Сабж хреново работает как с родными драйверами, так и с патчами https://aur.archlinux.org/packages/broadcom-wl-dkms
Примерно раз в 2 дня скорость резко падает, примерно через минуту происходит дисконект, и после реконекта скорость не восстанавливается.
После "rmmod wl; modprobe" скорость восстанавлиется еще на 2 дня.
Происходит с разными точками доступа
В /var/log/syslog

Feb 22 12:32:52 admin wpa_supplicant[780]: wlo1: CTRL-EVENT-DISCONNECTED bssid=20:4e:7f:4a:a2:11 reason=0
Feb 22 12:32:52 admin NetworkManager[703]: <info>  (wlo1): supplicant interface state: completed -> disconnected
Feb 22 12:32:52 admin NetworkManager[703]: <info>  (wlo1): supplicant interface state: disconnected -> scanning
Feb 22 12:32:52 admin wpa_supplicant[780]: wlo1: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD
Feb 22 12:32:52 admin kernel: [70954.289499] cfg80211: World regulatory domain updated:
Feb 22 12:32:52 admin kernel: [70954.289503] cfg80211:  DFS Master region: unset
Feb 22 12:32:52 admin kernel: [70954.289504] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Feb 22 12:32:52 admin kernel: [70954.289506] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Feb 22 12:32:52 admin kernel: [70954.289508] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Feb 22 12:32:52 admin kernel: [70954.289509] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
Feb 22 12:32:52 admin kernel: [70954.289510] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
Feb 22 12:32:52 admin kernel: [70954.289512] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
Feb 22 12:32:52 admin kernel: [70954.289513] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
Feb 22 12:32:52 admin kernel: [70954.289514] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
Feb 22 12:32:52 admin kernel: [70954.289515] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
Feb 22 12:32:53 admin wpa_supplicant[780]: wlo1: Trying to associate with 20:4e:7f:4a:a2:11 (SSID='Hello' freq=2412 MHz)
Feb 22 12:32:53 admin NetworkManager[703]: <info>  (wlo1): supplicant interface state: scanning -> associating
Feb 22 12:32:53 admin wpa_supplicant[780]: wlo1: Associated with 20:4e:7f:4a:a2:11
Feb 22 12:32:53 admin NetworkManager[703]: <info>  (wlo1): supplicant interface state: associating -> associated
Feb 22 12:32:57 admin NetworkManager[703]: <info>  (wlo1): supplicant interface state: associated -> 4-way handshake
Feb 22 12:32:57 admin wpa_supplicant[780]: wlo1: WPA: Key negotiation completed with 20:4e:7f:4a:a2:11 [PTK=CCMP GTK=CCMP]
Feb 22 12:32:57 admin wpa_supplicant[780]: wlo1: CTRL-EVENT-CONNECTED - Connection to 20:4e:7f:4a:a2:11 completed [id=0 id_str=]
Feb 22 12:32:57 admin NetworkManager[703]: <info>  (wlo1): supplicant interface state: 4-way handshake -> completed