Bluetooth: hci0: request failed to create LE connection: status 0x0c (Intel 9462/9560)

[You-Sheng Yang]

SRU Justification

[Impact]
The firmware blob for Intel Bluetooth 9560/9462 is versioned 20.30.0.1 is not compatible with kernel version >= 4.19 and will cause failure to pair BT 4.0 devices.

[Fix]
29a536a02cad linux-firmware: Update firmware file for Intel Bluetooth 9560

Above upstream change contains latest firmware file for Intel Bluetooth 9560 that fixes HID pairing in recent kernel versions.

[Test Case]
Copy ibt-17-16-1.sfi blob to /lib/firmware/intel and do a cold boot to reload firmware. One should find following message in dmesg:

  Bluetooth: hci0: Bootloader revision 0.1 build 42 week 52 2015

This indicates firmware reload has been activated. For further warm boots, kernel would dump updated revision:

  Bluetooth: hci0: Firmware revision 0.1 build 184 week 15 2019

And perform BT 4.0 device pairing for functional tests.

Tested blob against following kernel versions:

* 5.0.0-1004-oem-osp1
* 5.0.0-15-generic
* 4.18.0-20-generic
* 4.15.0-1038-oem
* 4.15.0-50-generic

[Regression Risk]
Low. This affects only Intel JeffersonPeak Bluetooth chip series, namely 9461/9462/9560, which are the hardware variants to be fixed.

---

For kernel version >= 4.19, it fails to pair with BT4.0 HID devices and leave error messages in syslog:

  Bluetooth: hci0: request failed to create LE connection: status 0x0c

Which can be detailed by btmon:

  < HCI Command: LE Extended Create Connection (0x08|0x0043) plen 26 #800 [hci0] 30.895622
        Filter policy: White list is not used (0x00)
        Own address type: Public (0x00)
        Peer address type: Random (0x01)
        Peer address: DB:DD:51:2D:1C:CC (Static)
        Initiating PHYs: 0x01
        Entry 0: LE 1M
          Scan interval: 60.000 msec (0x0060)
          Scan window: 60.000 msec (0x0060)
          Min connection interval: 30.00 msec (0x0018)
          Max connection interval: 50.00 msec (0x0028)
          Connection latency: 0 (0x0000)
          Supervision timeout: 420 msec (0x002a)
          Min connection length: 0.000 msec (0x0000)
          Max connection length: 0.000 msec (0x0000)
  > HCI Event: Command Status (0x0f) plen 4 #801 [hci0] 30.896453
      LE Extended Create Connection (0x08|0x0043) ncmd 1
        Status: Command Disallowed (0x0c)

Indicating this is actually a firmware problem.

Verified this has been fixed at least in upstream linux-firmware commit 29a536a02cadb75b84c6c0b5d7af22d34d278563, firmware release version 21.10.0.6. With that firmware blob placed under /lib/firmware/intel and a cold boot, dmesg gives updated revision and device pairing works as expected:

  Firmware revision 0.1 build 184 week 15 2019

[You-Sheng Yang (vicamo)]

Affected linux-firmware package series:
* Trusty: N/A
* Xenial: REL0186
  * 4.4.0-1480generic (not supported)
  * 4.15.0-50-generic (not affected)
* Bionic: REL0201 20.30.0.1
  * 4.15.0-1038-oem (not affected)
  * 4.15.0-50-generic (not affected)
  * 4.18.0-20-generic (not affected)
  * 5.0.0-1004-oem-osp1 (affected)
* Cosmic: REL0329 20.70.0.4
  * 4.15.0-50-generic (not affected)
  * 4.18.0-20-generic (not affected)
* Disco: REL0420 21.0.0.4
  * 4.15.0-1038-oem (not affected)
  * 5.0.0.0-15-generic (not affected)
* Eoan: REL0420 21.0.0.4
  * 4.15.0-1038-oem (not affected)
  * 5.0.0.0-15-generic (not affected)

Only Bionic with 5.0.0-1004-oem-osp1 is affected.

[You-Sheng Yang (vicamo)]

https://lists.ubuntu.com/archives/kernel-team/2019-May/100802.html

[Timo Aaltonen (tjaalton)]

Hello You-Sheng, or anyone else affected,

Accepted linux-firmware into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/linux-firmware/1.173.7 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Timo Aaltonen (tjaalton)]

Hello You-Sheng, or anyone else affected,

Accepted linux-firmware into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/linux-firmware/1.173.8 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Adam Conrad (adconrad)]

The verification of the Stable Release Update for linux-firmware has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-firmware - 1.173.8

---------------
linux-firmware (1.173.8) bionic; urgency=medium

  * add firmware and topology file for sound sof driver [cml/cnl]
    (LP: #1833405)
    - SAUCE: add firmware and topology for cml/cnl sof driver

  * Intel WiFi (CNVi) module has no function on Comet Lake [8086:02f0]
    (LP: #1833065)
    - iwlwifi: add new firmwares for integrated 22000 series

linux-firmware (1.173.7) bionic; urgency=medium

  * Add Intel CyclonePeak wifi firmware (LP: #1828133)
    - iwlwifi: add firmware for 22260 and update 9000 series -46 firmwares
    - iwlwifi: update -46 firmwares for 22260 and 9000 series

  * Bluetooth: hci0: request failed to create LE connection: status 0x0c
    (LP: #1829737)
    - linux-firmware: Update firmware file for Intel Bluetooth 9560

  * Add firmware for RTL8822BE and RTL8822CE (LP: #1831833)
    - rtw88: Add firmware file for driver rtw88
    - rtw88: RTL8822C: update rtw8822c_fw.bin to v5.0

 -- Seth Forshee <email address hidden> Mon, 24 Jun 2019 15:56:43 -0500

[Warren Baird (wjbaird)]

I believe I'm impacted by this same issue. I have an ASUS ZenBook 14 - UX433FA - which based on this - https://www.notebookcheck.net/ASUS-ZenBook-14-UX433FA-Core-i5-8265U-SSD-FHD-Laptop-Review.403541.0.html - I believe has an Intel 9560 chipset (I am not sure how to independently verify this).
With kernels older than 4.20 I can successfully pair my bluetooth mouse (Logitech MX Master) - but with newer kernels I get "Bluetooth: hci0: request failed to create LE connection: status 0x0c" messages.

I'm running Linux Mint 19.1

I tried installing linux-firmware 1.173.8, and it didn't seem to help - I also downloaded 1.173.9 proposed from here: https://launchpad.net/ubuntu/bionic/amd64/linux-firmware/1.173.9 and that also didn't seem to help.

Both after a cold reboot and a warm reboot I see
[ 14.724438] Bluetooth: hci0: Firmware revision 0.1 build 201 week 49 2017

in my dmesg output.

If it's better to open a new bug to track this, let me know...

[Seth Forshee (sforshee)]

@Warren - If you still experience the issue with linux-firmware 1.173.8 then it must not be exactly the same issue, so please open a new bug.

[Warren Baird (wjbaird)]

Will do - thanks...