I experienced this bug as well after update to Ubuntu 19.04. Tried newest firmware -29 (and also -27, -22) which does not work either. Tried to go back to -21, but this seems to be no longer supported by the driver.
What seems to help for me is to set bt_coex_active=0, maybe you want to try that as well. If you file a bug on kernel.org, please post a link over here for reference. Thanks! Stefan -- 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/1825993 Title: iwlwifi microcode error detected using hostapd with Intel 3168 in a NUC6CAYH Status in linux-firmware package in Ubuntu: Incomplete Bug description: I found a similar, fixed, bug with another Intel chip. I believe the upstream fix from Intel addressed my 3168, but it looks like the fix released in linux-firmware only addresses the 8265. https://bugs.launchpad.net/ubuntu/+bug/1808389 I only see this occur in AP mode, and not in managed mode (i.e., hostapd triggers it, but wpa_supplicant does not). The following repeats a couple times a second indefinitely: /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.817625] iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x2000000. /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.818642] iwlwifi 0000:02:00.0: Start IWL Error Log Dump: /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.819698] iwlwifi 0000:02:00.0: Status: 0x00000100, count: 6 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.821046] iwlwifi 0000:02:00.0: Loaded firmware version: 27.541033.0 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.822370] iwlwifi 0000:02:00.0: 0x00003068 | ADVANCED_SYSASSERT /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.823725] iwlwifi 0000:02:00.0: 0x00000230 | trm_hw_status0 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.825086] iwlwifi 0000:02:00.0: 0x00000000 | trm_hw_status1 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.826426] iwlwifi 0000:02:00.0: 0x00043D2C | branchlink2 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.827790] iwlwifi 0000:02:00.0: 0x0004AEDE | interruptlink1 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.828751] iwlwifi 0000:02:00.0: 0x00000000 | interruptlink2 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.829679] iwlwifi 0000:02:00.0: 0x00000064 | data1 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.830606] iwlwifi 0000:02:00.0: 0x00000032 | data2 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.831523] iwlwifi 0000:02:00.0: 0x000000FF | data3 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.832442] iwlwifi 0000:02:00.0: 0x00000000 | beacon time /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.833355] iwlwifi 0000:02:00.0: 0x0002920C | tsf low /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.834266] iwlwifi 0000:02:00.0: 0x00000000 | tsf hi /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.835177] iwlwifi 0000:02:00.0: 0x00000000 | time gp1 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.836098] iwlwifi 0000:02:00.0: 0x0002920C | time gp2 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.837013] iwlwifi 0000:02:00.0: 0x00000001 | uCode revision type /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.837939] iwlwifi 0000:02:00.0: 0x0000001B | uCode version major /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.838864] iwlwifi 0000:02:00.0: 0x00084169 | uCode version minor /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.839792] iwlwifi 0000:02:00.0: 0x00000220 | hw version /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.840715] iwlwifi 0000:02:00.0: 0x00C89200 | board version /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.841660] iwlwifi 0000:02:00.0: 0x0028011C | hcmd /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.842605] iwlwifi 0000:02:00.0: 0x24022000 | isr0 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.843545] iwlwifi 0000:02:00.0: 0x01000000 | isr1 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.844498] iwlwifi 0000:02:00.0: 0x00000002 | isr2 /var/log/syslog.5.gz:Apr 18 15:59:54 pinot kernel: [137784.845435] iwlwifi 0000:02:00.0: 0x4041FCC0 | isr3 lshw output: *-network description: Wireless interface product: Dual Band Wireless-AC 3168NGW [Stone Peak] vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlp2s0 version: 10 serial: a0:a4:c5:7a:8f:64 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=4.15.0-47-generic firmware=27.541033.0 ip=192.168.1.37 latency=0 link=yes multicast=yes wireless=IEEE 802.11 resources: irq:131 memory:91200000-91201fff top of output from 'iw list': Wiphy phy0 max # scan SSIDs: 20 max scan IEs length: 425 bytes max # sched scan SSIDs: 20 max # match sets: 11 max # scan plans: 2 max scan plan interval: 65535 max scan plan iterations: 254 Retry short limit: 7 Retry long limit: 4 Coverage class: 0 (up to 0m) Device supports RSN-IBSS. Device supports AP-side u-APSD. Device supports T-DLS. Supported Ciphers: * WEP40 (00-0f-ac:1) * WEP104 (00-0f-ac:5) * TKIP (00-0f-ac:2) * CCMP-128 (00-0f-ac:4) * CMAC (00-0f-ac:6) Available Antennas: TX 0 RX 0 Supported interface modes: * IBSS * managed * AP * AP/VLAN * monitor * P2P-client * P2P-GO * P2P-device output from 'lsb_release -rd': Description: Ubuntu 18.04.2 LTS Release: 18.04 > apt-cache policy linux-firmware linux-firmware: Installed: 1.173.3 Candidate: 1.173.3 Version table: *** 1.173.3 500 500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu bionic-security/main amd64 Packages 100 /var/lib/dpkg/status 1.173 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-firmware 1.173.3 ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18 Uname: Linux 4.15.0-47-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 Date: Tue Apr 23 13:25:29 2019 Dependencies: PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash 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/1825993/+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
