@Wayne, TL;dr: simply remove backport-iwlwifi-dkms on your Eoan system with Intel AC 9260 installed.
First, "the entire system will freeze" is to be resolved in bug 1855825, which will fix backport-iwlwifi-dkms in Eoan/Focal for generic Ubuntu, and Bionic for OEM projects. Eventually generic Bionic will have the fix in bug 1856024. Second, the association failure problem when backport-iwlwifi-dkms is installed is currently a known issue in my list. Probably there is already a bug for it, takes some time to filter they out. TBD. At last, this (1855637/1855825) issue is caused by a mainline patch backported to stable kernels, which modifies data structure layout, and while DKMS packages may carry a copy of kernel headers that it uses, such different data layout may cause unexpected behaviors, and in this case, it hangs your system. Ubuntu kernels will merge stable patches, so all Ubuntu kernels with this patch included are affected. So it follows, if you're running a slightly older kernel, it will be fine; if you don't use backport-iwlwifi-dkms, it will be fine, too. DKMS is created to include features/fixes that are not currently in generic kernel "at the time". So it's not always "newer" than generic kernel. -- 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/1855637 Title: Intel AC 9260 (iwlwifi) completely unstable and halts cores in 19.10 Status in linux package in Ubuntu: Confirmed Bug description: After updating from 18.04 to 19.10, the entire system will freeze and eventually recover with many dmesg errors with backtraces and all sorts of errors around the iwlwifi module. I eventually restored to an 18.04 backup, but not before logging a lot of information and also validating that it reproduces with the 19.10 "Try Ubuntu" from the iso, so it certainly isn't an artifact of the upgrade (although ubuntu-drivers does appear a bit confused about iwlwifi when I did an upgrade, but that appears to be unrelated). It is worth noting that I also use the bluetooth module in this card, but it is connected via a cable to an internal USB 2 header to the system board and I believe it uses another driver entirely. I have additional external drives I can install test bed systems on to test fixes if need be, but it is worth noting that this is rock solid on 18.04.3 and the issue will reproduce within 15 minutes of watching youtube videos on 19.10. DMESG output from start of issues is attached. Wayne --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 19.10 InstallationDate: Installed on 2019-12-09 (0 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) MachineType: Gigabyte Technology Co., Ltd. Z97-HD3 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 nouveaudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-24-generic root=UUID=24f8119c-dff3-46da-9242-15c3b9c76355 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.3.0-24.26-generic 5.3.10 RelatedPackageVersions: linux-restricted-modules-5.3.0-24-generic N/A linux-backports-modules-5.3.0-24-generic N/A linux-firmware 1.183.2 Tags: eoan Uname: Linux 5.3.0-24-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 07/31/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F9 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z97-HD3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF9:bd07/31/2015:svnGigabyteTechnologyCo.,Ltd.:pnZ97-HD3:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ97-HD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: Z97-HD3 dmi.product.sku: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1855637/+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
