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From:   John Klug <John.Klug@multitech.com>
To:     Linux-Bluetooth MailingList <linux-bluetooth@vger.kernel.org>
Subject: [BUG] Extended Scan Hangs
Thread-Topic: [BUG] Extended Scan Hangs
Thread-Index: AQHYkYPWWftWQokBQUOT5vMZZwl4BA==
Date:   Wed, 6 Jul 2022 22:23:38 +0000
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Bluez5 from master on 27 June 2022=0A=
1d6cfb8e625a944010956714c1802bc1e1fc6c4f=0A=
monitor: Fix crash when using RTT backend=0A=
=0A=
=0A=
Kernel:=0A=
5.4.199=0A=
=0A=
After turning scan on, after a short time it hangs.=A0 Here are the packets=
 to start discovery:=0A=
=0A=
< HCI Command: LE Set Exte.. (0x08|0x0042) plen 6 =A0#1777 [hci0] 11:06:02.=
731748=0A=
=A0 =A0 =A0 =A0 Extended scan: Enabled (0x01)=0A=
=A0 =A0 =A0 =A0 Filter duplicates: Enabled (0x01)=0A=
=A0 =A0 =A0 =A0 Duration: 0 msec (0x0000)=0A=
=A0 =A0 =A0 =A0 Period: 0.00 sec (0x0000)=0A=
> HCI Event: Command Complete (0x0e) plen 4 =A0 =A0 =A0 =A0#1778 [hci0] 11:=
06:02.741529=0A=
=A0 =A0 =A0 LE Set Extended Scan Enable (0x08|0x0042) ncmd 1=0A=
=A0 =A0 =A0 =A0 Status: Success (0x00)=0A=
@ MGMT Event: Command Complete (0x0001) plen 4 =A0{0x0001} [hci0] 11:06:02.=
741819=0A=
=A0 =A0 =A0 Start Discovery (0x0023) plen 1=0A=
=A0 =A0 =A0 =A0 Status: Success (0x00)=0A=
=A0 =A0 =A0 =A0 Address type: 0x06=0A=
=A0 =A0 =A0 =A0 =A0 LE Public=0A=
=A0 =A0 =A0 =A0 =A0 LE Random=0A=
@ MGMT Event: Discovering (0x0013) plen 2 =A0 =A0 =A0 {0x0001} [hci0] 11:06=
:02.741899=0A=
=A0 =A0 =A0 =A0 Address type: 0x06=0A=
=A0 =A0 =A0 =A0 =A0 LE Public=0A=
=A0 =A0 =A0 =A0 =A0 LE Random=0A=
=A0 =A0 =A0 =A0 Discovery: Enabled (0x01)=0A=
=0A=
=0A=
After a short time and 1215 devices found (0x0012), no commands may be exec=
uted:=0A=
=0A=
bluetooth]# scan off=0A=
Failed to stop discovery: org.bluez.Error.InProgress=0A=
=0A=
btmon output looks stuck.=A0 Often the output stops in the middle of an eve=
nt:=0A=
=0A=
> HCI Event: LE Meta Event (0x3e) plen 41 =A0 =A0 =A0 =A0 =A0#3484 [hci0] 1=
1:06:13.493567=0A=
=A0 =A0 =A0 LE Extended Advertising Report (0x0d)=0A=
=A0 =A0 =A0 =A0 Num reports: 1=0A=
=A0 =A0 =A0 =A0 Entry 0=0A=
=A0 =A0 =A0 =A0 =A0 Event type: 0x0010=0A=
=A0 =A0 =A0 =A0 =A0 =A0 Props: 0x0010=0A=
=A0 =A0 =A0 =A0 =A0 =A0 =A0 Use legacy advertising PDUs=0A=
=A0 =A0 =A0 =A0 =A0 =A0 Data status: ^[[0;32mComplete^[[0m=0A=
=A0 =A0 =A0 =A0 =A0 Legacy PDU Type: ADV_NONCONN_IND (0x0010)=0A=
=A0 =A0 =A0 =A0 =A0 Address type: Random (0x01)=0A=
=A0 =A0 =A0 =A0 =A0 Address: 0C:7D:02:DB:5A:57 (Non-Resolvable)=0A=
=A0 =A0 =A0 =A0 =A0 Prima=0A=
=0A=
Note that "Primary PHY" is incomplete.=0A=
=0A=
The hang during scan happens 100% of the time.=0A=
=0A=
=0A=
=0A=
John Klug=0A=
=0A=