** Description changed:
+ 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
** Changed in: linux-firmware (Ubuntu Bionic)
Status: In Progress => Fix Committed
** Changed in: linux-firmware (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1829737
Title:
Bluetooth: hci0: request failed to create LE connection: status 0x0c
(Intel 9462/9560)
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