Adapter name reset on suspend/resume

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.

Hi Bastien,

Quoted 8 lines

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]

Quoted 4 lines

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.

HCI Event: Command Complete (0x0e) plen 252 [hci0] 33.125157

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.

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.

Quoted 8 lines

Quoted 8 lines

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]

Quoted 7 lines

Quoted 4 lines

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

Quoted 1 line

HCI Event: Command Complete (0x0e) plen 252 [hci0] 33.125157

     Read Local Name (0x03|0x0014) ncmd 1
       Status: Success (0x00)
       Name: BCM20702A

Quoted 3 lines

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.

Quoted 3 lines

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.