I upgraded my Dell 5520 laptop from Zesty to Artful over a month ago now, and I'm seeing behavior pretty much exactly as described by Max, starting immediately after the upgrade. I've been stuck either plugging into my wired ethernet adapter, tethering with my phone, or just living without connectivity because the wifi connection has been so unreliable. Sometimes (frequently right after a clean boot) it works just fine, and I'm having no problems meeting sustained, reliable, fast speeds for maybe a minute, but it breaks down pretty quickly (sometimes even just after just 10 to 15 seconds after wifi connects), and I see nothing but long windows of 100% packet loss. If I monitor long enough, it seems to recover for a brief window of time, but pretty quickly goes right back to 100% packet loss (in windows of maybe 30 seconds to a few minutes).
This has been observed even today with the latest 4.13.0-19-generic kernel. For the first week or two after the upgrade, I've been trying to determine if it was just limited to specific access points I was using, but I've observed this same behavior while connected to 3 different locations, with 3 wildly different wifi systems. I also thought it might be the wifi adapter drivers in a kernel upgrade (this laptop has a builtin Intel Wireless 8265 card, using iwlwifi), so I picked up an Archer T4UH V2 (based on the Realtek RTL8812AU chipset) just in case using a different wifi driver would be enough to have working wifi again, but I'm seeing the same behavior with that adapter as well. So it certainly seems related to wifi functionality only, but also not driver specific. -- 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/1722109 Title: iwlwifi regression in artful - intermittent total packet loss Status in linux package in Ubuntu: Incomplete Bug description: Recently I have been experiencing intermitted total packet loss over wifi. I've already been looking at another issue in which Bluetooth coexistence seems to be causing controller hardware to crash - bug 1719210 - so I'm rather suspicious of the updated iwlwifi microcode that is used by newer kernel versions. Unfortunately, I don't have a good reproduction recipe, as the fault doesn't seem to occur immediately after boot, nor is it an absolute failure of connectivity - from a user perspective, it feels like, for example, the website you are using is responding exceptionally slowly. It is only on testing multiple remote sites, and finding that rebooting into an earlier kernel fixes the issue, that it is apparent that it's a local OS problem. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-12-generic 4.13.0-12.13 ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3 Uname: Linux 4.13.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: maxb 1859 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Sun Oct 8 19:10:31 2017 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=635db8ca-b352-4622-87eb-08f74460324b InstallationDate: Installed on 2016-08-16 (418 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: HP HP Spectre Notebook ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-12-generic root=UUID=4989886a-f95e-4802-ab51-dcbf53167aeb ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-12-generic N/A linux-backports-modules-4.13.0-12-generic N/A linux-firmware 1.169 SourcePackage: linux UpgradeStatus: Upgraded to artful on 2017-08-31 (37 days ago) dmi.bios.date: 02/21/2017 dmi.bios.vendor: Insyde dmi.bios.version: F.31 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: 81A0 dmi.board.vendor: HP dmi.board.version: 48.54 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsyde:bvrF.31:bd02/21/2017:svnHP:pnHPSpectreNotebook:pvrType1ProductConfigId:rvnHP:rn81A0:rvr48.54:cvnHP:ct10:cvrChassisVersion: dmi.product.family: 103C_5335KV G=N L=CON B=HP S=SPT dmi.product.name: HP Spectre Notebook dmi.product.version: Type1ProductConfigId dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1722109/+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
