Intel 9260/9462/9560 can't connect to 5GHz AP

[AceLan Kao]

With 1009 oem(v4.13) kernel and latest linux-firmware[1], it connect to 2.4GHz APs without any issues.
But it fails to connect 5GHz APs.

It stucks when I select a 5GHz network AP, and after timeout it
connects to another configured 2.4GHz AP.
[ 512.404139] wlp0s20f3: authenticate with 2c:36:f8:fa:ec:00
[ 512.410781] wlp0s20f3: send auth to 2c:36:f8:fa:ec:00 (try 1/3)
[ 512.449561] wlp0s20f3: authenticated
[ 512.450625] wlp0s20f3: associate with 2c:36:f8:fa:ec:00 (try 1/3)
[ 512.452010] wlp0s20f3: RX AssocResp from 2c:36:f8:fa:ec:00
(capab=0x111 status=0 aid=8)
[ 512.454501] wlp0s20f3: associated
[ 512.542439] wlp0s20f3: Limiting TX power to 27 (30 - 3) dBm as
advertised by 2c:36:f8:fa:ec:00
[ 557.685247] wlp0s20f3: deauthenticating from 2c:36:f8:fa:ec:00 by
local choice (Reason: 3=DEAUTH_LEAVING)
[ 557.695875] wlp0s20f3: failed to remove key (1, ff:ff:ff:ff:ff:ff)
from hardware (-22)

1. c4276b6 (tag: refs/tags/iwlwifi-fw-2017-11-03) iwlwifi: add firmware version 33 for new 9000 series

[AceLan Kao (acelankao)]

https://bugzilla.kernel.org/show_bug.cgi?id=198083

From developer, the below 2 patches fix the 5GHz network issue.
https://patchwork.kernel.org/patch/10088929/
https://patchwork.kernel.org/patch/10088939/

[AceLan Kao (acelankao)]

The 2 patches can be found here, they have CC'ed stable, so they will be in artful kernel someday.

git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes.git

Author: Sara Sharon <email address hidden>
Date: Mon Feb 8 23:30:47 2016 +0200

    iwlwifi: mvm: mark MIC stripped MPDUs

    When RADA is active, the hardware decrypts the packets and strips off
    the MIC as it is useless after decryption. Indicate that to mac80211.

    Cc: <email address hidden> # 4.13+
    [this is needed for the 9000-series HW to work properly]
    Signed-off-by: Sara Sharon <email address hidden>
    Signed-off-by: Luca Coelho <email address hidden>

commit 9d0fc5a50a0548f8e5d61243e5e5f26d5c405aef
Author: David Spinadel <email address hidden>
Date: Mon Nov 21 17:01:25 2016 +0200

    iwlwifi: mvm: enable RX offloading with TKIP and WEP

    Set the flag that indicates that ICV was stripped on if
    this option was enabled in the HW.

    Cc: <email address hidden> # 4.13+
    [this is needed for the 9000-series HW to work properly]
    Signed-off-by: David Spinadel <email address hidden>
    Signed-off-by: Luca Coelho <email address hidden>

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem - 4.13.0-1017.18

---------------
linux-oem (4.13.0-1017.18) xenial; urgency=low

  * linux-oem: 4.13.0-1017.18 -proposed tracker (LP: #1743418)

  * Realtek card reader - RTS5243 [VEN_10EC&DEV_5260] (LP: #1737673)
    - mmc: rtsx: fix tuning fail on gen3 PCI-Express
    - mfd: rts5249: Add support for RTS5250S power saving
    - misc: rtsx: Move Realtek Card Reader Driver to misc
    - misc: rtsx: Add support for RTS5260
    - misc: rtsx: Fix symbol clashes
    - [Config] update configs for RTSX

  * Realtek card reader power consumption issue (LP: #1743516)
    - mfd: Fix RTS5227 (and others) powermanagement

  [ Ubuntu: 4.13.0-30.33 ]

  * linux: 4.13.0-30.33 -proposed tracker (LP: #1743412)
  * Do not duplicate changelog entries assigned to more than one bug or CVE
    (LP: #1743383)
    - [Packaging] git-ubuntu-log -- handle multiple bugs/cves better
  * Unable to handle kernel NULL pointer dereference at isci_task_abort_task
    (LP: #1726519)
    - Revert "scsi: libsas: allow async aborts"
  * CVE-2017-5715 // CVE-2017-5753
    - SAUCE: x86/microcode: Extend post microcode reload to support IBPB feature
      -- repair missmerge
    - Revert "x86/svm: Add code to clear registers on VM exit"
    - kvm: vmx: Scrub hardware GPRs at VM-exit

linux-oem (4.13.0-1016.17) xenial; urgency=low

  * linux-oem: 4.13.0-1016.17 -proposed tracker (LP: #1742728)

  * Add support for Realtek Bluetooth device [0bda:b00a] (LP: #1742613)
    - SAUCE: Import Bluetooth driver for Realtek 8821CE
    - SAUCE: Make rtl8821ce-bt work with 0bda:b00a only
    - SAUCE: rtl8821ce-bt: append device ID to config filename
    - SAUCE: bluetooth: Blacklist 0bda:b00a
    - SAUCE: build ubuntu/rtl8821ce-bt for x86 only

  * Add support for Realtek WiFi device [10ec:c821] (LP: #1740231)
    - SAUCE: Import RTL8821CE driver
    - SAUCE: Add ubuntu/rtl8821ce into build script
    - SAUCE: Sync ubuntu/rtl8821ce with a new release from Realtek

  * External HDMI monitor failed to show screen on Lenovo X1 series
    (LP: #1738523)
    - SAUCE: drm/i915: Disable writing of TMDS_OE on Lenovo ThinkPad X1 series

  * Support realtek new codec alc257 in the alsa hda driver (LP: #1738911)
    - ALSA: hda/realtek - New codec support for ALC257

  * QCA Rome bluetooth can not wakeup after USB runtime suspended.
    (LP: #1737890)
    - Bluetooth: btusb: driver to enable the usb-wakeup feature

  * Intel 9260/9462/9560 can't connect to 5GHz AP (LP: #1736639)
    - iwlwifi: mvm: enable RX offloading with TKIP and WEP
    - iwlwifi: mvm: mark MIC stripped MPDUs

  * [Artful][Wyse 3040] System hang when trying to enable an offlined CPU core
    (LP: #1736393)
    - SAUCE: drm/i915:Don't set chip specific data
    - SAUCE: drm/i915: make previous commit affects Wyse 3040 only

  * Touchpad stops working after a few seconds in Lenovo ideapad 320
    (LP: #1732056)
    - pinctrl/amd: fix masking of GPIO interrupts

  [ Ubuntu: 4.13.0-29.32 ]

  * linux: 4.13.0-29.32 -proposed tracker (LP: #1742722)
  * CVE-2017-5754
    - Revert "x86/cpu: Implement CPU vulnerabilites sysfs functions"
    - Revert "sysfs/cpu: Fix typos in vulnerability documentatio...