After a bit of searching I found this kernel bug which looks related, from last year. The symptoms are the same, and the error is extremely similar, but for a slightly different chip/firmware combination handled by the same driver
https://bugzilla.kernel.org/show_bug.cgi?id=204167 Therefore I guess it might be one or more of 1 - the same bug, coming to ubuntu delayed 2 - a regression - reintroducing a bug that was previously fixed 3 - a "related/similar bug" reintroducing the same erroneous behaviour on a different firmware/hardware combo since it seems firmware related, here is my current: apt-cache policy linux-firmware linux-firmware: Installed: 1.173.18 Candidate: 1.173.18 Version table: *** 1.173.18 500 500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages 500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages 500 http://security.ubuntu.com/ubuntu bionic-security/main i386 Packages 100 /var/lib/dpkg/status 1.173 500 500 http://de.archive.ubuntu.com/ubuntu bionic/main amd64 Packages 500 http://de.archive.ubuntu.com/ubuntu bionic/main i386 Packages ** Bug watch added: Linux Kernel Bug Tracker #204167 https://bugzilla.kernel.org/show_bug.cgi?id=204167 -- 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/1880426 Title: WIFI failure - iwlwifi Microcode SW error detected Status in linux package in Ubuntu: Confirmed Bug description: Ever since the previous to last apt-get upgrade, my wifi has become very unstable. After a few minutes to every few hours, the WIFI connection becomes completely unresponsive with any further packets timing out, and any attempt to (re-)connect to any AP being impossible. Wifi can only be recovered by turning wifi completely off in the menu and back on, or by a system reboot. System cold reboot after upgrade did not help. As far as I can recall the bug first appeared with linux-modules-extra-4.15.0-99-generic, but was not present prior to that. The bug is currently present on the system after apt upgrade to linux- modules-extra-4.15.0-101-generic. dmesg|grep iwlwifi: [ 14.623738] iwlwifi 0000:02:00.0: loaded firmware version 34.0.1 op_mode iwlmvm [ 14.662856] iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208 [ 14.754145] iwlwifi 0000:02:00.0: base HW address: 28:16:ad:9b:7e:27 [ 14.937064] iwlwifi 0000:02:00.0 wlp2s0: renamed from wlan0 [18635.796270] iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x2000000. [18635.796433] iwlwifi 0000:02:00.0: Start IWL Error Log Dump: [18635.796444] iwlwifi 0000:02:00.0: Status: 0x00000100, count: 6 [18635.796452] iwlwifi 0000:02:00.0: Loaded firmware version: 34.0.1 [18635.796462] iwlwifi 0000:02:00.0: 0x00000071 | ADVANCED_SYSASSERT [18635.796470] iwlwifi 0000:02:00.0: 0x00000230 | trm_hw_status0 [18635.796478] iwlwifi 0000:02:00.0: 0x00000000 | trm_hw_status1 [18635.796486] iwlwifi 0000:02:00.0: 0x0002395C | branchlink2 [18635.796493] iwlwifi 0000:02:00.0: 0x0003867A | interruptlink1 [18635.796500] iwlwifi 0000:02:00.0: 0x0003867A | interruptlink2 [18635.796507] iwlwifi 0000:02:00.0: 0x00000000 | data1 [18635.796515] iwlwifi 0000:02:00.0: 0x00001000 | data2 [18635.796522] iwlwifi 0000:02:00.0: 0x07830000 | data3 [18635.796530] iwlwifi 0000:02:00.0: 0x73C18DA9 | beacon time [18635.796537] iwlwifi 0000:02:00.0: 0x4816439E | tsf low [18635.796545] iwlwifi 0000:02:00.0: 0x0000014C | tsf hi [18635.796552] iwlwifi 0000:02:00.0: 0x00000000 | time gp1 [18635.796559] iwlwifi 0000:02:00.0: 0x55BF8308 | time gp2 [18635.796567] iwlwifi 0000:02:00.0: 0x00000001 | uCode revision type [18635.796574] iwlwifi 0000:02:00.0: 0x00000022 | uCode version major [18635.796582] iwlwifi 0000:02:00.0: 0x00000000 | uCode version minor [18635.796589] iwlwifi 0000:02:00.0: 0x00000201 | hw version [18635.796596] iwlwifi 0000:02:00.0: 0x00C89008 | board version [18635.796604] iwlwifi 0000:02:00.0: 0x0000001C | hcmd [18635.796611] iwlwifi 0000:02:00.0: 0x24022000 | isr0 [18635.796618] iwlwifi 0000:02:00.0: 0x01800000 | isr1 [18635.796625] iwlwifi 0000:02:00.0: 0x08001802 | isr2 [18635.796632] iwlwifi 0000:02:00.0: 0x004178C1 | isr3 [18635.796640] iwlwifi 0000:02:00.0: 0x00000001 | isr4 [18635.796647] iwlwifi 0000:02:00.0: 0x005F019C | last cmd Id [18635.796654] iwlwifi 0000:02:00.0: 0x00000000 | wait_event [18635.796662] iwlwifi 0000:02:00.0: 0x00000080 | l2p_control [18635.796669] iwlwifi 0000:02:00.0: 0x00010030 | l2p_duration [18635.796676] iwlwifi 0000:02:00.0: 0x0000003F | l2p_mhvalid [18635.796683] iwlwifi 0000:02:00.0: 0x000000CE | l2p_addr_match [18635.796691] iwlwifi 0000:02:00.0: 0x0000000D | lmpm_pmg_sel [18635.796698] iwlwifi 0000:02:00.0: 0x30101341 | timestamp [18635.796706] iwlwifi 0000:02:00.0: 0x00340818 | flow_handler [18635.796901] iwlwifi 0000:02:00.0: Start IWL Error Log Dump: [18635.796909] iwlwifi 0000:02:00.0: Status: 0x00000100, count: 7 [18635.796917] iwlwifi 0000:02:00.0: 0x00100116 | ADVANCED_SYSASSERT [18635.796924] iwlwifi 0000:02:00.0: 0x00000000 | umac branchlink1 [18635.796932] iwlwifi 0000:02:00.0: 0xC0086A78 | umac branchlink2 [18635.796940] iwlwifi 0000:02:00.0: 0xC0083C90 | umac interruptlink1 [18635.796947] iwlwifi 0000:02:00.0: 0x00000000 | umac interruptlink2 [18635.796954] iwlwifi 0000:02:00.0: 0xDEADBEEF | umac data1 [18635.796961] iwlwifi 0000:02:00.0: 0xDEADBEEF | umac data2 [18635.796969] iwlwifi 0000:02:00.0: 0xDEADBEEF | umac data3 [18635.796976] iwlwifi 0000:02:00.0: 0x00000022 | umac major [18635.796983] iwlwifi 0000:02:00.0: 0x00000000 | umac minor [18635.796990] iwlwifi 0000:02:00.0: 0xC0887F60 | frame pointer [18635.796998] iwlwifi 0000:02:00.0: 0xC0887F60 | stack pointer [18635.797005] iwlwifi 0000:02:00.0: 0x005F019C | last host cmd [18635.797012] iwlwifi 0000:02:00.0: 0x00000020 | isr status reg lsb_release -a Distributor ID: Ubuntu Description: Ubuntu 18.04.4 LTS Release: 18.04 Codename: bionic uname -a Linux CorvusMC4 4.15.0-101-generic #102-Ubuntu SMP Mon May 11 10:07:26 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux apt-cache policy linux-modules-extra-4.15.0-101-generic linux-modules-extra-4.15.0-101-generic: Installed: 4.15.0-101.102 Candidate: 4.15.0-101.102 Version table: *** 4.15.0-101.102 500 500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-modules-extra-4.15.0-101-generic 4.15.0-101.102 ProcVersionSignature: Ubuntu 4.15.0-101.102-generic 4.15.18 Uname: Linux 4.15.0-101-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.14 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: raven 2434 F.... pulseaudio CurrentDesktop: XFCE Date: Sun May 24 19:17:14 2020 EcryptfsInUse: Yes HibernationDevice: #RESUME=UUID=de4646dc-eb1a-4530-b6bc-df659b641728 RESUME=none InstallationDate: Installed on 2017-04-28 (1122 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) MachineType: FUJITSU LIFEBOOK E736 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-101-generic root=/dev/mapper/ubuntu--vg-root ro "acpi_osi=!Windows 2012" RelatedPackageVersions: linux-restricted-modules-4.15.0-101-generic N/A linux-backports-modules-4.15.0-101-generic N/A linux-firmware 1.173.18 SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2019-06-28 (331 days ago) dmi.bios.date: 12/20/2016 dmi.bios.vendor: FUJITSU // Insyde Software Corp. dmi.bios.version: Version 1.22 dmi.board.name: FJNB293 dmi.board.vendor: FUJITSU dmi.board.version: M4 dmi.chassis.type: 10 dmi.chassis.vendor: FUJITSU dmi.chassis.version: LIFEBOOK E736 dmi.modalias: dmi:bvnFUJITSU//InsydeSoftwareCorp.:bvrVersion1.22:bd12/20/2016:svnFUJITSU:pnLIFEBOOKE736:pvr10601115935:rvnFUJITSU:rnFJNB293:rvrM4:cvnFUJITSU:ct10:cvrLIFEBOOKE736: dmi.product.family: LIFEBOOK-FTS dmi.product.name: LIFEBOOK E736 dmi.product.version: 10601115935 dmi.sys.vendor: FUJITSU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1880426/+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
