I installed 24.04 Desktop on a Pi 5. When I enabled Hotspot on the internal
NIC, ifconfig reported successful configuration:
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.42.0.1 netmask 255.255.255.0 broadcast 10.42.0.255
inet6 fe80::cea:6807:a627:da82 prefixlen 64 scopeid 0x20<link>
ether d8:3a:dd:e9:9c:d0 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 93 bytes 9831 (9.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
However, the Hotspot is not visible from other machines. That is, it does not
appear during a scan. The Pi 5 syslog contains these messages:
2024-05-17T09:52:58.712376-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7117] device (wlan0): Activation: starting connection 'Hotspot'
(5e79d83f-bdf5-488d-a204-44b4b11fe933)
2024-05-17T09:52:58.712675-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7125] device (wlan0): state change: disconnected -> prepare (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:58.713302-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7131] device (wlan0): state change: prepare -> config (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:58.718217-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7179] device (wlan0): Activation: (wifi) access point 'Hotspot' has
security, but secrets are required.
2024-05-17T09:52:58.719063-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7180] device (wlan0): state change: config -> need-auth (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:58.720596-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7204] device (wlan0): state change: need-auth -> prepare (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:58.723198-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7223] device (wlan0): state change: prepare -> config (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:58.723362-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7229] device (wlan0): Activation: (wifi) connection 'Hotspot' has
security, and secrets exist. No new secrets needed.
2024-05-17T09:52:58.724332-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7231] Config: added 'ssid' value 'pi5-0ud'
2024-05-17T09:52:58.725169-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7232] Config: added 'mode' value '2'
2024-05-17T09:52:58.725273-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7232] Config: added 'frequency' value '2412'
2024-05-17T09:52:58.725337-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7232] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256'
2024-05-17T09:52:58.725393-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7232] Config: added 'psk' value '<hidden>'
2024-05-17T09:52:58.725468-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7232] Config: added 'proto' value 'RSN'
2024-05-17T09:52:58.725534-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7232] Config: added 'pairwise' value 'CCMP'
2024-05-17T09:52:58.725591-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.7232] Config: added 'group' value 'CCMP'
2024-05-17T09:52:58.728494-04:00 pi5-0ud wpa_supplicant[1131]: Note: nl80211
driver interface is not designed to be used with ap_scan=2; this can result in
connection failures
2024-05-17T09:52:58.857318-04:00 pi5-0ud wpa_supplicant[1131]: wlan0: interface
state UNINITIALIZED->ENABLED
2024-05-17T09:52:58.857449-04:00 pi5-0ud wpa_supplicant[1131]: wlan0:
AP-ENABLED
2024-05-17T09:52:58.857526-04:00 pi5-0ud wpa_supplicant[1131]: wlan0:
CTRL-EVENT-CONNECTED - Connection to d8:3a:dd:e9:9c:d0 completed [id=0 id_str=]
2024-05-17T09:52:58.858542-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.8584] device (wlan0): supplicant interface state: disconnected ->
completed
2024-05-17T09:52:58.858690-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.8584] device (wlan0): Activation: (wifi) Stage 2 of 5 (Device
Configure) successful. Started Wi-Fi Hotspot "pi5-0ud"
2024-05-17T09:52:58.858779-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.8584] device (p2p-dev-wlan0): supplicant management interface
state: disconnected -> completed
2024-05-17T09:52:58.858856-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953978.8587] device (wlan0): state change: config -> ip-config (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:58.909176-04:00 pi5-0ud avahi-daemon[1025]: Joining mDNS
multicast group on interface wlan0.IPv6 with address fe80::cea:6807:a627:da82.
2024-05-17T09:52:58.909365-04:00 pi5-0ud avahi-daemon[1025]: New relevant
interface wlan0.IPv6 for mDNS.
2024-05-17T09:52:58.909419-04:00 pi5-0ud avahi-daemon[1025]: Registering new
address record for fe80::cea:6807:a627:da82 on wlan0.*.
2024-05-17T09:52:59.036709-04:00 pi5-0ud avahi-daemon[1025]: Joining mDNS
multicast group on interface wlan0.IPv4 with address 10.42.0.1.
2024-05-17T09:52:59.041005-04:00 pi5-0ud avahi-daemon[1025]: New relevant
interface wlan0.IPv4 for mDNS.
2024-05-17T09:52:59.041264-04:00 pi5-0ud avahi-daemon[1025]: Registering new
address record for 10.42.0.1 on wlan0.IPv4.
2024-05-17T09:52:59.041343-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953979.0411] dnsmasq-manager: starting dnsmasq...
2024-05-17T09:52:59.047022-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953979.0458] device (wlan0): state change: ip-config -> ip-check (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:59.051754-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953979.0515] device (wlan0): state change: ip-check -> secondaries (reason
'none', sys-iface-state: 'managed')
2024-05-17T09:52:59.053305-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953979.0518] device (wlan0): state change: secondaries -> activated
(reason 'none', sys-iface-state: 'managed')
2024-05-17T09:52:59.054172-04:00 pi5-0ud dnsmasq[5069]: started, version 2.90
cachesize 150
2024-05-17T09:52:59.054291-04:00 pi5-0ud dnsmasq[5069]: compile time options:
IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP conntrack ipset
nftset auth cryptohash DNSSEC loop-detect inotify dumpfile
2024-05-17T09:52:59.054350-04:00 pi5-0ud dnsmasq[5069]: chown of PID file
/run/nm-dnsmasq-wlan0.pid failed: Operation not permitted
2024-05-17T09:52:59.054396-04:00 pi5-0ud dnsmasq-dhcp[5069]: DHCP, IP range
10.42.0.10 -- 10.42.0.254, lease time 1h
2024-05-17T09:52:59.054439-04:00 pi5-0ud dnsmasq[5069]: reading /etc/resolv.conf
2024-05-17T09:52:59.054477-04:00 pi5-0ud dnsmasq[5069]: using nameserver
127.0.0.53#53
2024-05-17T09:52:59.054517-04:00 pi5-0ud dnsmasq[5069]: cleared cache
2024-05-17T09:52:59.056766-04:00 pi5-0ud NetworkManager[1128]: <info>
[1715953979.0552] device (wlan0): Activation: successful, device activated.
2024-05-17T09:53:03.908905-04:00 pi5-0ud kernel: brcmfmac: brcmf_set_channel:
set chanspec 0x100c fail, reason -52
2024-05-17T09:53:03.908928-04:00 pi5-0ud kernel: brcmfmac: brcmf_set_channel:
set chanspec 0x100d fail, reason -52
2024-05-17T09:53:03.909885-04:00 pi5-0ud kernel: brcmfmac: brcmf_set_channel:
set chanspec 0x100e fail, reason -52
2024-05-17T09:53:03.909895-04:00 pi5-0ud kernel: brcmfmac: brcmf_set_channel:
set chanspec 0xd022 fail, reason -52
2024-05-17T09:53:04.012896-04:00 pi5-0ud kernel: brcmfmac: brcmf_set_channel:
set chanspec 0xd026 fail, reason -52
2024-05-17T09:53:04.108896-04:00 pi5-0ud kernel: brcmfmac: brcmf_set_channel:
set chanspec 0xd02a fail, reason -52
2024-05-17T09:53:04.204897-04:00 pi5-0ud kernel: brcmfmac: brcmf_set_channel:
set chanspec 0xd02e fail, reason -52
2024-05-17T09:53:08.719063-04:00 pi5-0ud systemd[1]:
NetworkManager-dispatcher.service: Deactivated successfully.
If, however, I specify band: 5GHz in the netplan wlan0 configuration,
the ap comes up successfully and I can connect to it from other
machines.
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https://bugs.launchpad.net/bugs/2065828
Title:
Cannot connect to 24.04 hotspot.
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