WIFI отключается каждые полчаса

У меня есть Thinkpad от Lenovo с беспроводной связью Intel: Cannon Point-LP CNVi [Wireless-AC] 9560. Он отлично работал, пока я не обновился с Ubuntu 18.04 до 20.04. С тех пор он каждые полчаса отключается от интернета.

Я пробовал обновить ядро ​​до 5.7, а затем понизить до 5.3. Пробовал поиграть с энергосберегающим Wi-Fi Я попытался установить предложенный Intel драйвер (9000 v.34) вместо предоставленного v.46. Я попробовал отключить systemctl --now wpa_supplicant.service Я пробовал использовать arping в crontab И еще кое-что, что я обнаружил, что было частично связано с моей проблемой

Я нашел это интересным в системном журнале, но не смог найти никакой справки по нему в Интернете:

NetworkManager[753]: <error> [1592273107.1148] dhcp4 (wlp0s20f3): error -113 dispatching events
NetworkManager[753]: <info>  [1592273107.1149] dhcp4 (wlp0s20f3): state changed bound -> fail
NetworkManager[753]: <info>  [1592273107.1150] device (wlp0s20f3): DHCPv4: trying to acquire a new lease within 90 seconds
NetworkManager[753]: <info>  [1592273197.5254] device (wlp0s20f3): DHCPv4: grace period expired
Jun 15 22:06:37 nachshon-thinkbook NetworkManager[753]: <info>  [1592273197.5255] device (wlp0s20f3): state change: activated -> failed (reason 'ip-config-unavailable', sys-iface-state: 'managed')
NetworkManager[753]: <info>  [1592273197.5269] manager: NetworkManager state is now DISCONNECTED
NetworkManager[753]: <warn>  [1592273197.5304] device (wlp0s20f3): Activation: failed for connection 'Korem'
NetworkManager[753]: <info>  [1592273197.5317] device (wlp0s20f3): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
avahi-daemon[746]: Withdrawing address record for fe88::4284:701b:3825:61df on wlp0s20f3.
avahi-daemon[746]: Leaving mDNS multicast group on interface wlp0s20f3.IPv6 with address fe80::4284:701b:3825:61df.
NetworkManager[753]: <info>  [1592273197.5327] dhcp4 (wlp0s20f3): canceled DHCP transaction
avahi-daemon[746]: Interface wlp0s20f3.IPv6 no longer relevant for mDNS.
NetworkManager[753]: <info>  [1592273197.5327] dhcp4 (wlp0s20f3): state changed fail -> done
avahi-daemon[746]: Withdrawing address record for 172.18.42.16 on wlp0s20f3.
avahi-daemon[746]: Leaving mDNS multicast group on interface wlp0s20f3.IPv4 with address 172.16.42.16.
avahi-daemon[746]: Interface wlp0s20f3.IPv4 no longer relevant for mDNS.
dbus-daemon[751]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.11' (uid=0 pid=753 comm="/usr/sbin/NetworkManager --no-daemon ")
systemd[1]: Starting Network Manager Script Dispatcher Service...
kernel: [ 4382.017856] wlp0s20f3: deauthenticating from f2:08:6d:0d:bf:90 by local choice (Reason: 3=DEAUTH_LEAVING)
wpa_supplicant[967]: wlp0s20f3: CTRL-EVENT-DISCONNECTED bssid=f2:08:6d:0d:bf:90 reason=3 locally_generated=1
wpa_supplicant[967]: dbus: wpa_dbus_property_changed: no property SessionLength in object /fi/w1/wpa_supplicant1/Interfaces/2
whoopsie[1444]: [22:06:37] Cannot reach: https://daisy.ubuntu.com
whoopsie[1444]: [22:06:37] offline
NetworkManager[753]: <warn>  [1592273197.5594] sup-iface[0x556a2ced3af0,wlp0s20f3]: connection disconnected (reason -3)
NetworkManager[753]: <info>  [1592273197.5595] device (wlp0s20f3): supplicant interface state: completed -> disconnected
dbus-daemon[751]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
systemd[1]: Started Network Manager Script Dispatcher Service.

rfkill output:

0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: ideapad_bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
2: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no
5: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

lspci -knn output

Network controller [0280]: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] [8086:9df0] (rev 30)
    Subsystem: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] [8086:0034]
    Kernel driver in use: iwlwifi

uname -a output

Linux 5.3.0-050300-generic #201909152230 SMP Sun Sep 15 22:32:54 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux