[Bluez-devel] Suspend/resume issues with bluez

[Bluez-devel] Suspend/resume issues with bluez

[Mitsu Hadeishi]

Hi, just thought I'd run this issue past you folks.  I'm running the bluez 
stack and utilities from Debian unstable on kernel 2.4.22-x1 (Xandros Desktop 
2) on a Thinkpad T40p.  It seems to run fine when I first boot; I am able to 
discover other devices, they can discover me.  I am a newbie trying to use 
this protocol stack; so I haven't yet gotten any applications to work yet.  
However, it seems to function, basically.

The problem is bluez never seems to work again after a suspend/resume.  I have 
tried shutting down the Bluetooth card (you can do with with Fn-F5 on a 
Thinkpad) before suspending, as well as doing hciconfig hci0 down, and even 
rmmod rfcomm, rmmod hci_usb (rmmod l2cap never seems to work) before 
suspending, and then modprobe them back afterwards.  Though my machine does 
not hang or crash when coming back from suspend, the Bluetooth card never 
works again.  hciconfig -a prints nothing.

Interestingly, before I installed the bluez stack, whenever I hit Fn-F5 it 
would freeze my machine.  Now, it doesn't freeze it, but correctly toggles 
the little LED saying Bluetooth is active/inactive.  When bluez is working, 
Fn-F5 makes hciconfig -a report the device there, then Fn-F5 again will make 
hciconfig -a report nothing.  But after a suspend/resume, Fn-F5 will *still* 
toggle the Bluetooth LED, but hciconfig -a never shows a card.

Rebooting the system causes bluez to work again.

Mitsu
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Re: [Bluez-devel] Suspend/resume issues with bluez

[Colin Pinkney]

=2D----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Wednesday 03 Mar 2004 03:02, Mitsu Hadeishi wrote:
> Hi, just thought I'd run this issue past you folks.  I'm running the bluez
> stack and utilities from Debian unstable on kernel 2.4.22-x1 (Xandros
> Desktop 2)=20
=2E..
> The problem is bluez never seems to work again after a suspend/resume.  I
> have tried shutting down the Bluetooth card (you can do with with Fn-F5 on
> a Thinkpad) before suspending, as well as doing hciconfig hci0 down, and
> even rmmod rfcomm, rmmod hci_usb (rmmod l2cap never seems to work) before
> suspending, and then modprobe them back afterwards. =20

We get that on the Sharp Zaurus Linux PDA with any Bluetooth CF card. After=
 a=20
suspend/resume of the PDA, all operations on the Bluetooth card just timeou=
t.

> Rebooting the system causes bluez to work again.

Since the Zaurus does not have builtin Bluetooth, every Zaurus must use=20
Bluetooth CF cards so we're able to eject the card and reinsert it. Nothing=
=20
else brings it back (apart from a reboot of course), not even things like=20
'cardctl reset'. But at least the ejecting and reinserting can be automated=
=20
which I put into a script that is run on every resume. I guess you don't ha=
ve=20
this option though if the Bluetooth device is built into your laptop.

BTW the Affix Bluetooth drivers have no problem with suspending and resumin=
g.=20
Is your Bluetooth device supported by Affix?

=2D --=20
Colin Pinkney
http://www.cpinkney.org.uk
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Re: [Bluez-devel] Suspend/resume issues with bluez

[Mitsu Hadeishi]

Hi,

Just a note to the list regarding suspend/resume.  I have a Thinkpad T40p 
which was having problems with bluez and suspend/resume.  I just tried 
installing the Affix drivers on my Thinkpad T40p; but I had the same problem 
(well, it was slightly different, but the upshot was, Bluetooth didn't work 
when I came back from suspend).

So I tried a suggestion written by someone else on this list, which was not 
only to unload all of the Bluetooth modules, but also unload and reload the 
USB modules.  This DID work, at least with the Affix drivers.  Perhaps the 
same trick would work with the bluez drivers.

Basically I have a script which rmmod's all the affix modules, then rmmod's 
all the usb modules I could find (usb-uhci, hid, ehci-hcd) --- though I don't 
know if I really need to unload them all.

Doing a modprobe of those modules again caused the Affix drivers to come back 
(though sometimes I have to do it twice, i.e., run the rmmod's then the 
modprobes, then rmmod's again, then modprobes again).

Mitsu

On 03/03/2004 05:24 pm, Colin Pinkney wrote:
> Since the Zaurus does not have builtin Bluetooth, every Zaurus must use
> Bluetooth CF cards so we're able to eject the card and reinsert it. Nothing
> else brings it back (apart from a reboot of course), not even things like
> 'cardctl reset'. But at least the ejecting and reinserting can be automated
> which I put into a script that is run on every resume. I guess you don't
> have this option though if the Bluetooth device is built into your laptop.
>
> BTW the Affix Bluetooth drivers have no problem with suspending and
> resuming. Is your Bluetooth device supported by Affix?
>
> - --
> Colin Pinkney
> http://www.cpinkney.org.uk
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.2 (GNU/Linux)
>
> iD8DBQFARlsIioDqRlN9/eURAqT7AKDPD9uUEcDw4TezKbAf3h+EgSMwlgCfTOXK
> ttu8XI/LaXZKvCFlANA0Wmc=
> =nKSA
> -----END PGP SIGNATURE-----
>
>
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Re: [Bluez-devel] Suspend/resume issues with bluez

[Marcel Holtmann]

Hi Mitsu,

> Just a note to the list regarding suspend/resume.  I have a Thinkpad T40p 
> which was having problems with bluez and suspend/resume.  I just tried 
> installing the Affix drivers on my Thinkpad T40p; but I had the same problem 
> (well, it was slightly different, but the upshot was, Bluetooth didn't work 
> when I came back from suspend).

I think the problem is in the USB subsystem at the moment. There are
some outstanding issues with some USB cards, but Alan Stern is going to
fix them. This will only happen for 2.6.x and I don't think that these
issues can be solved in 2.4, too.

Regards

Marcel




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[Bluez-users] Re: [Bluez-devel] Suspend/resume issues with bluez

[Colin Pinkney]

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Hash: SHA1

On Wednesday 10 Mar 2004 00:04, Marcel Holtmann wrote:
> Hi Mitsu,
>
> > Just a note to the list regarding suspend/resume.  I have a Thinkpad T4=
0p
> > which was having problems with bluez and suspend/resume.  I just tried
> > installing the Affix drivers on my Thinkpad T40p; but I had the same
> > problem (well, it was slightly different, but the upshot was, Bluetooth
> > didn't work when I came back from suspend).
>
> I think the problem is in the USB subsystem at the moment. There are
> some outstanding issues with some USB cards, but Alan Stern is going to
> fix them. This will only happen for 2.6.x and I don't think that these
> issues can be solved in 2.4, too.

This also happens with CF cards on the Sharp Zaurus. The only way I have fo=
und=20
to get Bluetooth cards to come back after a suspend is to do:

cardctl eject
cardctl insert

I think the Bluetooth kernel modules are 'busy' after a suspend so you cann=
ot=20
remove them and insmod them again.

The Affix drivers survive suspend/resume fine on the Zaurus, but I much pre=
fer=20
the BlueZ drivers.

=2D --=20
Colin Pinkney
http://www.cpinkney.org.uk
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Re: [Bluez-devel] Suspend/resume issues with bluez

[Nils Faerber]

Am Di, den 09.03.2004 schrieb Mitsu Hadeishi um 23:54:
> Hi,
Hi!

> Just a note to the list regarding suspend/resume.  I have a Thinkpad T40p 
> which was having problems with bluez and suspend/resume.  I just tried 
> installing the Affix drivers on my Thinkpad T40p; but I had the same problem 
> (well, it was slightly different, but the upshot was, Bluetooth didn't work 
> when I came back from suspend).
> 
> So I tried a suggestion written by someone else on this list, which was not 
> only to unload all of the Bluetooth modules, but also unload and reload the 
> USB modules.  This DID work, at least with the Affix drivers.  Perhaps the 
> same trick would work with the bluez drivers.

>>From my experience simply unloading the USB host controller driver
should be fully sufficient!
What happens is that the host controller is first removed. With removing
the host all devices disappear and are freed automatically.
When the system comes back simply insmod the host controller driver
again. The host will come back up and all devices are discovered as new
devices and will be initialised properly.

It may be though that you have to wait a moment after removing the host
controller driver module, like "sleep 1" before going to sleep. The 2.4.
kernel still has some problems to identify in some circumstances if all
pre-suspend actions have been performed properly.

On Debian I do on suspend

	/etc/hotplug/usb.rc stop
	sleep 1

and of course the inverse on resume

	/etc/hotplug/usb.rc start

without sleeping.

Works really good and also prevents some other nasty USB problems.

> Mitsu
CU
  nils faerber

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Re: [Bluez-devel] Suspend/resume issues with bluez

[Paul Ionescu]

Hi Mitsu,

On T40* the bluetooth adapter is an USB one, so you can try to remove
all USB modules before suspend, and load them again after resume.

On Wed, 2004-03-03 at 05:02, Mitsu Hadeishi wrote:
> Hi, just thought I'd run this issue past you folks.  I'm running the bluez 
> stack and utilities from Debian unstable on kernel 2.4.22-x1 (Xandros Desktop 
> 2) on a Thinkpad T40p.  It seems to run fine when I first boot; I am able to 
> discover other devices, they can discover me.  I am a newbie trying to use 
> this protocol stack; so I haven't yet gotten any applications to work yet.  
> However, it seems to function, basically.
> 
> The problem is bluez never seems to work again after a suspend/resume.  I have 
> tried shutting down the Bluetooth card (you can do with with Fn-F5 on a 
> Thinkpad) before suspending, as well as doing hciconfig hci0 down, and even 
> rmmod rfcomm, rmmod hci_usb (rmmod l2cap never seems to work) before 
> suspending, and then modprobe them back afterwards.  Though my machine does 
> not hang or crash when coming back from suspend, the Bluetooth card never 
> works again.  hciconfig -a prints nothing.
> 
> Interestingly, before I installed the bluez stack, whenever I hit Fn-F5 it 
> would freeze my machine.  Now, it doesn't freeze it, but correctly toggles 
> the little LED saying Bluetooth is active/inactive.  When bluez is working, 
> Fn-F5 makes hciconfig -a report the device there, then Fn-F5 again will make 
> hciconfig -a report nothing.  But after a suspend/resume, Fn-F5 will *still* 
> toggle the Bluetooth LED, but hciconfig -a never shows a card.
> 
> Rebooting the system causes bluez to work again.
> 
> Mitsu



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