linux-kernel - Re: 2.6.24-rc4: bluetooth device gone after suspend to ram

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Date:	Wed, 12 Dec 2007 17:08:47 +0100
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Soeren Sonnenburg <kernel@....de>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.24-rc4: bluetooth device gone after suspend to ram

Hi Oliver,

> > I noticed that on my macbook pro1,1 the bluetooth device is gone after
> > suspend to ram, i.e.
> 
> Is this a regression?
> Does it work if you unload hci_usb before you suspend?
> If so, please recompile with CONFIG_USB_DEBUG and provide
> dmesg.

sometimes ACPI is involved and will killswitch the Bluetooth device on
suspend. Sometimes the distros to a manual killswitch. And in case of
Bluetooth a killswitch means physically removing the power from the
device.

In case of a MacBook it can happen that this device goes back into HID
mode and thus you need to call hid2hci.

Regards

Marcel


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