4
algif_hash 16384 1
algif_skcipher 16384 1
af_alg 32768 6 algif_hash,algif_skcipher
bnep 28672 2
nls_iso8859_1 16384 1
snd_soc_skl 172032 0
snd_soc_hdac_hda 24576 1 snd_soc_skl
snd_hda_ext_core 32768 2 snd_soc_hdac_hda,snd_soc_skl
snd_soc_sst_ipc 20480 1 snd_soc_skl
snd_soc_sst_dsp 36864 1 snd_soc_skl
snd_soc_acpi_intel_match 61440 1 snd_soc_skl
snd_soc_acpi 16384 2 snd_soc_acpi_intel_match,snd_soc_skl
snd_soc_core 339968 2 snd_soc_hdac_hda,snd_soc_skl
snd_compress 24576 1 snd_soc_core
ac97_bus 16384 1 snd_soc_core
snd_pcm_dmaengine 16384 1 snd_soc_core
snd_hda_codec_hdmi 77824 1
snd_ctl_led 24576 0
snd_hda_codec_realtek 159744 1
snd_hda_codec_generic 102400 1 snd_hda_codec_realtek
ledtrig_audio 16384 2 snd_ctl_led,snd_hda_codec_generic
intel_rapl_msr 20480 0
intel_rapl_common 40960 1 intel_rapl_msr
snd_hda_intel 53248 5
snd_intel_dspcfg 28672 2 snd_hda_intel,snd_soc_skl
snd_intel_sdw_acpi 20480 1 snd_intel_dspcfg
snd_hda_codec 163840 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda
intel_tcc_cooling 16384 0
x86_pkg_temp_thermal 20480 0
intel_powerclamp 20480 0
snd_hda_core 110592 8 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_soc_hdac_hda,snd_soc_skl
coretemp 24576 0
ath10k_pci 49152 0
ath10k_core 602112 1 ath10k_pci
btusb 61440 0
ath 36864 1 ath10k_core
mac80211 1253376 1 ath10k_core
snd_hwdep 16384 1 snd_hda_codec
kvm_intel 372736 0
btrtl 24576 1 btusb
btbcm 24576 1 btusb
snd_pcm 143360 9 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_compress,snd_soc_core,snd_soc_skl,snd_hda_core,snd_pcm_dmaengine
uvcvideo 106496 0
cfg80211 974848 3 ath,mac80211,ath10k_core
btintel 40960 1 btusb
snd_seq_midi 20480 0
snd_seq_midi_event 16384 1 snd_seq_midi
videobuf2_vmalloc 20480 1 uvcvideo
videobuf2_memops 20480 1 videobuf2_vmalloc
videobuf2_v4l2 32768 1 uvcvideo
kvm 1028096 1 kvm_intel
libarc4 16384 1 mac80211
snd_rawmidi 49152 1 snd_seq_midi
bluetooth 704512 33 btrtl,btintel,btbcm,bnep,btusb,rfcomm
mei_hdcp 24576 0
videobuf2_common 77824 4 videobuf2_vmalloc,videobuf2_v4l2,uvcvideo,videobuf2_memops
snd_seq 77824 2 snd_seq_midi,snd_seq_midi_event
videodev 258048 3 videobuf2_v4l2,uvcvideo,videobuf2_common
crct10dif_pclmul 16384 1
mc 65536 4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
ghash_clmulni_intel 16384 0
ecdh_generic 16384 1 bluetooth
ecc 36864 1 ecdh_generic
nouveau 2306048 0
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
aesni_intel 376832 11
i915 3104768 22
snd_timer 40960 2 snd_seq,snd_pcm
crypto_simd 16384 1 aesni_intel
mxm_wmi 16384 1 nouveau
drm_ttm_helper 16384 1 nouveau
ttm 86016 3 drm_ttm_helper,i915,nouveau
cryptd 24576 3 crypto_simd,ghash_clmulni_intel
drm_kms_helper 311296 2 i915,nouveau
cec 61440 2 drm_kms_helper,i915
rapl 20480 0
acer_wmi 28672 0
intel_cstate 20480 0
rc_core 65536 1 cec
mei_me 40960 1
snd 106496 23 snd_ctl_led,snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_rawmidi
soundcore 16384 2 snd_ctl_led,snd
intel_xhci_usb_role_switch 16384 0
intel_pch_thermal 20480 0
joydev 32768 0
input_leds 16384 0
mac_hid 16384 0
i2c_algo_bit 16384 2 i915,nouveau
serio_raw 20480 0
sparse_keymap 16384 1 acer_wmi
fb_sys_fops 16384 1 drm_kms_helper
syscopyarea 16384 1 drm_kms_helper
sysfillrect 20480 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
mei 135168 3 mei_hdcp,mei_me
acpi_pad 184320 0
acer_wireless 20480 0
intel_wmi_thunderbolt 20480 0
wmi_bmof 16384 0
sch_fq_codel 20480 2
ipmi_devintf 20480 0
ipmi_msghandler 122880 1 ipmi_devintf
msr 16384 0
parport_pc 49152 0
ppdev 24576 0
mtd 77824 0
lp 28672 0
drm 622592 13 drm_kms_helper,drm_ttm_helper,i915,ttm,nouveau
parport 69632 3 parport_pc,lp,ppdev
pstore_blk 16384 0
ramoops 32768 0
pstore_zone 32768 1 pstore_blk
efi_pstore 16384 0
reed_solomon 28672 1 ramoops
ip_tables 32768 0
x_tables 53248 1 ip_tables
autofs4 49152 2
rtsx_pci_sdmmc 32768 0
crc32_pclmul 16384 0
psmouse 176128 0
r8168 552960 0
i2c_i801 36864 0
i2c_smbus 20480 1 i2c_i801
rtsx_pci 106496 1 rtsx_pci_sdmmc
intel_lpss_pci 24576 0
intel_lpss 16384 1 intel_lpss_pci
ahci 45056 2
libahci 45056 1 ahci
xhci_pci 24576 0
idma64 20480 0
xhci_pci_renesas 20480 1 xhci_pci
video 61440 3 acer_wmi,i915,nouveau
wmi 32768 5 intel_wmi_thunderbolt,acer_wmi,wmi_bmof,mxm_wmi,nouveau
lspci：
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1)
00:1d.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #11 (rev f1)
00:1d.3 PCI bridge: Intel Corporation Device 9d1b (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
01:00.0 3D controller: NVIDIA Corporation GM108M [GeForce MX130] (rev a2)
03:00.0 Network controller: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter (rev 31)
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8411B PCI Express Card Reader (rev 01)
04:00.1 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 12)