Description of problem: Broadcom bluetooth adaptor not working with bluetooth-alsa Version-Release number of selected component (if applicable): btsco 0.42 Built from: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=200499 https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=200498 How reproducible: Always Steps to Reproduce: 1. Setup btsco 2. Try to use device Actual results: Only the microphone works. No audio is able to be sent to device. I am able to make the device ring, and use the device to adjust the volume level, etc. Expected results: Audio will make it to the device. Additional info: The suggested patch was pulled from the sourceforge site. I don't know why, so I pulled the patch from google cache: --- linux/net/bluetooth/hci_event.c 2006-01-31 07:52:07.000000000 +0100 +++ linux/net/bluetooth/hci_event.c 2006-02-13 10:46:30.000000000 +0100 @@ -320,9 +320,9 @@ } hdev->acl_mtu = __le16_to_cpu(bs->acl_mtu); - hdev->sco_mtu = bs->sco_mtu ? bs->sco_mtu : 64; + hdev->sco_mtu = (bs->sco_mtu < 64) ? 64 : bs->sco_mtu; hdev->acl_pkts = hdev->acl_cnt = __le16_to_cpu(bs->acl_max_pkt); - hdev->sco_pkts = hdev->sco_cnt = __le16_to_cpu(bs->sco_max_pkt); + hdev->sco_pkts = hdev->sco_cnt = bs->sco_max_pkt ? __le16_to_cpu(bs->sco_max_pkt) : 8; BT_DBG("%s mtu: acl %d, sco %d max_pkt: acl %d, sco %d", hdev->name, hdev->acl_mtu, hdev->sco_mtu, hdev->acl_pkts, hdev->sco_pkts);
Just to make the README more apparent: http://bluetooth-alsa.cvs.sourceforge.net/bluetooth-alsa/btsco/README?view=markup
This fix wasn't accepted upstream and never will be. Most Broadcom based adapters have a quirk to fix their SCO MTU. If this adapter is not in the list, you can use the force_scofix module parameter of the hci_usb driver to activate it.
Ok, how do I test this module parameter?
Well, using force_scofix does work. For the record: Add the following to /etc/modprobe.conf: options hci_usb force_scofix=1