Ubuntu 20.04.1（内核版本 5.15.0.43）中的 Wi-Fi 连接不稳定，

Question

我最近升级到了 5.15.0.43，使用 Realtek RTL8723DE 802.11b/g/n PCIe 适配器时遇到了不稳定的 Wi-Fi 连接问题。

当我连接 Wi-fi 时，会发生以下情况ping google.com：

64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=631 ttl=117 time=494 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=632 ttl=117 time=1022 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=633 ttl=117 time=846 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=635 ttl=117 time=383 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=636 ttl=117 time=1017 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=637 ttl=117 time=16.5 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=638 ttl=117 time=179 ms

但是，使用有线连接进行测试时（02:00.0 以太网控制器：Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express 千兆以太网控制器（rev 15））：

64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=686 ttl=117 time=10.1 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=687 ttl=117 time=9.93 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=688 ttl=117 time=9.62 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=689 ttl=117 time=9.91 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=690 ttl=117 time=9.77 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=691 ttl=117 time=9.91 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=692 ttl=117 time=10.2 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=693 ttl=117 time=10.3 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=694 ttl=117 time=10.00 ms

我在升级内核版本时遇到过这个问题（我无法恢复到启动时可以运行的版本，因为我已经从该版本升级了三个小版本）

有没有什么建议可以改善这个适配器的 Wi-Fi 性能？通过 Dropbox 同步大文件时会出现问题，而有线连接时不会出现这种情况。

我一直在使用的驱动程序如下：https://github.com/lwfinger/rtw88自 2020 年起未更新。

其结果lpsci -knn | grep Net -A3是：

03:00.0 Network controller [0280]: Realtek 
Semiconductor Co., Ltd. RTL8723DE 802.11b/g/n PCIe Adapter [10ec:d723]
    DeviceName: WLAN
    Subsystem: Hewlett-Packard Company RTL8723DE 802.11b/g/n PCIe Adapter [103c:8319]
    Kernel driver in use: rtw_8723de
    Kernel modules: rtw88_8723de

注意：我目前不在我的家庭网络中，这就是为什么我可以尝试有线连接来显示这种差异。

编辑：它有所改进，但我仍然丢弃数据包，而有线网络不会发生这种情况：

64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=176 ttl=117 time=12.2 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=177 ttl=117 time=11.7 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=179 ttl=117 time=1027 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=180 ttl=117 time=13.3 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=183 ttl=117 time=1136 ms
64 bytes from lhr48s27-in-f14.1e100.net (142.250.178.14): icmp_seq=184 ttl=117 time=112 ms