I'm facing a very similar or identical issue. I'm on a brand new Lenovo IdeaPad 110 with the same RTL8821AE wifi chip.
WiFi works at first but dies after a couple of minutes. If you wait for a long time it will recover. Ping behavior is similar to what's seen above, except the error message is "No buffer space available". Larry Finger's drivers do not fix the problem, nor does disabling power saving through module options as described above. I have a Linksys E2500 router. With 5 GHz disabled and 2.4 GHz set to Wireless-G Only mode, the laptop's WiFi works, but everything is really slow. The interface says it's running at 54 Mbps, but ping replies are being delayed by several seconds. SpeedTest says 19.71/0.43, which is the worst result I've ever seen on this WiFi network. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1577111 Title: RTL8821AE wireless adapter sporadically stuck (rtl8821ae module) Status in linux package in Ubuntu: Incomplete Bug description: In both 14.04, and 16.04, when connecting to my TP-Link TL-WR1043N v2 with custom firmware Gargoyle 1.8.1 (openwrt-based), it works for a few minutes, then traffic completely stop for a few minutes, then everything works again, for another few minutes. My device: 03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821AE 802.11ac PCIe Wireless Network Adapter [10ec:8821] Subsystem: AzureWave RTL8821AE 802.11ac PCIe Wireless Network Adapter [1a3b:2161] The following didn't change anything: $ cat /etc/modprobe.d/rtl8821ae.conf options rtl8821ae ips=0 fwlps=0 swlps=1 debug=5 msi=0 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-21-generic 4.4.0-21.37 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: gionn 2991 F.... pulseaudio /dev/snd/controlC2: gionn 2991 F.... pulseaudio /dev/snd/controlC0: gionn 2991 F.... pulseaudio CurrentDesktop: GNOME Date: Sun May 1 09:55:57 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2015-12-06 (146 days ago) InstallationMedia: Ubuntu-GNOME 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) MachineType: ASUSTeK COMPUTER INC. K30AD_M31AD_M51AD ProcEnviron: TERM=screen PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=it_IT.UTF-8 SHELL=/bin/zsh ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=e382fb70-6706-4f90-a4fe-9a2facc41e16 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-21-generic N/A linux-backports-modules-4.4.0-21-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-04-24 (6 days ago) dmi.bios.date: 04/02/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0507 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: K30AD_M31AD_M51AD_M32AD dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0507:bd04/02/2014:svnASUSTeKCOMPUTERINC.:pnK30AD_M31AD_M51AD:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnK30AD_M31AD_M51AD_M32AD:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: K30AD_M31AD_M51AD dmi.product.version: System Version dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1577111/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
