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Debian bookworm kde ではインターネットの速度が非常に遅いですが、Windows ではそうではありません。

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Debian bookworm kde ではインターネットの速度が非常に遅いですが、Windows ではそうではありません。

Windowsでは検索速度は非常に高速ですが、Debian Bookwormでは検索速度が本当に遅いです。多くのオンライン投稿を参照していますが、まだその理由を理解していません。

出力lsusb：

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 1bcf:2a02 Sunplus Innovation Technology Inc. Integrated_Webcam_HD
Bus 003 Device 003: ID 27c6:639c Shenzhen Goodix Technology Co.,Ltd. Goodix USB2.0 MISC
Bus 003 Device 005: ID 8087:0026 Intel Corp. AX201 Bluetooth
Bus 003 Device 002: ID 04ca:00ac Lite-On Technology Corp. Dell Wireless Device
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

出力dmesg | grep iwl：

[    2.568527] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[    2.572565] iwlwifi 0000:00:14.3: firmware: direct-loading firmware iwlwifi-QuZ-a0-hr-b0-72.ucode
[    2.572582] iwlwifi 0000:00:14.3: api flags index 2 larger than supported by driver
[    2.572599] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: 89.3.35.37
[    2.572948] iwlwifi 0000:00:14.3: firmware: failed to load iwl-debug-yoyo.bin (-2)
[    2.573082] iwlwifi 0000:00:14.3: firmware: failed to load iwl-debug-yoyo.bin (-2)
[    2.573100] iwlwifi 0000:00:14.3: loaded firmware version 72.daa05125.0 QuZ-a0-hr-b0-72.ucode op_mode iwlmvm
[    2.816789] iwlwifi 0000:00:14.3: Detected Intel(R) Wi-Fi 6 AX201 160MHz, REV=0x351
[    2.946843] iwlwifi 0000:00:14.3: Detected RF HR B3, rfid=0x10a100
[    3.012457] iwlwifi 0000:00:14.3: base HW address: 20:c1:9b:08:5e:62
[    3.029079] iwlwifi 0000:00:14.3 wlp0s20f3: renamed from wlan0
[   12.718460] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[   12.718635] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[   12.718831] iwlwifi 0000:00:14.3: Unhandled alg: 0x707

出力dmesg --level=emerg,crit,err,warn：

[    0.082714] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
[    0.370975] pnp 00:05: disabling [mem 0xc0000000-0xcfffffff] because it overlaps 0000:00:02.0 BAR 9 [mem 0x00000000-0xdfffffff 64bit pref]
[    0.664921] hpet_acpi_add: no address or irqs in _CRS
[    0.671343] i8042: Warning: Keylock active
[    0.916540] wmi_bus wmi_bus-PNP0C14:02: WQBC data block query control method not found
[    0.932482] pci 10000:e0:1c.4: Primary bus is hard wired to 0
[    0.933004] pci 10000:e0:1c.4: Primary bus is hard wired to 0
[    1.013738] usb: port power management may be unreliable
[    1.083995] pcieport 10000:e0:1c.4: can't derive routing for PCI INT A
[    1.083996] pcieport 10000:e0:1c.4: PCI INT A: no GSI
[    1.167666] pcieport 10000:e0:1c.4: can't derive routing for PCI INT A
[    1.167670] nvme 10000:e1:00.0: PCI INT A: not connected
[    2.197783] device-mapper: core: CONFIG_IMA_DISABLE_HTABLE is disabled. Duplicate IMA measurements will not be recorded in the IMA log.
[    2.489453] dell_smm_hwmon: unable to get SMM Dell signature
[    2.516777] resource sanity check: requesting [mem 0xfedc0000-0xfedcdfff], which spans more than pnp 00:05 [mem 0xfedc0000-0xfedc7fff]
[    2.516784] caller __uncore_imc_init_box+0xc4/0x120 [intel_uncore] mapping multiple BARs
[    2.572582] iwlwifi 0000:00:14.3: api flags index 2 larger than supported by driver
[    2.572948] iwlwifi 0000:00:14.3: firmware: failed to load iwl-debug-yoyo.bin (-2)
[    2.572968] firmware_class: See https://wiki.debian.org/Firmware for information about missing firmware
[    2.573082] iwlwifi 0000:00:14.3: firmware: failed to load iwl-debug-yoyo.bin (-2)
[    2.816875] thermal thermal_zone5: failed to read out thermal zone (-61)
[    3.160383] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: Parent card not yet available, widget card binding deferred
[    3.276770] snd_hda_codec_realtek ehdaudio0D0: ASoC: sink widget AIF1TX overwritten
[    3.276782] snd_hda_codec_realtek ehdaudio0D0: ASoC: source widget AIF1RX overwritten
[    3.276996] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: sink widget hifi3 overwritten
[    3.277004] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: sink widget hifi2 overwritten
[    3.277011] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: sink widget hifi1 overwritten
[    3.277018] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: source widget Codec Output Pin1 overwritten
[    3.277024] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: sink widget Codec Input Pin1 overwritten
[    3.277033] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: sink widget Analog Codec Playback overwritten
[    3.277041] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: sink widget Digital Codec Playback overwritten
[    3.277049] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: sink widget Alt Analog Codec Playback overwritten
[    3.277058] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: source widget Analog Codec Capture overwritten
[    3.277066] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: source widget Digital Codec Capture overwritten
[    3.277074] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: source widget Alt Analog Codec Capture overwritten
[    3.277093] skl_hda_dsp_generic skl_hda_dsp_generic: hda_dsp_hdmi_build_controls: no PCM in topology for HDMI converter 3
[    8.085738] kauditd_printk_skb: 26 callbacks suppressed
[   12.718460] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[   12.718635] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[   12.718831] iwlwifi 0000:00:14.3: Unhandled alg: 0x707

出力lsmod | grep rtl：

btrtl                  28672  1 btusb
bluetooth             954368  44 btrtl,btmtk,btintel,btbcm,bnep,btusb,rfcomm

出力iwconfig：

lo        no wireless extensions.

wlp0s20f3  IEEE 802.11  ESSID:"ZTE_2.4G_xGkTMR"  
          Mode:Managed  Frequency:5.2 GHz  Access Point: B8:DD:71:F7:1B:B8   
          Bit Rate=866.7 Mb/s   Tx-Power=22 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:on
          Link Quality=58/70  Signal level=-52 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:24   Missed beacon:0

docker0   no wireless extensions.

出力neofetch：

       _,met$$$$$gg.          krish@debian 
    ,g$$$$$$$$$$$$$$$P.       ------------ 
  ,g$$P"     """Y$$.".        OS: Debian GNU/Linux 12 (bookworm) x86_64 
 ,$$P'              `$$$.     Host: Inspiron 15 5518 
',$$P       ,ggs.     `$$b:   Kernel: 6.1.0-10-amd64 
`d$$'     ,$P"'   .    $$$    Uptime: 14 mins 
 $$P      d$'     ,    $$P    Packages: 2703 (dpkg), 18 (flatpak) 
 $$:      $$.   -    ,d$$'    Shell: bash 5.2.15 
 $$;      Y$b._   _,d$P'      Resolution: 1920x1080 
 Y$$.    `.`"Y$$$$P"'         DE: Plasma 5.27.5 
 `$$b      "-.__              WM: KWin 
  `Y$$                        Theme: [Plasma], Breeze [GTK3] 
   `Y$$.                      Icons: Win11-blue [Plasma], Win11-blue [GTK2/3] 
     `$$b.                    Terminal: konsole 
       `Y$$b.                 CPU: 11th Gen Intel i5-11320H (8) @ 4.500GHz 
          `"Y$b._             GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics] 
              `"""            Memory: 2809MiB / 15732MiB

答え1

（最大送信単位MTU）は、単一のネットワーク送信で送信できる最大のパケットサイズです。パケットが MTUリンクの容量を超える場合、データは複数のパケットに分割（分割）する必要があります。これらの複数のパケットは、リンクを介して送信、受信、確認、およびリモートエンドで再組み立てする必要があります。リンクが誤って設定され、送信するすべてのパケットを断片化する必要がある場合、実際のデータ転送速度は低下します。

イーサネット（有線）ネットワークはMTU1500バイトを使用します。

WiFiは、パケットあたりのWiFiの追加オーバーヘッド（8バイトのPPPoEヘッダー）のためにMTU1492を使用します。

MTUDHCPサーバーを設定してルーターの設定を確認する必要があります。

直接設定できますMTU（再起動後も設定は保持されません）。

sudo ip link set dev wlp0s20f3 mtu 1492

人々を読んでくださいip ip-link。

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