Wifi connection don't autoconnect at boot but it works afterwards

[ktecho]

I'm using Kubuntu 18.04 installed from a daily and updated to current.

When I restart my pc, NetworkManager cannot connect to wifi. According to logs (autoattached and here: https://paste.ubuntu.com/p/fmcF6B5T6x/) the problem is that NetworkManager cannot get the password. If I wait until it errors out or click "Disconnect" then "Connect", it works perfect.

I've seen users in some forums (https://bbs.archlinux.org/viewtopic.php?id=233519) telling that the problem is that when NetworkManager boots, KWallet is not yet available and so it doesn't have the password to connect to the wifi network. But if you click the "Connect" button, then KWallet is available and then it works. Maybe NetworkManager should depend on KWallet at boot (just Kubuntu, of course).

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: network-manager 1.10.4-1ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
Date: Mon Mar 19 10:18:03 2018
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2018-03-11 (8 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180310)
IpRoute:
 default via 192.168.1.1 dev wlp58s0 proto dhcp metric 600
 169.254.0.0/16 dev wlp58s0 scope link metric 1000
 192.168.1.0/24 dev wlp58s0 proto kernel scope link src 192.168.1.133 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
 NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH SLAVE
 MIWIFI_2G_y36Y 602d6129-d306-4b63-9b96-aa042a710863 wifi 1521450896 lun 19 mar 2018 10:14:56 CET yes 0 no /org/freedesktop/NetworkManager/Settings/1 yes wlp58s0 activated /org/freedesktop/NetworkManager/ActiveConnection/2 --
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 wlp58s0 wifi connected /org/freedesktop/NetworkManager/Devices/2 MIWIFI_2G_y36Y 602d6129-d306-4b63-9b96-aa042a710863 /org/freedesktop/NetworkManager/ActiveConnection/2
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- --
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.10.4 connected started full enabled enabled enabled enabled enabled

[ktecho (ktecho)]

I've tried the solution to Archlinux forum post and it works right now. The solution (more like a hack) is proposed here in the bottom message: https://superuser.com/questions/1278234/have-to-restart-networkmanager-to-get-wifi-autoconnect

So, is anyone interested on trying a definitive solution to this? I can do whatever test you need, now that we know where the problem is.