我正在使用 Ubuntu 21.04。一切都很顺利，但昨天突然无法连接到 Wi-Fi。它可以连接，但过一段时间就会断开连接。当我离调制解调器很近时没有问题，但当我离调制解调器稍远时，这个问题就开始了。
我同时使用 Windows 和 Ubuntu。我可以在某个位置毫无问题地将 Wi-Fi 与 Windows 一起使用，但无法在同一位置将 Wi-Fi 与 Ubuntu 一起使用。
结果sudo journalctl -b 0 -u NetworkManager：
32979391.8832] dhcp4 (wlo1): activation: beginning transaction (timeout in 45 seconds) 32979391.9433] device (wlo1): supplicant interface state: associated -> 4way_handshake 32979392.9476] device (wlo1): supplicant interface state: 4way_handshake -> completed 32979394.6441] device (wlo1): supplicant interface state: completed -> disconnected 32979395.2368] device (wlo1): supplicant interface state: disconnected -> scanning 32979399.7789] device (wlo1): supplicant interface state: scanning -> authenticating 32979399.7811] device (wlo1): supplicant interface state: authenticating -> associating 32979399.8008] device (wlo1): supplicant interface state: associating -> associated 32979399.8008] device (wlo1): DHCPv4 lease renewal requested 32979399.8302] dhcp4 (wlo1): canceled DHCP transaction 32979399.8303] dhcp4 (wlo1): state changed unknown -> done
日志中重复上述输出。
lspci -knn | grep -EA3 'Net' 命令的输出是：
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821] DeviceName: WLAN Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:831a] Kernel driver in use: rtw_8821ce Kernel modules: rtw88_8821ce, rtl8821ce 03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev c2)