Comment 29 for bug 1720930

I can confirm this behavior on 4.13 -> 4.15rc4 with Intel 9260NGW.

3b:00.0 Network controller: Intel Corporation Device 2526 (rev 29)
 Subsystem: Intel Corporation Device 0014
 Flags: bus master, fast devsel, latency 0, IRQ 17
 Memory at dd200000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: [c8] Power Management version 3
 Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
 Capabilities: [40] Express Endpoint, MSI 00
 Capabilities: [80] MSI-X: Enable+ Count=16 Masked-
 Capabilities: [100] Advanced Error Reporting
 Capabilities: [14c] Latency Tolerance Reporting
 Capabilities: [154] L1 PM Substates
 Kernel driver in use: iwlwifi
 Kernel modules: iwlwifi

Only happens when the adapter is disconnected. It is functional after a reconnect.

uname -r
4.15.0-041500rc4-generic

➜ ~ dmesg | grep -P 'firmware|iwlwifi|wlp59s0'
[ 2.197645] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_01.bin (v1.1)
[ 18.280244] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 18.282836] Bluetooth: hci0: Found device firmware: intel/ibt-18-16-1.sfi
[ 18.304357] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 18.313635] iwlwifi 0000:3b:00.0: enabling device (0000 -> 0002)
[ 18.346079] iwlwifi 0000:3b:00.0: loaded firmware version 34.0.0 op_mode iwlmvm
[ 18.368702] iwlwifi 0000:3b:00.0: Detected Intel(R) Dual Band Wireless AC 9260, REV=0x324
[ 18.423757] iwlwifi 0000:3b:00.0: base HW address: <redacted>
[ 18.516593] iwlwifi 0000:3b:00.0 wlp59s0: renamed from wlan0
[ 19.474561] Bluetooth: hci0: Waiting for firmware download to complete
[ 21.961162] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 22.162515] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 22.376361] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 22.550022] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 182.737439] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 182.814300] wlp59s0: authenticate with <redacted>
[ 182.823878] wlp59s0: send auth to <redacted> (try 1/3)
[ 182.862803] wlp59s0: authenticated
[ 182.866749] wlp59s0: associate with <redacted> (try 1/3)
[ 182.869577] wlp59s0: RX AssocResp from <redacted> (capab=0x511 status=0 aid=34)
[ 182.871828] wlp59s0: associated
[ 182.979380] IPv6: ADDRCONF(NETDEV_CHANGE): wlp59s0: link becomes ready
[ 588.512073] wlp59s0: deauthenticating from <redacted> by local choice (Reason: 3=DEAUTH_LEAVING)
[ 588.522598] wlp59s0: failed to remove key (1, ff:ff:ff:ff:ff:ff) from hardware (-22)
[ 595.913221] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 596.006391] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 599.531660] IPv6: ADDRCONF(NETDEV_UP): wlp59s0: link is not ready
[ 599.591620] wlp59s0: authenticate with <redacted>
[ 599.598771] wlp59s0: send auth to <redacted> (try 1/3)
[ 599.637989] wlp59s0: authenticated
[ 599.640025] wlp59s0: associate with <redacted> (try 1/3)
[ 599.643170] wlp59s0: RX AssocResp from <redacted> (capab=0x511 status=0 aid=35)
[ 599.645843] wlp59s0: associated
[ 599.718402] IPv6: ADDRCONF(NETDEV_CHANGE): wlp59s0: link becomes ready