Comment 0 for bug 1882242

network-manager problems

June 4, 2020 apt update installed two networking packages:
network-manager_1.14.6-2+deb10u1_amd64.deb
libnm0_1.14.6-2+deb10u1_amd64.deb

System:
  Kernel: 5.4.0-33-generic x86_64
  Desktop: MATE 1.24.0
  Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine:
  Type: Laptop System: Dell product: Latitude E6530 v: 01

After rebooting the laptop, the wireless access point(s) are no longer available in the Network Manager. The "Enable Wi-Fi" is checked. "Wi-Fi Networks" is grayed out.

Network:
  Device-2: Broadcom and subsidiaries BCM43228 802.11a/b/g/n driver: wl
  IF: wlp2s0 state: dormant mac: 3c:77:e6:7c:5d:7b

$ sudo ip addr

wlp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state DORMANT group default qlen 1000
    link/ether 3c:77:e6:7c:5d:7b brd ff:ff:ff:ff:ff:ff

$ sudo nmcli
wlp2s0: disconnected
        "Broadcom and subsidiaries BCM43228"
        wifi (wl), 3C:77:E6:7C:5D:7B, hw, mtu 1500

$ sudo nmcli device show
GENERAL.DEVICE: wlp2s0
GENERAL.TYPE: wifi
GENERAL.HWADDR: 3C:77:E6:7C:5D:7B
GENERAL.MTU: 1500
GENERAL.STATE: 30 (disconnected)
GENERAL.CONNECTION: --
GENERAL.CON-PATH: --

$ sudo nmcli radio wifi
enabled

$ sudo iwlist wlp2s0 scanning
wlp2s0 No scan results

$ sudo iwlist wlp2s0 accesspoints
wlp2s0 Interface doesn't have a list of Peers/Access-Points

$ sudo iwlist wlp2s0 ap
wlp2s0 Interface doesn't have a list of Peers/Access-Points

$ sudo iwlist wlp2s0 wpakeys
wlp2s0 2 key sizes : 40, 104bits
          4 keys available :
Error reading wpa keys (SIOCGIWENCODEEXT): Operation not supported

$ sudo iwconfig wlp2s0
wlp2s0 IEEE 802.11 ESSID:off/any
          Mode:Managed Access Point: Not-Associated Tx-Power=200 dBm
          Retry short limit:7 RTS thr:off Fragment thr:off
          Encryption key:off
          Power Management:on

$ sudo rfkill list
1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
2: brcmwl-0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
3: dell-wifi: Wireless LAN
 Soft blocked: no
 Hard blocked: no