Hi I'm affected as well. I had hoped that the HWE kernel would somehow magically make things better but it doesn't.
System is a Lenovo T580 with Dual Band Wireless AC 8265 Attaching dmesg section where the wifi crashes Interesting lines: 529 [293336.199635] iwlwifi 0000:04:00.0: loaded firmware version 36.e91976c0.0 op_mode iwlmvm 530 [293336.199661] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230 531 [293336.261557] iwlwifi 0000:04:00.0: base HW address: 18:1d:ea:2d:5e:2e 540 [293340.092557] iwlwifi 0000:04:00.0: Microcode SW error detected. Restarting 0x2000000. 649 [293340.832903] iwlwifi 0000:04:00.0: Firmware error during reconfiguration - reprobe! 650 [293340.832931] iwlwifi 0000:04:00.0: iwlwifi transaction failed, dumping registers 733 [293340.836537] WARNING: CPU: 1 PID: 22378 at /build/linux-hwe-jDoxDp/linux-hwe-4.18.0/net/mac80211/driver-ops.h:19 drv_remove_interface+0xfe/0x110 [mac80211] (Repeats) ** Attachment added: "wifi-issues.log" https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1804841/+attachment/5228437/+files/wifi-issues.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1804841 Title: iwlwifi Microcode SW error detected. Restarting 0x2000000. Status in linux-firmware package in Ubuntu: Confirmed Bug description: This seems to be a return of an existing bug, in newer hardware and microcode versions. Wireless card: Intel Corporation Wireless 8265 / 8275 [8086:24fd] (rev 78) Firmware version: 34.0.1 Description: Ubuntu 18.04.1 LTS Frequent errors as soon as I connect to wifi: Microcode SW error detected. Restarting 0x2000000. Expected to happen: Great and stable wifi like a couple of weeks ago What happens: very slow, intermittent internet access, lots of ping loss Found a suggestion of a workaround: adding these lines to /etc/NetworkManager/NetworkManager.conf [device] wifi.scan-rand-mac-address=no These lines were already there, not added by me. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-firmware 1.173.2 [modified: lib/firmware/iwlwifi-8265-36.ucode] ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18 Uname: Linux 4.15.0-39-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 Date: Fri Nov 23 15:23:54 2018 Dependencies: InstallationDate: Installed on 2018-09-03 (81 days ago) InstallationMedia: Kubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) PackageArchitecture: all SourcePackage: linux-firmware UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1804841/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp