Re: [Bluez-users] Can only start Bluetooth once on my Sony Picturebook

[Marcel Holtmann <marcel@holtmann.org>]

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Hi Timothy,

> A little query which does not really matter,
> but which leaves me slightly puzzled.
> 
> I'm running linux-2.6.6-rc2 under Fedora-1
> on my Sony C1VFK Picturebook.
> This has in-built Bluetooth.
> To start this running, I say "spicctrl -l1"
> (when the blue Bluetooth light on my laptop comes on)
> followed by "service bluetooth restart".
> 
> All this works perfectly.
> But if I give the command "spicctrl -l0"
> to stop the inbuilt Bluetooth
> I am never able to restart it,
> except by re-booting.
> 
> I couldn't see from a very brief (and ignorant) look at the source
> why the sonypi_ioctl() call couldn't be reversed.
> 
> Perhaps there is some command I could give
> to restart Bluetooth, short of re-booting?

you can keep every Bluetooth daemon running even if no device is
attached. They will re-init themself if you power-up your internal
Bluetooth device. What I think that happens is that the stopping with
spicctrl is the same as a physical unplug and this causes a kernel oops.
Check if you have CONFIG_BT_HCIUSB_SCO enabled, if yes, disable for now
or apply the attached patch.

Regards

Marcel


[-- Attachment #2: patch --]
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===== drivers/bluetooth/hci_usb.c 1.49 vs edited =====
--- 1.49/drivers/bluetooth/hci_usb.c	Sat Apr 17 00:23:48 2004
+++ edited/drivers/bluetooth/hci_usb.c	Mon May 10 12:03:05 2004
@@ -976,11 +971,13 @@
 static void hci_usb_disconnect(struct usb_interface *intf)
 {
 	struct hci_usb *husb = usb_get_intfdata(intf);
-	struct hci_dev *hdev = husb->hdev;
+	struct hci_dev *hdev;
 
-	if (!husb)
+	if (!husb || intf == husb->isoc_iface)
 		return;
+
 	usb_set_intfdata(intf, NULL);
+	hdev = husb->hdev;
 
 	BT_DBG("%s", hdev->name);