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[Bug 1510648] Re: [Ubuntu Server 15.04/15.10] Realtek RTL8723AE cannot connect to WPA2/AES

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I've made some progress: 
If I remove the following lines from /etc/network/interfaces:
iface wlan0 inet dhcp
iface wlan0 inet6 auto

NetworkManager errors "nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed" are gone:
systemctl status NetworkManager
● NetworkManager.service - Network Manager
   Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2015-11-02 09:42:09 CET; 3s ago
 Main PID: 5524 (NetworkManager)
   CGroup: /system.slice/NetworkManager.service
           └─5524 /usr/sbin/NetworkManager --no-daemon

Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (tap1): device state change: secondaries -> activated (reason 'none') [90 100 0]
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (tap1): Activation: successful, device activated.
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr4): device state change: secondaries -> activated (reason 'none') [90 100 0]
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr4): Activation: successful, device activated.
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr11): device state change: secondaries -> activated (reason 'none') [90 100 0]
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr11): Activation: successful, device activated.
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr7): device state change: secondaries -> activated (reason 'none') [90 100 0]
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr7): Activation: successful, device activated.
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr3): device state change: secondaries -> activated (reason 'none') [90 100 0]
Nov 02 09:42:10 msi-ge60-ubuntu NetworkManager[5524]: <info>  (virbr3): Activation: successful, device activated.

However, it seems that the module rtl8723ae is not loaded:
lsmod | grep -i rtl8723ae

modinfo rtl8723ae
libkmod: ERROR ../libkmod/libkmod-module.c:192 kmod_module_parse_depline: ctx=0x55ae7dba3010 path=/lib/modules/4.2.0-16-generic/updates/drivers/net/wireless/rtlwifi/rtl8723com/rtl8723-common.ko error=No such file or directory
libkmod: ERROR ../libkmod/libkmod.c:506 lookup_builtin_file: could not open builtin file '/lib/modules/4.2.0-16-generic/modules.builtin.bin'
filename:       /lib/modules/4.2.0-16-generic/updates/drivers/net/wireless/rtlwifi/rtl8723ae/rtl8723ae.ko
modinfo: ERROR: could not get modinfo from 'rtl8723ae': No such file or directory

lshw -C network
  *-network UNCLAIMED
       description: Network controller
       product: RTL8723AE PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:05:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress cap_list
       configuration: latency=0
       resources: ioport:c000(size=256) memory:f7800000-f7803fff

This is strange because I can see some WiFi networks in the top right hand side menu.
Furthermore, if I try to connect to a WiFi hotspot (Nexus 5 here), NetworkManager tries to connect to the Nexus 5 bluetooth interface (BC:F5:AC:4B:72:11):

Nov  2 09:43:17 msi-ge60-ubuntu NetworkManager[5524]: <info>  (BC:F5:AC:4B:72:11): Activation: starting connection 'Nexus 5 Network' (3a1ff886-d78c-49c3-8984-a635c16ec9c9)
Nov  2 09:43:17 msi-ge60-ubuntu NetworkManager[5524]: <info>  (BC:F5:AC:4B:72:11): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Nov  2 09:43:17 msi-ge60-ubuntu NetworkManager[5524]: <info>  NetworkManager state is now CONNECTING
Nov  2 09:43:17 msi-ge60-ubuntu NetworkManager[5524]: <info>  (BC:F5:AC:4B:72:11): device state change: prepare -> config (reason 'none') [40 50 0]
Nov  2 09:43:23 msi-ge60-ubuntu NetworkManager[5524]: <warn>  (BC:F5:AC:4B:72:11): Error connecting with bluez: GDBus.Error:org.bluez.Error.Failed: Input/output error
Nov  2 09:43:23 msi-ge60-ubuntu NetworkManager[5524]: <info>  (BC:F5:AC:4B:72:11): device state change: config -> failed (reason 'bluetooth-failed') [50 120 44]
Nov  2 09:43:23 msi-ge60-ubuntu NetworkManager[5524]: <info>  NetworkManager state is now CONNECTED_LOCAL
Nov  2 09:43:23 msi-ge60-ubuntu NetworkManager[5524]: <info>  Connection 'Nexus 5 Network' failed to autoconnect; 4 tries left
Nov  2 09:43:23 msi-ge60-ubuntu NetworkManager[5524]: <warn>  (BC:F5:AC:4B:72:11): Activation: failed for connection 'Nexus 5 Network'
Nov  2 09:43:23 msi-ge60-ubuntu NetworkManager[5524]: <info>  (BC:F5:AC:4B:72:11): device state change: failed -> disconnected (reason 'none') [120 30 0]
Nov  2 09:43:23 msi-ge60-ubuntu NetworkManager[5524]: <info>  Device 'BC:F5:AC:4B:72:11' has no connection; scheduling activate_check in 0 seconds.

Now, if I try to turn off bluetooth, Ubuntu goes into airplane mode
which disables WiFi as well - I'm unable to turn off bluetooth alone.

Connecting Ubuntu Server to Nexus 5 Bluetooth: OK

Reconnecting it to Nexus 5 Hotspot: KO
Nov  2 10:00:35 msi-ge60-ubuntu NetworkManager[5524]: <info>  (BC:F5:AC:4B:72:11): device state change: config -> failed (reason 'bluetooth-failed') [50 120 44]
Nov  2 10:00:35 msi-ge60-ubuntu NetworkManager[5524]: <info>  NetworkManager state is now CONNECTED_LOCAL
Nov  2 10:00:35 msi-ge60-ubuntu NetworkManager[5524]: <info>  Connection 'Nexus 5 Network' failed to autoconnect; 3 tries left
Nov  2 10:00:35 msi-ge60-ubuntu NetworkManager[5524]: <warn>  (BC:F5:AC:4B:72:11): Activation: failed for connection 'Nexus 5 Network'
Nov  2 10:00:35 msi-ge60-ubuntu NetworkManager[5524]: <info>  (BC:F5:AC:4B:72:11): device state change: failed -> disconnected (reason 'none') [120 30 0]
Nov  2 10:00:35 msi-ge60-ubuntu NetworkManager[5524]: <warn>  (BC:F5:AC:4B:72:11): failed to enable userspace IPv6LL address handling
Nov  2 10:00:35 msi-ge60-ubuntu NetworkManager[5524]: <info>  Device 'BC:F5:AC:4B:72:11' has no connection; scheduling activate_check in 0 seconds.

This seems to indicate that WiFi & bluetooth interfaces are considered as the same interface for this operation, which is very strange.
Ubuntu Server tries to connect to the bluetooth interface of the Nexus 5 hotspot, probably because the rtl8723ae module is not loaded.

If I try to manually load the rtl8723ae module in /etc/modules:
rtl8723ae

update-initramfs-u
shutdown -r now

It does not change anything.

I believe we should try to solve the errors shown in "modinfo
rtl8723ae".

-- 
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1510648

Title:
  [Ubuntu Server 15.04/15.10] Realtek RTL8723AE cannot connect to
  WPA2/AES

Status in network-manager package in Ubuntu:
  New

Bug description:
  Ubuntu Gnome Server 15.10 - 4.2.0-16-generic - network-manager-gnome  0.9.10.1
  -------------------------------------------------------------------------------
  sudo systemctl status NetworkManager.service
  ● NetworkManager.service - Network Manager
     Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
     Active: active (running) since Tue 2015-10-27 12:15:32 CET; 1min 17s ago
   Main PID: 1204 (NetworkManager)
     CGroup: /system.slice/NetworkManager.service
             └─1204 /usr/sbin/NetworkManager --no-daemon

  Oct 27 12:15:59 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:00 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:00 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:02 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:03 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:03 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:03 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:05 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:20 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed
  Oct 27 12:16:20 msi-ge60-ubuntu NetworkManager[1204]: nm_urfkill_get_wlan_state: assertion 'self->wlan_proxy != NULL' failed

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References

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