Public bug reported:
On Live session or after installation, the wifi adapter is recognized,
the password phrase is accepted but it never connect and loop forever.
Thinkpad T430 with Intel Centrino 6205
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor
Peak] (rev 34)
It is not a Passphrase issue. Same PC with Debian 9 or 10 works very well.
Really strange, considering Ubuntu 18.04 is based on Debian 10 !!!
After comparing many files, it appears that the 2 last files of
/etc/NetworkManager/NetworkManager.conf have been added on Ubuntu !
Debian 10:
$ cat /NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
Ubuntu 18.04:
$ cat /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
[device]
wifi.scan-rand-mac-address=no
I removed the last 2 files in Ubuntu 18.04, and now Wifi works
perfectly. The wifi passphrase is accepted, and even going to sleep mode
and back is fine.
------
I would strongly recommend to modify /etc/NetworkManager/NetworkManager.conf in
package network-manager to remove the 2 last lines.
In fact this file should not be modified by Ubuntu and kept as in Debian.
Is it possible to do it in Ubuntu before 18.04 LTS to be launched ???
------
It seems this 2 lines have been added due to bug 1681513:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1681513
As reported here:
https://askubuntu.com/questions/905283/wifi-issue-with-ubuntu-17-04
By the way, file NetworkManager.conf is empty in Fedora...
Cheers
Fred
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1762152
Title:
Network Manager is unable to connect to Wifi. Ask password and then
loop forever
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