Ping Sendmsg No Buffer Space Available Solved Assignment

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Computer: Lenovo IdeaPad 110
WiFi AP: Linksys E2500 v1.0 with firmware v2.0.00

After a few minutes of mixed Internet use, the WiFi hangs and the interface ceases to pass traffic:

64 bytes from icmp_seq=281 ttl=55 time=12.8 ms
64 bytes from icmp_seq=282 ttl=55 time=12.5 ms
64 bytes from icmp_seq=283 ttl=55 time=58.4 ms
64 bytes from icmp_seq=284 ttl=55 time=68.0 ms
64 bytes from icmp_seq=285 ttl=55 time=65.6 ms
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
--- ping statistics ---
314 packets transmitted, 283 received, 9% packet loss, time 366615ms
rtt min/avg/max/mdev = 11.423/177.382/7227.733/806.648 ms, pipe 8

Before the driver hangs, speeds are 30/5 Mbps despite a 75 Mbps WiFi transmit rate and a 70/70 Mbps symmetrical fiber connection in the house. The connection and the router are known to perform better than this with other equipment.

Forcing the router into 802.11g mode does, at least at a cursory glance, seem to mitigate the halting problem, but speeds remain abysmal.

If there is any kind of technically involved tests I can do to speed up the debugging of this problem, let me know. I have some experience with embedded development in C.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-34-generic 4.4.0-34.53
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
 /dev/snd/controlC1: thor 3179 F.... pulseaudio
 /dev/snd/controlC0: thor 3179 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Aug 30 01:36:22 2016
HibernationDevice: RESUME=UUID=a482ae0a-dd87-41de-be2c-50541edcfa53
InstallationDate: Installed on 2016-08-29 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 80TJ
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-34-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
 linux-restricted-modules-4.4.0-34-generic N/A
 linux-backports-modules-4.4.0-34-generic N/A
 linux-firmware 1.157.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install) 03/24/2016
dmi.bios.vendor: Lenovo
dmi.bios.version: 1QCN16WW
dmi.board.asset.tag: No Asset Tag Nano 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 110-15ACL
dmi.modalias: dmi:bvnLenovo:bvr1QCN16WW:bd03/24/2016:svnLENOVO:pn80TJ:pvrLenovoideapad110-15ACL:rvnLENOVO:rnNano5A8:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrLenovoideapad110-15ACL: 80TJ
dmi.product.version: Lenovo ideapad 110-15ACL
dmi.sys.vendor: LENOVO

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