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IDProjectCategoryView StatusDate SubmittedLast Update
0001674T99X171.00 SKB EagleSW Issuepublic2023-03-06 09:142023-04-10 17:33
Reporter(ALTech) Younkwang Jung Assigned To(ALTech) Younkwang Jung Due Date2023-03-08 10:11
PriorityhighSeveritys4-minorReproducibilityhave not tried
Status closedResolutionnot fixable 
Summary0001674: [Smart3][VoC] RCU BT issue ( connected and disconnected again )
DescriptionHi Kerwin

The following VoC has been reported.
https://jira.skbroadband.com/browse/BTVD-21881

FW version : 15.534.28-20220818

issue : keep in disconnect state, then tries to connect but remains in disconnect state again

- When I filter the dmesg.txt , it looks like below.
===========================================================================
..
[Fri Mar 3 15:35:52 2023] input: BMM_BA02_20D as /devices/virtual/misc/uhid/0005:005D:0002.0056/input/input90
[Fri Mar 3 15:35:52 2023] skbrm 0005:005D:0002.0056: input,hidraw0: BLUETOOTH HID v0.00 Keyboard [BMM_BA02_20D] on
[Fri Mar 3 15:35:52 2023] atvr_probe: remotes count 0->1
[Fri Mar 3 15:35:53 2023] --> skbrm_raw_event: id=0x80, size=4, data= 80 00 3a 00
[Fri Mar 3 15:35:53 2023] --> skbrm_raw_event: id=0x80, size=4, data= 80 00 ff ff
[Fri Mar 3 15:46:30 2023] atvr_remove: hdev->name = BMM_BA02_20D removed, num 1->0
[Fri Mar 3 15:46:30 2023] atvr_probe:1998
[Fri Mar 3 15:46:30 2023] atvr_probe: name = BMM_BA02_20D, vendor_id = 93, product_id = 2, num 0
[Fri Mar 3 15:46:30 2023] atvr_probe: Found target remote BMM_BA02_20D
[Fri Mar 3 15:46:30 2023] skbrm 0005:005D:0002.0057: unknown main item tag 0x0
[Fri Mar 3 15:46:30 2023] skbrm_input_configured
[Fri Mar 3 15:46:30 2023] atvr_input_configured:2208
[Fri Mar 3 15:46:30 2023] input: BMM_BA02_20D as /devices/virtual/misc/uhid/0005:005D:0002.0057/input/input91
[Fri Mar 3 15:46:30 2023] skbrm 0005:005D:0002.0057: input,hidraw0: BLUETOOTH HID v0.00 Keyboard [BMM_BA02_20D] on
[Fri Mar 3 15:46:30 2023] atvr_probe: remotes count 0->1
[Fri Mar 3 15:46:30 2023] --> skbrm_raw_event: id=0x80, size=4, data= 80 00 3a 00
[Fri Mar 3 15:46:30 2023] --> skbrm_raw_event: id=0x80, size=4, data= 80 00 ff ff
[Fri Mar 3 15:46:43 2023] atvr_remove: hdev->name = BMM_BA02_20D removed, num 1->0
[Fri Mar 3 15:46:43 2023] atvr_probe:1998
[Fri Mar 3 15:46:43 2023] atvr_probe: name = BMM_BA02_20D, vendor_id = 93, product_id = 2, num 0
[Fri Mar 3 15:46:43 2023] atvr_probe: Found target remote BMM_BA02_20D
[Fri Mar 3 15:46:43 2023] skbrm 0005:005D:0002.0058: unknown main item tag 0x0
[Fri Mar 3 15:46:43 2023] skbrm_input_configured
[Fri Mar 3 15:46:43 2023] atvr_input_configured:2208
[Fri Mar 3 15:46:43 2023] input: BMM_BA02_20D as /devices/virtual/misc/uhid/0005:005D:0002.0058/input/input92
[Fri Mar 3 15:46:43 2023] skbrm 0005:005D:0002.0058: input,hidraw0: BLUETOOTH HID v0.00 Keyboard [BMM_BA02_20D] on
[Fri Mar 3 15:46:43 2023] atvr_probe: remotes count 0->1
[Fri Mar 3 15:46:44 2023] --> skbrm_raw_event: id=0x80, size=4, data= 80 00 3a 00
[Fri Mar 3 15:46:44 2023] --> skbrm_raw_event: id=0x80, size=4, data= 80 00 ff ff
[Fri Mar 3 15:46:57 2023] atvr_remove: hdev->name = BMM_BA02_20D removed, num 1->0
...
==============================================================

Please analyze the log.

Thank you
YK.Jung
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Users monitoring this issue

User List (ALTech) JunGyu Kim , (ALTech) SY Yoon

Activities

(ALTech) Younkwang Jung

2023-03-06 09:14

developer  

_20230303_28_cd_c4_fc_59_23.zip (2,608,653 bytes)

(ALTech) Younkwang Jung

2023-03-06 09:33

developer   ~0012433

Hi Kerwin

https://jira.skbroadband.com/browse/BPM-15718
Of the 86 STBs installed in a particular randomly group(hospital), 13 STBs are BT-paired but are viewed with BT disconnected.
Currently, SKB wants to check why BT is entering the disconnected state.

please analyze the log above

Thank you
YK.Jung
image.png (127,642 bytes)   
image.png (127,642 bytes)   

(SW) Kerwin Chen

2023-03-06 17:31

developer   ~0012441

Hi YK,

What we know from logcat is the reason of disconnection.
"0x0008" means timeout.
But we can't know who (STB or RCU) sends this event from logcat.
Usually, it needs a Bluetooth sniffer device to capture air packets.

================ main.log.2 =============================
...
03-03 15:31:44.825 3952 4450 W bt_stack: [WARNING:bta_gattc_act.cc(1044)] bta_gattc_conn_cback: cif=3 connected=0 conn_id=0x0003 reason=0x0008
03-03 15:31:44.826 3952 4450 W bt_stack: [WARNING:bta_gattc_act.cc(1044)] bta_gattc_conn_cback: cif=4 connected=0 conn_id=0x0004 reason=0x0008
03-03 15:31:44.827 3952 4450 W bt_stack: [WARNING:bta_gattc_act.cc(1044)] bta_gattc_conn_cback: cif=6 connected=0 conn_id=0x0006 reason=0x0008
03-03 15:31:44.828 3952 4450 W bt_stack: [WARNING:bta_gattc_act.cc(1044)] bta_gattc_conn_cback: cif=7 connected=0 conn_id=0x0007 reason=0x0008
03-03 15:31:44.829 3952 4450 I bt_btm_sec: btm_sec_disconnected clearing pending flag handle:64 reason:8
....

(ALTech) Younkwang Jung

2023-03-08 09:04

developer   ~0012457

Hi Kerwin

Unable to capture air packets from end users.
If you can add a log that can analyze the cause to bt stack, please add it.

Thank you
YK.Jung

(ALTech) Younkwang Jung

2023-04-10 17:33

developer   ~0012781

Hi Kerwin

The RCU engineer went to the issue place and measured it, and it was caused by BT signal interference.
So this issue has been closed because the cause is an environmental issue.

I will close this issue

Thank you for your support
YK.Jung

Issue History

Date Modified Username Field Change
2023-03-06 09:14 (ALTech) Younkwang Jung New Issue
2023-03-06 09:14 (ALTech) Younkwang Jung Status new => assigned
2023-03-06 09:14 (ALTech) Younkwang Jung Assigned To => (SW) Kerwin Chen
2023-03-06 09:14 (ALTech) Younkwang Jung File Added: _20230303_28_cd_c4_fc_59_23.zip
2023-03-06 09:15 (ALTech) Younkwang Jung Issue Monitored: (ALTech) SY Yoon
2023-03-06 09:15 (ALTech) Younkwang Jung Issue Monitored: (ALTech) JunGyu Kim
2023-03-06 09:33 (ALTech) Younkwang Jung Note Added: 0012433
2023-03-06 09:33 (ALTech) Younkwang Jung File Added: image.png
2023-03-06 09:33 (ALTech) Younkwang Jung Priority normal => high
2023-03-06 17:31 (SW) Kerwin Chen Note Added: 0012441
2023-03-06 17:32 (SW) Kerwin Chen Assigned To (SW) Kerwin Chen => (ALTech) Younkwang Jung
2023-03-06 17:32 (SW) Kerwin Chen Status assigned => acknowledged
2023-03-08 09:04 (ALTech) Younkwang Jung Note Added: 0012457
2023-04-10 17:33 (ALTech) Younkwang Jung Note Added: 0012781
2023-04-10 17:33 (ALTech) Younkwang Jung Status acknowledged => closed
2023-04-10 17:33 (ALTech) Younkwang Jung Resolution open => not fixable