linux-kernel - Re: Weird suspend/resume problem on HP nx6325 w/ openSUSE 11.2 w/ -rc8

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Date:	Fri, 27 Nov 2009 02:04:15 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Dave Airlie <airlied@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	DRI <dri-devel@...ts.sourceforge.net>
Subject: Re: Weird suspend/resume problem on HP nx6325 w/ openSUSE 11.2 w/ -rc8

On Sunday 22 November 2009, Dave Airlie wrote:
> On Sun, Nov 22, 2009 at 9:15 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> > Hi,
> >
> > I'm not really sure where this should be reported, but here it goes.
> >
> > After installing openSUSE 11.2 on my testbed nx6325 I noticed that resume
> > (from suspend to RAM) stopped working on it.  Apparently, it hanged while
> > switching from the console back to X and the box remained completely
> > unresponsive after that (it didn't even react to the magic sysrq).  However,
> > it used to work just fine with -rc7 and openSUSE 11.1, so I figured the problem
> > was related to the new X driver, which is radeon module version 6.12.4 (xorg
> > server 1.6.5).
> >
> > So, I started to investigate and found that after a suspend from a framebuffer
> > console, the resume had always worked.  However, when I switched from X to the
> > framebuffer console, suspended, resumed and switched back to X, the box hanged
> > immediately just like during resume after a suspend from under X.  [There also
> > were some problems when switching from X to the framebuffer console and back
> > which seemd to be independent of suspend/resume (in short, the screen stays
> > black after a switch from the framebuffer console to X and you need to kill X
> > to fix this).]
> 
> You are using radeonfb on it? or vesafb?

vesafb

> first test is to try without either of those installed.

That doesn't change the behavior AFAICS.

> From memory though that machines an Xpress 200M

Yes, it has this one.

> which is the the worst graphics card for use with open drivers and has
> always caused no-end of pain.

Too bad. :-(

> Its also mostly undocumented when it comes to errata and workarounds.

Well, so I guess this is a hardware errata.

Still, it worked with the older X, so I wonder if I can make the new X work
like the old one?

Best,
Rafael
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