Just tried the mainstream kernel "4.10.0-041000rc5-lowlatency" as mentioned above and I do confirm the very same problem exists there too.
Just to give a hint - this regression was introduced approximately in the first two weeks of 2017, so it shouldn't be that difficult to trace back the change, which could then point to the actual root cause. -- 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/1658016 Title: Intel AC7260 wireless (iwlwifi) stops working after computer sleep/wakeup Status in linux package in Ubuntu: Confirmed Bug description: Since about the beginning of 2017 the Intel AC7260 wireless card on my Asus UX501 stops working correctly when the computer suspends to RAM and wakes up again (laptop lid closed and opened). The message is: [ 7679.281856] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready The only way to come around this problem is to re-insert the iwlwifi module: sudo modprobe -r iwlwifi; sudo modprobe iwlwifi To be more precise what it means stops working: The wifi does not see the networks correctly. nm-applet reports only one of many networks in my area. My network is not there and it does not connect. I used to have the problem rarely in the past. However it happened only occasionally and I could live with the above workaround. Since about the beginning of 2017 it happens __always__. Not sure, which update exactly caused it, but you can imagine how annoying it is. I would appreciate if it could be fixed. Thanks! Here is the relevant dmesg log: [ 7679.149644] PM: resume of devices complete after 737.622 msecs [ 7679.150241] PM: Finishing wakeup. [ 7679.150242] Restarting tasks ... done. [ 7679.163190] Bluetooth: hci0: read Intel version: 3707100180012d0d00 [ 7679.163197] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq [ 7679.188077] bbswitch: disabling discrete graphics [ 7679.188089] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150930/nsarguments-95) [ 7679.279490] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 7679.280238] asix 3-3:1.0 eth0: link down [ 7679.280695] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 7679.281856] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 7679.281960] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7679.282220] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7679.342219] Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated [ 7679.467403] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7679.467709] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7679.483163] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 7679.549503] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 7700.394009] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7700.544809] cfg80211: World regulatory domain updated: [ 7700.544812] cfg80211: DFS Master region: unset [ 7700.544812] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) [ 7700.544814] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) [ 7700.544815] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) [ 7700.544816] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A) [ 7700.544817] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) [ 7700.544818] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s) [ 7700.544819] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s) [ 7700.544820] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) [ 7700.544821] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A) [ 7700.545380] Intel(R) Wireless WiFi driver for Linux [ 7700.545382] Copyright(c) 2003- 2015 Intel Corporation [ 7700.546038] iwlwifi 0000:3b:00.0: loaded firmware version 17.352738.0 op_mode iwlmvm [ 7700.557859] iwlwifi 0000:3b:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144 [ 7700.557914] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7700.558147] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7700.741439] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' [ 7700.747514] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 7700.747609] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7700.747849] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7700.931190] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7700.931425] iwlwifi 0000:3b:00.0: L1 Disabled - LTR Enabled [ 7700.946613] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 7700.999856] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-extra-4.4.0-62-generic 4.4.0-62.83 ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40 Uname: Linux 4.4.0-62-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: brain 2827 F.... pulseaudio /dev/snd/controlC0: brain 2827 F.... pulseaudio CurrentDesktop: Unity Date: Fri Jan 20 09:51:58 2017 HibernationDevice: RESUME=UUID=5165b586-2b44-4e4b-be49-177090e3b609 InstallationDate: Installed on 2015-05-26 (604 days ago) InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: ASUSTeK COMPUTER INC. N501JW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-62-generic root=UUID=299cfed8-e49e-40d4-a8dd-fd66089e6d8a ro quiet splash iwlwifi.power_save=1 iwlwifi.power_level=5 acpi_osi= acpi_backlight=vendor acpi_enforce_resources=lax acpi=force nmi_watchdog=0 drm.vblankoffdelay=1 i915.semaphores=1 i915.enable_rc6=7 i915.lvds_downclock=1 rcutree.rcu_idle_gp_delay=1 pcie_aspm=force i915.enable_psr=1 i915.enable_fbc=1 i915.disable_power_well=1 vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-62-generic N/A linux-backports-modules-4.4.0-62-generic N/A linux-firmware 1.157.8 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/03/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N501JW.210 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N501JW dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: ATN12345678901234567 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN501JW.210:bd08/03/2015:svnASUSTeKCOMPUTERINC.:pnN501JW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN501JW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N501JW dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. 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