wifi connection to an protected EAP, MSCHAPv2 connection drops constantly

[Willem Hobers]

Hi all,

My wifi connection disconnects constantly when I am connected to an eduroam/govroam access point (protected EAP, MSCHAPv2).

The wifi driver is: rtl8812au-dkms.

Linux Xubuntu-18-04 4.15.0-22-generic #24-Ubuntu SMP Wed May 16 12:15:17 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821AE 802.11ac PCIe Wireless Network Adapter

Symptoms: the (eduroam) wifi-network is found, the wifi connection is set up, it works for a bit and then the connection is dropped.

If I use my Android phone (which connects fine to the eduroam connection), to tether my laptop, the connection is fine.

Also my laptop connects flawlessly to my home connection (WPA).

In kern.log I see messages like this (redacted the mac-address):
May 28 10:30:09 Xubuntu-18-04 kernel: [ 157.858664] wlp2s0: disassociated from 00:**:**:**:**:** (Reason: 1=UNSPECIFIED)
May 28 10:31:56 Xubuntu-18-04 kernel: [ 265.191355] wlp2s0: deauthenticating from 00:**:**:**:**:** by local choice (Reason: 3=DEAUTH_
LEAVING)
May 28 10:32:55 Xubuntu-18-04 kernel: [ 324.049168] wlp2s0: disassociated from 00:**:**:**:**:** (Reason: 1=UNSPECIFIED)
May 28 10:32:57 Xubuntu-18-04 kernel: [ 326.168600] wlp2s0: deauthenticated from 00:**:**:**:**:** (Reason: 7=CLASS3_FRAME_FROM_NONASS
OC_STA)
May 28 10:32:59 Xubuntu-18-04 kernel: [ 327.696740] wlp2s0: deauthenticated from 00:**:**:**:**:** (Reason: 7=CLASS3_FRAME_FROM_NONASS
OC_STA)
May 28 10:33:00 Xubuntu-18-04 kernel: [ 329.056596] wlp2s0: deauthenticated from 00:**:**:**:**:** (Reason: 7=CLASS3_FRAME_FROM_NONASS
OC_STA)
May 28 10:33:01 Xubuntu-18-04 kernel: [ 330.449235] wlp2s0: disassociated from 00:**:**:**:**:** (Reason: 1=UNSPECIFIED)
May 28 10:33:03 Xubuntu-18-04 kernel: [ 332.448884] wlp2s0: disassociated from 00:**:**:**:**:** (Reason: 1=UNSPECIFIED)
May 28 10:33:05 Xubuntu-18-04 kernel: [ 334.249308] wlp2s0: disassociated from 00:**:**:**:**:** (Reason: 1=UNSPECIFIED)
May 28 10:33:07 Xubuntu-18-04 kernel: [ 336.418400] wlp2s0: deauthenticated from 00:**:**:**:**:** (Reason: 7=CLASS3_FRAME_FROM_NONASS
OC_STA)
I have been using 18.04 without problems (and 16.04 before that) until recently; so it seems the problem is recent.

If there is any more information I can provide please let me know.

Edit: I came across a thread which seems to describe the same problem; and people there have tried analyzing the problem. I don't understand what people are saying there, so it may not be helpful, still: https://bbs.archlinux.org/viewtopic.php?id=230963

Edit 2: I'm also seeing this in 18.10 (the daily of which I am testing).