Hi Jeremy, > I've posted more details here for userspace diagnosis/workaround, > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/377225 > > Some (older?) BT adapters don't support the commands 'Read Default Link > Policy Settings' > 'Write Default Link Policy Settings' > > as shown by # hciconfig hci0 commands > > This appears be one cause of the infamous kernel message: hci0: command > tx timeout. This in turn causes bluetoothd to give up and take down the > interface. > > If you kill bluetoothd, and manually # hciconfig hci0 up, you can > discover and inq devices no problem. > > I made a patch to disable the offending command, and the above mentioned > bug report I gave instructions to gather data on adapter BT version, > supported features, and supported commands. Hopefully some user reports > can be used to make use of the command conditional on actual adapter > support. > > The question for kernel side is, regression, or corrected behaviour? this is basically a bluetoothd issue. We should be reading the list of supported commands and then either issue or not issue this command. Feel free to write a patch for that. Regards Marcel -- 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
