Hi, I am on ubuntu 16.04. playing audio over sco link from android device to ubuntu. PC as headset. Everything works as expected.I can hear the audio through PC speakers. Unfortunately i get below error sometimes and not able to hear the audio. Not sure why and when i get this error. couldnot confirm the reproduction path. Anyone ahs seen this issue and solved this ? Any help much appreciated. I am using inbuilt bluetooth device. A realtek one. Device Info- root@coex:# hciconfig -a hci0: Type: BR or EDR Bus: USB BD Address: DC:85:DE:FF:D9:D4 ACL MTU: 820:8 SCO MTU: 255:16 UP RUNNING PSCAN ISCAN RX bytes:12668 acl:61 sco:152 events:147 errors:0 TX bytes:7558 acl:48 sco:154 commands:85 errors:0 Features: 0xff 0xff 0xff 0xfe 0xdb 0xff 0x7b 0x87 Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 Link policy: RSWITCH HOLD SNIFF PARK Link mode: SLAVE ACCEPT Name: 'coex_brix' Class: 0x2c010c Service Classes: Rendering, Capturing, Audio Device Class: Computer, Laptop HCI Version: 4.0 (0x6) Revision: 0xe2f LMP Version: 4.0 (0x6) Subversion: 0xa041 Manufacturer: Realtek Semiconductor Corporation (93) error logs- ... good logs until ofono creates AG, and successful connection started audio play in android device , some sco connection whitenoise started, just before the real audio i get this error ... Nov 28 18:51:56 coex kernel: [10831.352267] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 3 ep 5 with no TDs queued? Nov 28 18:51:56 coex kernel: [10831.353261] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 3 ep 5 with no TDs queued? Nov 28 18:51:56 coex kernel: [10831.354269] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 3 ep 5 with no TDs queued? Nov 28 18:51:56 coex kernel: [10831.355270] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 5 comp_code 1 Nov 28 18:51:56 coex kernel: [10831.355273] xhci_hcd 0000:00:14.0: Looking for event-dma 000000002acfd0e0 trb-start 000000002acfd060 trb-end 000000002acfd060 seg-start 000000002acfd000 seg-end 000000002acfdff0 Nov 28 18:51:56 coex kernel: [10831.356269] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA Thanks Rilwan -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html