linux-kernel - Re: [Linux-fbdev-devel] Fwd: [Suspend-devel] resume not working on acer ferrari 4005 with radeonfb enabled

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Message-Id: <200611142247.55137.chrmhoffmann@gmail.com>
Date:	Tue, 14 Nov 2006 22:47:49 +0100
From:	Christian Hoffmann <chrmhoffmann@...il.com>
To:	linux-fbdev-devel@...ts.sourceforge.net
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Christian Hoffmann" <Christian.Hoffmann@...lstreetsystems.com>,
	Andrew Morton <akpm@...l.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Solomon Peachy <pizza@...ftnet.org>,
	Pavel Machek <pavel@....cz>
Subject: Re: [Linux-fbdev-devel] Fwd: [Suspend-devel] resume not working on acer ferrari 4005 with radeonfb enabled

On Tuesday 14 November 2006 00:08, Rafael J. Wysocki wrote:
> On Monday, 13 November 2006 23:08, Christian Hoffmann wrote:
> > > -----Original Message-----
> > > From: Rafael J. Wysocki [mailto:rjw@...k.pl]
> > > Sent: Monday, November 13, 2006 3:06 PM
> > > To: Christian Hoffmann
> > > Cc: Pavel Machek; Benjamin Herrenschmidt; Andrew Morton;
> > > Solomon Peachy; linux-fbdev-devel@...ts.sourceforge.net; LKML
> > > Subject: Re: Fwd: [Suspend-devel] resume not working on acer
> > > ferrari 4005 with radeonfb enabled
> > >
> > > On Monday, 13 November 2006 11:51, Christian Hoffmann wrote:
> > > > > -----Original Message-----
> > > > > From: Pavel Machek [mailto:pavel@....cz]
> > > > > Sent: Sunday, November 12, 2006 1:14 PM
> > > > > To: Benjamin Herrenschmidt
> > > > > Cc: Christian Hoffmann; Andrew Morton; Solomon Peachy; Rafael J.
> > > > > Wysocki; linux-fbdev-devel@...ts.sourceforge.net; LKML;
> > > > > Christian@...e.sisk.pl; Hoffmann@...ercik.sisk.pl
> > > > > Subject: Re: Fwd: [Suspend-devel] resume not working on
> > >
> > > acer ferrari
> > >
> > > > > 4005 with radeonfb enabled
> > > > >
> > > > > Hi!
> > > > >
> > > > > > > Then the radeonfb doesn't kick in at all (guess some
> > >
> > > pci ids are
> > >
> > > > > > > added in that patch).
> > > > > > >
> > > > > > > BTW: resume/suspend works ok if I have the vesa fb enabled.
> > > > > >
> > > > > > In that case (vesafb), when does the screen come back
> > > > >
> > > > > precisely ? Do
> > > > >
> > > > > > you get console mode back and then X ? Or it only comes
> > >
> > > back when
> > >
> > > > > > going back to X ? Do you have some userland-type vbetool
> > > > >
> > > > > thingy that
> > > > >
> > > > > > bring it back ?
> > > > >
> > > > > He's using s3_bios+s3_mode, so kernel does some BIOS
> > >
> > > calls to reinit
> > >
> > > > > the video. It should come out in text mode, too.
> > > > >
> > > > > Christian, can you unload radeonfb before suspend/reload it after
> > > > > resume?
> > > >
> > > > Will it work if radeonfb is compiled as module? I think I
> > >
> > > had problems
> > >
> > > > with that, but I'll try again.
> > > >
> > > > > Next possibility is setting up serial console and adding some
> > > > > printks to radeon...
> > > >
> > > > Unfortunatly, the laptop doesn't have serial port. I tried to get a
> > > > USB device (pocketpc) read the USB serial, but I only partially
> > > > succeeded. I can pass console=ttyUSB0 to the kernel and
> > >
> > > load the ipaq
> > >
> > > > serial console driver as it oopses. I am able to echo strings to
> > > > /dev/ttyUSB0  and read them on the ipaq, but I am not able to
> > > > "deviate" the kernel messages to that port. Any hints on how to do
> > > > that would be very appreciated, I didn't find anything
> > >
> > > usefull on the
> > >
> > > > web. (I tried with setconsole /dev/ttyUSB0 but it gives error msg
> > > > about device busy or something)
> > >
> > > Would it be practicable to use netconsole on your box?  If
> > > so, it should work.
> >
> > I tried netconsole, and it somehow works, but when suspending it says in
> > an "infinite" loop:
> >
> > unregister_netdevice: waiting for eth2 to become free. Usage count = 1
>
> Hm.  Is your kernel compiled with CONFIG_DISABLE_CONSOLE_SUSPEND set?
>
> Rafael

I tried that patch, but the last message I see over netconsole (using tg3) is:
Suspending console(s)
and then nothing. Nothing on resume at all :(

Adding some printks in the radeonfb_pci_suspend and radeonfb_pci_resume 
(radeon_pm.c) didn't help: I don't see them. But I am not a kernel programmer 
at all, so I might do something wrong or in the wrong place.

Chris

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