Same issue here on a Thinkoad P70, as a workaround I keep switching airplane mode on & off until the Wifi adapter gets detected again. Using bluetooth on this laptop is a bit erratic too (have to switch on & off multiple times). I've got the impression that it might be caused by some USB issue as my fingerprint reader is not always detected too.
Had this issue since Ubuntu 16, now running on 20.10 -- 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/1558252 Title: Intel 8260 / iwlwifi Occasionally unusuable after restart Status in linux package in Ubuntu: Confirmed Bug description: Hello, Some times my wifi card is inaccessible immediately after boot. Typically, restarting the machine or reloading the iwlwifi kernel module resolves the issue. dmesg on inaccessible card: [ 13.146917] iwlwifi 0000:04:00.0: Unsupported splx structure [ 13.147620] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-19.ucode failed with error -2 [ 13.147754] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-18.ucode failed with error -2 [ 13.147765] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-17.ucode failed with error -2 [ 13.154952] iwlwifi 0000:04:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm [ 13.191912] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208 [ 13.198415] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 13.199446] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 13.200661] iwlwifi 0000:04:00.0: can't access the RSA semaphore it is write protected [ 14.218185] iwlwifi 0000:04:00.0: SecBoot CPU1 Status: 0x3090003, CPU2 Status: 0x0 [ 14.218190] iwlwifi 0000:04:00.0: Failed to start INIT ucode: -110 [ 14.219090] iwlwifi 0000:04:00.0: Failed to run INIT ucode: -110 [ 14.219157] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-13-generic 4.4.0-13.29 ProcVersionSignature: Ubuntu 4.4.0-13.29-generic 4.4.5 Uname: Linux 4.4.0-13-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ryan 1999 F.... pulseaudio Date: Wed Mar 16 12:00:48 2016 HibernationDevice: RESUME=UUID=04e04e17-3976-4daa-a1dd-2dd369aee83d InstallationDate: Installed on 2015-09-21 (176 days ago) InstallationMedia: It IwConfig: enp0s31f6 no wireless extensions. lo no wireless extensions. Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 20FNCTO1WW ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-13-generic root=/dev/mapper/it--vg-root ro quiet intel_pstate=no_hwp PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.4.0-13-generic N/A linux-backports-modules-4.4.0-13-generic N/A linux-firmware 1.156 RfKill: 0: tpacpi_bluetooth_sw: Bluetooth Soft blocked: yes Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-02-24 (20 days ago) dmi.bios.date: 01/05/2016 dmi.bios.vendor: LENOVO dmi.bios.version: R06ET33W (1.07 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FNCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrR06ET33W(1.07):bd01/05/2016:svnLENOVO:pn20FNCTO1WW:pvrThinkPadT460:rvnLENOVO:rn20FNCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20FNCTO1WW dmi.product.version: ThinkPad T460 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1558252/+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
