Dear Managers

Recently I updated the kernel and at present I am unable to detect any wireless
networks. But I can connect to local ethernet. Here with I show the
NetworkManager.conf contents for your kind perusal.

*********
[main]
plugins=ifupdown,keyfile

no-auto-default=00:1d:ba:f4:19:5d,

[ifupdown]
managed=true

*********

Thanks a lot in advance

Best

Pichumani

Dear Maintainer,

   * What led up to the situation
Searching for an USB WiFi for Stretch, I found that the Panda PAU05 (PAU06) worked very nicely, provided that I backported
the device driver from Buster (testing). Since Buster has been promoted to Stable, the devices no longer work.
   * What exactly did you do (or not do) that was effective (or
     ineffective)
root@kilroy:/# uname -a
Linux kilroy 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1 (2020-01-26) x86_64 GNU/Linux

root@kilroy:/# lsusb
Bus 001 Device 002: ID 8087:8001 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 004: ID 05e3:0620 Genesys Logic, Inc.
Bus 003 Device 003: ID 05e3:0620 Genesys Logic, Inc.
Bus 003 Device 002: ID 05e3:0620 Genesys Logic, Inc.
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 007: ID 148f:5372 Ralink Technology, Corp. RT5372 Wireless Adapter
Bus 002 Device 005: ID 2341:003d Arduino SA
Bus 002 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 002 Device 008: ID 05a3:9230 ARC International Camera
Bus 002 Device 006: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 002 Device 004: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 002 Device 002: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@kilroy:/# /sbin/iwconfig
enp2s0    no wireless extensions.

enp3s0    no wireless extensions.

lo        no wireless extensions.

wlx9cefd5fdec63  IEEE 802.11  ESSID:"C&WM"
          Mode:Managed  Frequency:2.412 GHz  Access Point: Not-Associated
          Tx-Power=20 dBm
          Retry short  long limit:2   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off

root@kilroy:/# lsmod |grep rt2800usb
rt2800usb              32768  0
rt2x00usb              24576  1 rt2800usb
rt2800lib             118784  1 rt2800usb
rt2x00lib              57344  3 rt2800usb,rt2x00usb,rt2800lib
usbcore

root@kilroy:~$ nmcli device wifi list
IN-USE  SSID  MODE  CHAN  RATE  SIGNAL  BARS  SECURITY
root@kilroy:~$ nmcli connection show
NAME                            UUID                                  TYPE      DEVICE
New 802-11-wireless connection  6a704f1b-e178-4602-beed-c77d34b298dd  wifi      --
Wired connection 1              bd80662b-4772-47f8-8303-d4e23d188df6  ethernet  --
root@kilroy:/# /sbin/iw list
Wiphy phy0
        max # scan SSIDs: 4
        max scan IEs length: 2257 bytes
        max # sched scan SSIDs: 0
        max # match sets: 0
        max # scan plans: 1
        max scan plan interval: -1
        max scan plan iterations: 0
        Retry short long limit: 2
        Coverage class: 0 (up to 0m)
        Device supports RSN-IBSS.
        Supported Ciphers:
                * WEP40 (00-0f-ac:1)
                * WEP104 (00-0f-ac:5)
                * TKIP (00-0f-ac:2)
                * CCMP-128 (00-0f-ac:4)
                * CCMP-256 (00-0f-ac:10)
                * GCMP-128 (00-0f-ac:8)
                * GCMP-256 (00-0f-ac:9)
        Available Antennas: TX 0 RX 0
        Supported interface modes:
                 * IBSS
                 * managed
                 * AP
                 * AP/VLAN
                 * monitor
                 * mesh point
        Band 1:
                Capabilities: 0x2fe
                        HT20/HT40
                        SM Power Save disabled
                        RX Greenfield
                        RX HT20 SGI
                        RX HT40 SGI
                        TX STBC
                        RX STBC 2-streams
                        Max AMSDU length: 3839 bytes
                        No DSSS/CCK HT40
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: 2 usec (0x04)
                HT TX/RX MCS rate indexes supported: 0-15, 32
                Bitrates (non-HT):
                        * 1.0 Mbps
                        * 2.0 Mbps (short preamble supported)
                        * 5.5 Mbps (short preamble supported)
                        * 11.0 Mbps (short preamble supported)
                        * 6.0 Mbps
                        * 9.0 Mbps
                        * 12.0 Mbps
                        * 18.0 Mbps
                        * 24.0 Mbps
                        * 36.0 Mbps
                        * 48.0 Mbps
                        * 54.0 Mbps
                Frequencies:
                        * 2412 MHz [1] (20.0 dBm)
                        * 2417 MHz [2] (20.0 dBm)
                        * 2422 MHz [3] (20.0 dBm)
                        * 2427 MHz [4] (20.0 dBm)
                        * 2432 MHz [5] (20.0 dBm)
                        * 2437 MHz [6] (20.0 dBm)
                        * 2442 MHz [7] (20.0 dBm)
                        * 2447 MHz [8] (20.0 dBm)
                        * 2452 MHz [9] (20.0 dBm)
                        * 2457 MHz [10] (20.0 dBm)
                        * 2462 MHz [11] (20.0 dBm)
                        * 2467 MHz [12] (20.0 dBm) (no IR)
                        * 2472 MHz [13] (20.0 dBm) (no IR)
                        * 2484 MHz [14] (20.0 dBm) (no IR)
        Supported commands:
                 * new_interface
                 * set_interface
                 * new_key
                 * start_ap
                 * new_station
                 * new_mpath
                 * set_mesh_config
                 * set_bss
                 * authenticate
                 * associate
                 * deauthenticate
                 * disassociate
                 * join_ibss
                 * join_mesh
                 * set_tx_bitrate_mask
                 * frame
                 * frame_wait_cancel
                 * set_wiphy_netns
                 * set_channel
                 * set_wds_peer
                 * probe_client
                 * set_noack_map
                 * register_beacons
                 * start_p2p_device
                 * set_mcast_rate
                 * connect
                 * disconnect
                 * set_qos_map
                 * set_multicast_to_unicast
        Supported TX frame types:
                 * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
        Supported RX frame types:
                 * IBSS: 0x40 0xb0 0xc0 0xd0
                 * managed: 0x40 0xd0
                 * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
                 * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
                 * mesh point: 0xb0 0xc0 0xd0
                 * P2P-client: 0x40 0xd0
                 * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
                 * P2P-device: 0x40 0xd0
        software interface modes (can always be added):
                 * AP/VLAN
                 * monitor
        valid interface combinations:
                 * #{ AP, mesh point } <= 8,
                   total <= 8, #channels <= 1
        HT Capability overrides:
                 * MCS: ff ff ff ff ff ff ff ff ff ff
                 * maximum A-MSDU length
                 * supported channel width
                 * short GI for 40 MHz
                 * max A-MPDU length exponent
                 * min MPDU start spacing
        Device supports TX status socket option.
        Device supports HT-IBSS.
        Device supports SAE with AUTHENTICATE command
        Device supports low priority scan.
        Device supports scan flush.
        Device supports AP scan.
        Device supports per-vif TX power setting
        Driver supports full state transitions for AP/GO clients
        Driver supports a userspace MPM
        Device supports configuring vdev MAC-addr on create.
        Supported extended features:
                * [ RRM ]: RRM
                * [ FILS_STA ]: STA FILS (Fast Initial Link Setup)
                * [ CQM_RSSI_LIST ]: multiple CQM_RSSI_THOLD records
                * [ CONTROL_PORT_OVER_NL80211 ]: control port over nl80211?

Dear Maintainer,

I've been dealing with this problem with one upgrade--buster to bullseye--and one new
install of bullseye 11. It seems I must install the correct firmware,
which I already knew, load the driver with modporobe, and then reboot.

But there is still the problem that it will lose the wifi interface
with subsequent reboots. I have not demonstrated that with the
new install, but with the upgrade I did.

So, work needs to be done, because it's not as simple as installing
a few packages to get the interface set up once and for all. And
this type of behavior is very unlike modern Debian, so users have no
experience with it.

I'm not positive it's even a nm bug. But nm cannot find the wifi interface,
because it doesn't exist.

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
   * What was the outcome of this action?
   * What outcome did you expect instead?

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