On Thu, 2013-11-14 at 08:28 +0900, Marcel Holtmann wrote:
> Hi Bastien,
>
> > After suspending and resuming my laptop, hci0's name is reset to what
> > looks like the factory name:
> > $ hciconfig -a | grep Name
> > Name: 'BCM20702A'
> >
> > This is the device in question:
> > Bus 001 Device 004: ID 0a5c:21e6 Broadcom Corp. BCM20702 Bluetooth 4.0 [ThinkPad]
> >
> > And my laptop is a Lenovo X1 Carbon.
> >
> > Neither udevadm nor btmon show the device going away on suspend and
> > coming back on resume.
>
> can you start btmon, call hciconfig hci0 name, then suspend, then
> resume, call hciconfig hci0 name again.
Bluetooth monitor ver 5.10
= New Index: F4:B7:E2:E8:99:E2 (BR/EDR,USB,hci0) [hci0] 0.176335
< HCI Command: Read Local Name (0x03|0x0014) plen 0 [hci0] 9.797930
> HCI Event: Command Complete (0x0e) plen 252 [hci0] 9.813834
Read Local Name (0x03|0x0014) ncmd 1
Status: Success (0x00)
Name: nuvo
< HCI Command: Read Local Name (0x03|0x0014) plen 0 [hci0] 33.109166
> HCI Event: Command Complete (0x0e) plen 252 [hci0] 33.125157
Read Local Name (0x03|0x0014) ncmd 1
Status: Success (0x00)
Name: BCM20702A
> I am wondering if for some reason the suspend/resume actually does a
> HCI Reset without telling us. The name normally only gets reset to
> BCM20702A when doing a full reset.
Looks like that's what it's doing.
> Another possibility is that we actually forgot to set it in the first
> place. I am pretty sure I have intensively tested and that should not
> happen, but you might just found a corner case.
It's set on a normal boot, it seems to be reset only when suspending.
Cheers
--
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
