Summary; my own rtl8821ae frequent connection lost problem was fixed by
upstream patch b8b8b16352cd ("rtlwifi: rtl8821ae: Fix connection lost
problem") merged for 4.14-rc4.
I've recently fixed a problem very much like the problems reported in
this bug. In particular the loss of WiFi scan results, and the
connection loss on a burst of download data. Workaround was to turn
wireless off then on again (using rfkill), or reboot. What I did was
(a) test several ubuntu kernels to find which ones were affected,
(b) using git bisect, tested several custom kernels, and proved my
problem began with a single commit 40b368af4b75 ("rtlwifi: Fix alignment
issues"),
(c) worked with upstream to determine a likely cause; the commit wasn't
widely tested,
(d) proved through testing that the BIOS can have an effect; because the
rtl8821ae driver does not reset the card, but inherits the card in
whatever state the BIOS left it. This can randomise problem reports.
(e) proved that a power down and reboot can have a different effect to a
warm reboot; some of the wireless card device registers are unchanged on
warm reboot. This can randomise problem reports.
Hope that helps.
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https://bugs.launchpad.net/bugs/1622293
Title:
rtl8821ae WiFI does not work
Status in linux package in Ubuntu:
Triaged
Bug description:
rtl8821ae does not work out-of the box on Ubuntu 16.04. It does not
detect any WIFi networks and laptop starts with Wifi disabled in
NetworkManager. To make rtl8821ae work I have to do the following:
echo "blacklist ideapad_laptop" | sudo tee /etc/modprobe.d/idepad.conf
After that rtl8821ae loses connection occasionally. None of those helped:
echo rtl8812ae >> /etc/modules
echo "options rtl8821ae ips=0 fwlps=0" | sudo tee
/etc/modprobe.d/rtl8821ae.conf
sudo modprobe -r rtl8821ae && sudo modprobe rtl8821ae
options rtl8821ae ips=0 swenc=1 debug=5 msi=0
sudo iw dev wlp2s0 set power_save off
Installing new driver from here
https://github.com/lwfinger/rtlwifi_new did not help.
Issue close to this one was reported here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1526683
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-36-generic 4.4.0-36.55
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: antoshkka 3397 F.... pulseaudio
/dev/snd/controlC0: antoshkka 3397 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Sep 11 10:09:39 2016
HibernationDevice: RESUME=UUID=de96877a-7ace-47cc-ac4c-b4662a72a1b7
InstallationDate: Installed on 2016-09-10 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
MachineType: LENOVO 80NY
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed
root=UUID=d62213ac-da8e-417a-83fb-b8163b78199b ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-36-generic N/A
linux-backports-modules-4.4.0-36-generic N/A
linux-firmware 1.157.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/15/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: CECN43WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Allsparks 5B
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40688 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad Y700-15ACZ
dmi.modalias:
dmi:bvnLENOVO:bvrCECN43WW:bd09/15/2015:svnLENOVO:pn80NY:pvrLenovoideapadY700-15ACZ:rvnLENOVO:rnAllsparks5B:rvrSDK0J40688WIN:cvnLENOVO:ct10:cvrLenovoideapadY700-15ACZ:
dmi.product.name: 80NY
dmi.product.version: Lenovo ideapad Y700-15ACZ
dmi.sys.vendor: LENOVO
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