After upgrade to 21.04, WiFi unable to connect on channel 13

[J-Paul BERARD]

I have upgraded a desktop system from 20.10 to 21.04
Then, the computer didn't connect to my WiFi network anymore ! When I opened Network manager, I could see the WiFi networks of my neighbours but not mine !

My Wifi network is provided by a Freebox (french provider Free) and choose automatically the channel for the Wifi network (n type). At home, it was channel n° 13. The neighbours were on channel 6.
So I changed the setup of my box manually to channel 11 and the computer can see again my network and connect without problem ! Of course, this problem didn't happen with the 20.10 version : it was connected on channel 13 before the upgrade !

So it seems that Ubuntu 21.04 is unable to connect to a network on channel 13 !

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: network-manager 1.30.0-1ubuntu3
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 27 19:01:54 2021
InstallationDate: Installed on 2020-04-10 (382 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
IpRoute:
 default via 192.168.0.254 dev wlp4s6 proto dhcp metric 600
 default via 172.20.10.1 dev bnep0 proto dhcp metric 750
 169.254.0.0/16 dev bnep0 scope link metric 1000
 172.20.10.0/28 dev bnep0 proto kernel scope link src 172.20.10.6 metric 750
 192.168.0.0/24 dev wlp4s6 proto kernel scope link src 192.168.0.10 metric 600
SourcePackage: network-manager
UpgradeStatus: Upgraded to hirsute on 2021-04-26 (0 days ago)
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.30.0 connected started full enabled enabled enabled enabled enabled

[Sebastien Bacher (seb128)]

Thank you for your bug report, you might have a better chance to get a reply if you report it upstream on https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues

[J-Paul BERARD (arverne)]

Thanks. Done.

--
Jean-Paul

Le 30/04/2021 à 11:10, Sebastien Bacher a écrit :
> Thank you for your bug report, you might have a better chance to get a
> reply if you report it upstream on
> https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues
>
> ** Changed in: network-manager (Ubuntu)
> Importance: Undecided => Low
>