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

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Date:	Mon, 13 Nov 2006 23:08:36 +0100
From:	"Christian Hoffmann" <Christian.Hoffmann@...lstreetsystems.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Pavel Machek" <pavel@....cz>,
	"Benjamin Herrenschmidt" <benh@...nel.crashing.org>,
	"Andrew Morton" <akpm@...l.org>,
	"Solomon Peachy" <pizza@...ftnet.org>,
	<linux-fbdev-devel@...ts.sourceforge.net>,
	"LKML" <linux-kernel@...r.kernel.org>
Subject: RE: Fwd: [Suspend-devel] resume not working on acer ferrari 4005 with radeonfb enabled

 

> -----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

And then it never goes to sleep. 
BTW: same if I use radeonfb as a module and try to blacklist this
module. It complains that radeonfb is still in use. 
Arghhh :)

Chris


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