Hi Champion, I have a card here which has RTL8723BE wifi and bluetooth combined. 2 antennas. In linux-next (Linux 4.2) the bluetooth and wifi work fine separately, but when using them together, I can sometimes see a problem. This is using the btusb driver based on your code (now included in Linux 4.2), and the RTL8723B rtlwifi driver, all using the latest firmware in the linux-firmware git repo. To reproduce: - Boot with no wifi connection active - "hcitool scan" and verify that my laptop and phone can be seen - Connect to wifi - Run "hcitool scan" again a few times a minute, within 2-5 minutes normally my phone and laptop can no longer be seen - Disconnect from wifi and immediately run "hcitool scan" again, my phone and laptop can be seen 3 interesting observations when the scan results are coming back empty: 1. I can still get the names of the remote devices by running "hcitool name <addr>" 2. I can still query the remote devices by running "hcitool info <addr>". After this, the scan suddenly starts working again! 3. Even though both of my local bluetooth devices no longer appear in scan results, I can sometimes see my neighbour's phone coming up as a scan result at this time. Anyway, disabling btcoexist avoids the issue, so I dug through that code, and found the exact line of code that seems to (sometimes) make us enter this strange mode. Call chain inside drivers/net/wireless/rtlwifi/btcoexist/halbtc8723b2ant.c: ex_btc8723b2ant_bt_info_notify (called when starting and finishing a BT scan) btc8723b2ant_run_coexist_mechanism btc8723b2ant_action_bt_inquiry As wifi is connected, we now call: btc8723b2ant_ps_tdma(btcoexist, NORMAL_EXEC, true, 3); This is the function call that sometimes puts us into the mode where there are no scan results. Inside this function, if I comment out these lines in the turn_on section, the bug is avoided: case 3: //btc8723b2ant_set_fw_ps_tdma(btcoexist, 0xe3, 0x1c, // 0x3, 0xf1, 0x90); break; Any idea what is happening here? Can you help me find a better fix? Thanks Daniel -- 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