10ec:8821 rtl8821ae has no connectivity with 5GHz/802.11ac network

Bug #1536490 reported by Simon Naunton on 2016-01-21
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

What is expected to happen is that when I connect my Lenovo Ideapad 300 to my ASUS RT-AC68U (firmware 802.11ac on 5GHz, it connects fine, just like it does with Windows 10 home.

What happens instead is that I obtain an IP address, gateway, DNS etc. but no traffic occurs.

git clone https://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
sudo make install
sudo restart now

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-25-generic 4.2.0-25.30
ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6
Uname: Linux 4.2.0-25-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
 /dev/snd/controlC0: si 1379 F.... pulseaudio
CurrentDesktop: XFCE
Date: Thu Jan 21 17:25:45 2016
HibernationDevice: RESUME=UUID=ccc3ab01-94d8-4d55-89b4-21ece100a3d6
InstallationDate: Installed on 2016-01-21 (0 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 0bda:0821 Realtek Semiconductor Corp.
 Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
 Bus 001 Device 002: ID 174f:14e9 Syntek
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 80Q7
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-25-generic.efi.signed root=UUID=cab1a31f-1f61-43e6-a6e7-2edc12bb048d ro quiet splash vt.handoff=7
 linux-restricted-modules-4.2.0-25-generic N/A
 linux-backports-modules-4.2.0-25-generic N/A
 linux-firmware 1.149.3
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/13/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: D5CN28WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Paris 5A8
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40700 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad 300-15ISK
dmi.modalias: dmi:bvnLENOVO:bvrD5CN28WW:bd08/13/2015:svnLENOVO:pn80Q7:pvrLenovoideapad300-15ISK:rvnLENOVO:rnParis5A8:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrLenovoideapad300-15ISK:
dmi.product.name: 80Q7
dmi.product.version: Lenovo ideapad 300-15ISK
dmi.sys.vendor: LENOVO

Simon Naunton (snaunton) wrote :
tags: added: bios-outdated-d5cn28ww
tags: added: bios-outdated-d5cn29ww
removed: bios-outdated-d5cn28ww
Changed in linux (Ubuntu):
importance: Undecided → Low
status: New → Incomplete
Simon Naunton (snaunton) wrote :

Thanks. Updated bios, sudo make uninstall on the old driver, rebooted and all good.

Simon Naunton (snaunton) wrote :


Changed in linux (Ubuntu):
importance: Low → Medium
Simon Naunton (snaunton) wrote :

Sorry, corporate wifi. Have no idea what the route/APs are and certainly do not have access to firmware version etc.

Simon Naunton (snaunton) wrote :

Same problem after upgrading kernel to linux-image-4.2.0-27-generic. Works fine with 4.2.0-25. On home router this time (have not tried at work - I do not plan on taking this laptop to work):

1) Manufacturer

2) Model

3) Firmware Version

tags: added: latest-bios-d5cn29ww
removed: bios-outdated-d5cn29ww
tags: added: regression-update
Simon Naunton (snaunton) wrote :

Upgraded router to latest firmware (
No change.

Changed in linux (Ubuntu):
status: Incomplete → Confirmed
description: updated
tags: added: cherry-pick
summary: - rtl8821ae has no connectivity in 5GHz networks
+ 10ec:8821 rtl8821ae has no connectivity with 5GHz/802.11ac network
Changed in linux (Ubuntu):
importance: Medium → High
status: Confirmed → Triaged
Simon Naunton (snaunton) wrote :

Problem still exists with linux-image-4.2.0-30-generic .

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