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  1. BTW this is the btmon log of auto-reconnecting for Lenovo XT99:
  2.  
  3. https://pastebin.ubuntu.com/p/4rrqYmYRW7/ or see attached files
  4. XT99-autoreconn.txt
  5.  
  6. Bluetooth monitor ver 5.64
  7. = Note: Linux version 6.7.0-060700rc8-generic (x86_64) 0.263499
  8. = Note: Bluetooth subsystem version 2.22 0.263501
  9. = New Index: E0:D4:64:77:A4:7E (Primary,USB,hci0) [hci0] 0.263504
  10. = Open Index: E0:D4:64:77:A4:7E [hci0] 0.263506
  11. = Index Info: E0:D4:64:77:A4:7E (Intel Corp.) [hci0] 0.263508
  12. @ MGMT Open: bluetoothd (privileged) version 1.22 {0x0001} 0.263510
  13. > HCI Event: Connect Request (0x04) plen 10 #1 [hci0] 9.658878
  14. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  15. Class: 0x240404
  16. Major class: Audio/Video (headset, speaker, stereo, video, vcr)
  17. Minor class: Wearable Headset Device
  18. Rendering (Printing, Speaker)
  19. Audio (Speaker, Microphone, Headset)
  20. Link type: ACL (0x01)
  21. < HCI Command: Accept Connection Request (0x01|0x0009) plen 7 #2 [hci0] 9.659005
  22. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  23. Role: Central (0x00)
  24. > HCI Event: Command Status (0x0f) plen 4 #3 [hci0] 9.661887
  25. Accept Connection Request (0x01|0x0009) ncmd 1
  26. Status: Success (0x00)
  27. > HCI Event: Role Change (0x12) plen 8 #4 [hci0] 9.778614
  28. Status: Success (0x00)
  29. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  30. Role: Central (0x00)
  31. > HCI Event: Link Key Request (0x17) plen 6 #5 [hci0] 9.794602
  32. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  33. < HCI Command: Link Key Request Reply (0x01|0x000b) plen 22 #6 [hci0] 9.794922
  34. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  35. Link key: d74e802fd350322c75f85eb0f030c10d
  36. > HCI Event: Command Complete (0x0e) plen 10 #7 [hci0] 9.797571
  37. Link Key Request Reply (0x01|0x000b) ncmd 1
  38. Status: Success (0x00)
  39. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  40. > HCI Event: Vendor (0xff) plen 4 #8 [hci0] 9.833807
  41. 26 00 01 01 &...
  42. > HCI Event: Connect Complete (0x03) plen 11 #9 [hci0] 9.836558
  43. Status: Success (0x00)
  44. Handle: 256
  45. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  46. Link type: ACL (0x01)
  47. Encryption: Enabled (0x01)
  48. < HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2 #10 [hci0] 9.836815
  49. Handle: 256
  50. > HCI Event: Command Status (0x0f) plen 4 #11 [hci0] 9.839519
  51. Read Remote Supported Features (0x01|0x001b) ncmd 1
  52. Status: Success (0x00)
  53. < HCI Command: Write Scan Enable (0x03|0x001a) plen 1 #12 [hci0] 9.839553
  54. Scan enable: No Scans (0x00)
  55. > HCI Event: Command Complete (0x0e) plen 4 #13 [hci0] 9.842519
  56. Write Scan Enable (0x03|0x001a) ncmd 2
  57. Status: Success (0x00)
  58. > HCI Event: Read Remote Supported Features (0x0b) plen 11 #14 [hci0] 9.873529
  59. Status: Success (0x00)
  60. Handle: 256
  61. Features: 0xbf 0xfe 0x8d 0xfa 0xd8 0x3d 0x79 0x83
  62. 3 slot packets
  63. 5 slot packets
  64. Encryption
  65. Slot offset
  66. Timing accuracy
  67. Role switch
  68. Sniff mode
  69. Power control requests
  70. Channel quality driven data rate (CQDDR)
  71. SCO link
  72. HV2 packets
  73. HV3 packets
  74. u-law log synchronous data
  75. A-law log synchronous data
  76. CVSD synchronous data
  77. Power control
  78. Transparent synchronous data
  79. Broadcast Encryption
  80. Enhanced Data Rate ACL 2 Mbps mode
  81. Enhanced inquiry scan
  82. Interlaced inquiry scan
  83. Interlaced page scan
  84. RSSI with inquiry results
  85. Extended SCO link (EV3 packets)
  86. AFH capable peripheral
  87. AFH classification peripheral
  88. LE Supported (Controller)
  89. 3-slot Enhanced Data Rate ACL packets
  90. 5-slot Enhanced Data Rate ACL packets
  91. Pause encryption
  92. AFH capable central
  93. AFH classification central
  94. Enhanced Data Rate eSCO 2 Mbps mode
  95. Extended Inquiry Response
  96. Secure Simple Pairing
  97. Encapsulated PDU
  98. Erroneous Data Reporting
  99. Non-flushable Packet Boundary Flag
  100. Link Supervision Timeout Changed Event
  101. Inquiry TX Power Level
  102. Extended features
  103. < HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3 #15 [hci0] 9.873671
  104. Handle: 256
  105. Page: 1
  106. > HCI Event: Command Status (0x0f) plen 4 #16 [hci0] 9.876553
  107. Read Remote Extended Features (0x01|0x001c) ncmd 1
  108. Status: Success (0x00)
  109. > HCI Event: Read Remote Extended Features (0x23) plen 13 #17 [hci0] 9.881657
  110. Status: Success (0x00)
  111. Handle: 256
  112. Page: 1/2
  113. Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
  114. Secure Simple Pairing (Host Support)
  115. < HCI Command: Remote Name Request (0x01|0x0019) plen 10 #18 [hci0] 9.881812
  116. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  117. Page scan repetition mode: R2 (0x02)
  118. Page scan mode: Mandatory (0x00)
  119. Clock offset: 0x0000
  120. < ACL Data TX: Handle 256 flags 0x00 dlen 10 #19 [hci0] 9.881832
  121. L2CAP: Information Request (0x0a) ident 1 len 2
  122. Type: Extended features supported (0x0002)
  123. > ACL Data RX: Handle 256 flags 0x02 dlen 10 #20 [hci0] 9.882722
  124. L2CAP: Information Request (0x0a) ident 1 len 2
  125. Type: Extended features supported (0x0002)
  126. < ACL Data TX: Handle 256 flags 0x00 dlen 16 #21 [hci0] 9.882812
  127. L2CAP: Information Response (0x0b) ident 1 len 8
  128. Type: Extended features supported (0x0002)
  129. Result: Success (0x0000)
  130. Features: 0x000002b8
  131. Enhanced Retransmission Mode
  132. Streaming Mode
  133. FCS Option
  134. Fixed Channels
  135. Unicast Connectionless Data Reception
  136. > HCI Event: Command Status (0x0f) plen 4 #22 [hci0] 9.884497
  137. Remote Name Request (0x01|0x0019) ncmd 1
  138. Status: Success (0x00)
  139. > HCI Event: Number of Completed Packets (0x13) plen 5 #23 [hci0] 9.886489
  140. Num handles: 1
  141. Handle: 256
  142. Count: 1
  143. > HCI Event: Number of Completed Packets (0x13) plen 5 #24 [hci0] 9.888489
  144. Num handles: 1
  145. Handle: 256
  146. Count: 1
  147. > ACL Data RX: Handle 256 flags 0x02 dlen 16 #25 [hci0] 9.895127
  148. L2CAP: Information Response (0x0b) ident 1 len 8
  149. Type: Extended features supported (0x0002)
  150. Result: Success (0x0000)
  151. Features: 0x00000000
  152. > ACL Data RX: Handle 256 flags 0x02 dlen 12 #26 [hci0] 9.895137
  153. L2CAP: Connection Request (0x02) ident 1 len 4
  154. PSM: 1 (0x0001)
  155. Source CID: 64
  156. @ MGMT Event: Device Connected (0x000b) plen 18 {0x0001} [hci0] 9.895235
  157. BR/EDR Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  158. Flags: 0x00000000
  159. Data length: 5
  160. Class: 0x240404
  161. Major class: Audio/Video (headset, speaker, stereo, video, vcr)
  162. Minor class: Wearable Headset Device
  163. Rendering (Printing, Speaker)
  164. Audio (Speaker, Microphone, Headset)
  165. < ACL Data TX: Handle 256 flags 0x00 dlen 16 #27 [hci0] 9.895303
  166. L2CAP: Connection Response (0x03) ident 1 len 8
  167. Destination CID: 64
  168. Source CID: 64
  169. Result: Connection successful (0x0000)
  170. Status: No further information available (0x0000)
  171. < ACL Data TX: Handle 256 flags 0x00 dlen 12 #28 [hci0] 9.895326
  172. L2CAP: Configure Request (0x04) ident 2 len 4
  173. Destination CID: 64
  174. Flags: 0x0000
  175. > HCI Event: Remote Name Req Complete (0x07) plen 255 #29 [hci0] 9.903463
  176. Status: Success (0x00)
  177. Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA)
  178. Name: 联想 thinkplus XT99
  179. > HCI Event: Number of Completed Packets (0x13) plen 5 #30 [hci0] 9.905494
  180. Num handles: 1
  181. Handle: 256
  182. Count: 1
  183. > ACL Data RX: Handle 256 flags 0x02 dlen 16 #31 [hci0] 9.906703
  184. L2CAP: Configure Request (0x04) ident 2 len 8
  185. Destination CID: 64
  186. Flags: 0x0000
  187. Option: Maximum Transmission Unit (0x01) [mandatory]
  188. MTU: 672
  189. > ACL Data RX: Handle 256 flags 0x02 dlen 14 #32 [hci0] 9.906707
  190. L2CAP: Configure Response (0x05) ident 2 len 6
  191. Source CID: 64
  192. Flags: 0x0000
  193. Result: Success (0x0000)
  194. < ACL Data TX: Handle 256 flags 0x00 dlen 18 #33 [hci0] 9.906747
  195. L2CAP: Configure Response (0x05) ident 2 len 10
  196. Source CID: 64
  197. Flags: 0x0000
  198. Result: Success (0x0000)
  199. Option: Maximum Transmission Unit (0x01) [mandatory]
  200. MTU: 672
  201. > HCI Event: Number of Completed Packets (0x13) plen 5 #34 [hci0] 9.907480
  202. Num handles: 1
  203. Handle: 256
  204. Count: 1
  205. > HCI Event: Number of Completed Packets (0x13) plen 5 #35 [hci0] 9.931753
  206. Num handles: 1
  207. Handle: 256
  208. Count: 1
  209. > ACL Data RX: Handle 256 flags 0x02 dlen 24 #36 [hci0] 9.938709
  210. Channel: 64 len 20 [PSM 1 mode Basic (0x00)] {chan 0}
  211. SDP: Service Search Attribute Request (0x06) tid 1 len 15
  212. Search pattern: [len 6]
  213. Sequence (6) with 3 bytes [16 extra bits] len 6
  214. UUID (3) with 2 bytes [0 extra bits] len 3
  215. Handsfree Audio Gateway (0x111f)
  216. Max record count: 512
  217. Attribute list: [len 6]
  218. Sequence (6) with 3 bytes [16 extra bits] len 6
  219. Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
  220. 0x0004
  221. Continuation state: 0
  222. < ACL Data TX: Handle 256 flags 0x00 dlen 33 #37 [hci0] 9.939203
  223. Channel: 64 len 29 [PSM 1 mode Basic (0x00)] {chan 0}
  224. SDP: Service Search Attribute Response (0x07) tid 1 len 24
  225. Attribute bytes: 21
  226. Attribute list: [len 17] {position 0}
  227. Attribute: Protocol Descriptor List (0x0004) [len 2]
  228. Sequence (6) with 3 bytes [8 extra bits] len 5
  229. UUID (3) with 2 bytes [0 extra bits] len 3
  230. L2CAP (0x0100)
  231. Sequence (6) with 5 bytes [8 extra bits] len 7
  232. UUID (3) with 2 bytes [0 extra bits] len 3
  233. RFCOMM (0x0003)
  234. Unsigned Integer (1) with 1 byte [0 extra bits] len 2
  235. 0x0d
  236. Continuation state: 0
  237. > HCI Event: Number of Completed Packets (0x13) plen 5 #38 [hci0] 9.944501
  238. Num handles: 1
  239. Handle: 256
  240. Count: 1
  241. > ACL Data RX: Handle 256 flags 0x02 dlen 10 #39 [hci0] 9.954948
  242. L2CAP: Information Request (0x0a) ident 3 len 2
  243. Type: Extended features supported (0x0002)
  244. < ACL Data TX: Handle 256 flags 0x00 dlen 16 #40 [hci0] 9.955074
  245. L2CAP: Information Response (0x0b) ident 3 len 8
  246. Type: Extended features supported (0x0002)
  247. Result: Success (0x0000)
  248. Features: 0x000002b8
  249. Enhanced Retransmission Mode
  250. Streaming Mode
  251. FCS Option
  252. Fixed Channels
  253. Unicast Connectionless Data Reception
  254. > HCI Event: Number of Completed Packets (0x13) plen 5 #41 [hci0] 9.959686
  255. Num handles: 1
  256. Handle: 256
  257. Count: 1
  258. > ACL Data RX: Handle 256 flags 0x02 dlen 12 #42 [hci0] 9.966996
  259. L2CAP: Connection Request (0x02) ident 3 len 4
  260. PSM: 3 (0x0003)
  261. Source CID: 65
  262. < ACL Data TX: Handle 256 flags 0x00 dlen 16 #43 [hci0] 9.967144
  263. L2CAP: Connection Response (0x03) ident 3 len 8
  264. Destination CID: 0
  265. Source CID: 65
  266. Result: Connection refused - security block (0x0003)
  267. Status: No further information available (0x0000)
  268. > HCI Event: Number of Completed Packets (0x13) plen 5 #44 [hci0] 9.991660
  269. Num handles: 1
  270. Handle: 256
  271. Count: 1
  272.  
  273.  
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