There are lots of new commits in iwlwifi since v4.17-rc6. Please wait for v4.18-rc1 and give it a try.
If the issue still happen, file a bug at https://bugzilla.kernel.org/enter_bug.cgi?product=Drivers, component: network-wireless. -- 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/1772154 Title: Unstable WiFi adapter Gigabyte GC-WB867D-I Status in linux package in Ubuntu: Confirmed Bug description: The WiFi adapter Gigabyte GC-WB867D-I is quite unstable on Ubuntu 18.04. I do not have data relative to previous versions of Ubuntu since this PCIe card is part of a new build that has had 18.04 as the first installed version. The reason why I can point the finger at the Linux kernel is that the card seems to work reliably well on Windows 10 (no packet loss when pinging the local router). On Ubuntu 18.04, the card's behaviour seems very correlated to the signal strength and exhibits a threshold phenomenon. With the antenna placed in an obstacle-free area, some ping packets are occasionally lost. But when some objects are placed near the antenna (e.g. a phone), the packet loss can get up to 90%. Under the very same conditions, the packet loss on Windows is exactly 0 (and the RTT never gets above 500ms). I have disabled the WiFi power saving (changed from 2 to 3) but that didn't fix the problem. It seems that restarting the NetworkManager service helps for a bit, but after a while the problem resurfaces. The card in question has onboard USB Bluetooth and is pretty much an M.2 to PCIe x1 adapter for an Intel Wifi adapter. The relevant output of lspci is 03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78) ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-20-generic 4.15.0-20.21 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat May 19 10:32:00 2018 InstallationDate: Installed on 2018-04-29 (19 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: linux-signed UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC1D7p: gabriele 1893 F...m pulseaudio /dev/snd/controlC1: gabriele 1893 F.... pulseaudio /dev/snd/controlC0: gabriele 1893 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=d2390d6b-2bc3-41bb-b385-3dd8921a36e2 InstallationDate: Installed on 2018-04-29 (22 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. NonfreeKernelModules: nvidia_modeset nvidia Package: linux (not installed) ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=2e79827f-410a-4aba-ab8f-e278ca6e7aa3 ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 03/07/2018 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.10 dmi.board.name: B360M Pro4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.10:bd03/07/2018:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB360MPro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1772154/+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
