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[Bug 1465178] Re: Microcode SW error detected. Restarting 0x2000000 on connecting to AC network with iwlwifi-7265-ucode-


Thanks Christopher - that was a good idea.

After applying the latest BIOS:

fifieldt@nomad115:~$  sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
[sudo] password for fifieldt: 
N10ET38W (1.17 )

the microcode error disappears.

However, connections to  802.11AC networks are still not possible, with the error:

"capabilities/regulatory prevented using AP HT/VHT configuration,

Dec 28 13:36:30 nomad115 kernel: [ 1399.324904] wlan0: capabilities/regulatory prevented using AP HT/VHT configuration, downgraded
Dec 28 13:36:30 nomad115 wpa_supplicant[996]: wlan0: Trying to associate with 30:b5:c2:84:95:0b (SSID='chocolateblock5' freq=5765 MHz)
Dec 28 13:36:30 nomad115 NetworkManager[857]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Dec 28 13:36:30 nomad115 kernel: [ 1399.330730] wlan0: send auth to 30:b5:c2:84:95:0b (try 1/3)
Dec 28 13:36:30 nomad115 kernel: [ 1399.331525] wlan0: authenticated
Dec 28 13:36:30 nomad115 kernel: [ 1399.332430] wlan0: associate with 30:b5:c2:84:95:0b (try 1/3)
Dec 28 13:36:30 nomad115 kernel: [ 1399.333555] wlan0: RX AssocResp from 30:b5:c2:84:95:0b (capab=0x11 status=104 aid=0)
Dec 28 13:36:30 nomad115 kernel: [ 1399.333560] wlan0: 30:b5:c2:84:95:0b denied association (code=104)

which appears to be related to this bug: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1158749

continuing discussion there.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Fix Released

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  Microcode SW error detected.  Restarting 0x2000000 on connecting to AC
  network with iwlwifi-7265-ucode-

Status in linux package in Ubuntu:
  Fix Released

Bug description:
  When trying to connect to an 802.11AC network using an Intel 7265 with
  firmware iwlwifi-7265-ucode- on kernel 3.16.0-38-generic
  #52~14.04.1-Ubuntu, the error " Microcode SW error detected.
  Restarting 0x2000000." is received, the card crashes and can't connect
  to the network.

  The same card/driver/firmware combination performs well on 2.4GHz
  networks, and also 802.11a.

  Call trace:

  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
   /dev/snd/controlC1:  fifieldt   2135 F.... pulseaudio
   /dev/snd/controlC0:  fifieldt   2135 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=a83453a5-d150-481d-b8f4-800d6290a06a
  InstallationDate: Installed on 2015-04-11 (256 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
   Bus 001 Device 003: ID 5986:0366 Acer, Inc
   Bus 001 Device 002: ID 8087:8001 Intel Corp.
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 20CMA00ETW
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-55-generic root=UUID=c31100a6-e1cc-4df6-aeb7-521edf7c6c23 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-55.74~14.04.1-generic 3.16.7-ckt19
   linux-restricted-modules-3.16.0-55-generic N/A
   linux-backports-modules-3.16.0-55-generic  N/A
   linux-firmware                             1.127.19
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  Tags:  trusty
  Uname: Linux 3.16.0-55-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 12/01/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N10ET27W (1.04 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20CMA00ETW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrN10ET27W(1.04):bd12/01/2014:svnLENOVO:pn20CMA00ETW:pvrThinkPadX250:rvnLENOVO:rn20CMA00ETW:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20CMA00ETW
  dmi.product.version: ThinkPad X250
  dmi.sys.vendor: LENOVO

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