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

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Date:	Wed, 12 Dec 2007 19:23:47 +0100
From:	Soeren Sonnenburg <kernel@....de>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Oliver Neukum <oliver@...kum.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.24-rc4: bluetooth device gone after suspend to ram

On Wed, 2007-12-12 at 17:08 +0100, Marcel Holtmann wrote:
> 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.

No it was always like this.

> 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.

indeed after calling hid2hci the device is visible again via 
hciconfig -a

Thanks!!!
Soeren
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