* Re: S2RAM broken on HP 8530p (btusb involved)
[not found] ` <alpine.DEB.2.00.1004011814140.2792@parag-laptop>
@ 2010-04-01 22:31 ` Rafael J. Wysocki
0 siblings, 0 replies; only message in thread
From: Rafael J. Wysocki @ 2010-04-01 22:31 UTC (permalink / raw)
To: Parag Warudkar; +Cc: linux-kernel, Marcel Holtmann, linux-bluetooth
On Friday 02 April 2010, Parag Warudkar wrote:
>
> On Thu, 1 Apr 2010, Rafael J. Wysocki wrote:
>
> > On Thursday 01 April 2010, Parag Warudkar wrote:
> > >
> > > On Thu, 1 Apr 2010, Rafael J. Wysocki wrote:
> > >
> > > > Please try:
> > > >
> > > > # echo devices > /sys/power/pm_test
> > > > # echo mem > /sys/power/state
> > > >
> > > > and see if that breaks too (it should get back to the command line in about
> > > > 5-10 seconds).
> > >
> > > That breaks too - hangs similarly during suspend. I enabled RTC tracing
> > > and every time it prints out different hash matches after reboot -
> > > tty/tty21, pcie04 and latest is
> > >
> > > [ 0.865296] pcieport 0000:00:1c.1: hash matches
> > >
> > > Also when the suspend fails the immediate boot after that I get a USB
> > > error on startup - unable to enumerate usb device on port 1. This error is
> > > not present on normal boots.
> >
> > Well, try the above with the USB controller drivers unloaded.
> >
>
> Turns out its not the controller drivers but btusb and friends. Once I
> removed btusb,sco,bnep,l2cap and family I was able to suspend resume just
> like before.
>
> For now I have disabled Bluetooth in BIOS as I don't need it - it is
> likely that it was disabled earlier and so the suspend/resume was
> working but looks like after a BIOS update/reset I left it enabled.
>
> So this does not seem to be a regression to me.
>
> But may be it should be possible to suspend/resume with bluetooth enabled?
> :)
Sure.
Adding CCs to the bluetooth people.
Rafael
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