linux-kernel - Re: [BISECTED] agp/intel: revert "Remove confusion of stolen entries not stolen memory"

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Date:	Fri, 21 Jan 2011 17:05:51 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Chris Wilson <chris@...is-wilson.co.uk>
Cc:	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
	David Airlie <airlied@...ux.ie>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [BISECTED] agp/intel: revert "Remove confusion of stolen entries
 not stolen memory"

On Fri, Jan 21, 2011 at 12:24:14AM +0100, Frederic Weisbecker wrote:
> On Mon, Dec 20, 2010 at 09:06:47PM +0000, Chris Wilson wrote:
> > On Mon, 20 Dec 2010 21:52:38 +0100, Arnd Bergmann <arnd@...db.de> wrote:
> > > On Monday 20 December 2010 20:52:07 Chris Wilson wrote:
> > > > 
> > > > Also, which modules do you have loaded when using VESA? i.e. is the
> > > > i915.ko loaded, but in UMS mode (i915.modeset=0)?
> > > 
> > > This doesn't seem to matter, as far as I can tell, i915 can be loaded
> > > or now.
> > 
> > Thanks, that rules out the likely explanation that we [i915] loaded the
> > GTT with some conflicting entries. Instead it is likely the initialisation
> > of the GTT to point to the scratch page that is triggering the problem.
> > Can you try disabling it with:
> 
> Hi,
> 
> I have the problem too with -rc1, and even with latest linus tree.
> 
> I too bisected back to:
> "agp/intel: Remove confusion of stolen entries not stolen memory)"
> (c64f7ba5f1006d8c20eacafecf98d4d00a6902a0)
> 
> Symptom is I see a big vertical cursor blinking in my screen and
> nothing else. If something tries to be displayed it gets very messy.
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hi,

same for me, it's showing just blinking horizontal white lines

I use following kernel command line:
"fbcon=rotate:3 vga=0x318"

and bissected the issue to the same commit

agp/intel: Remove confusion of stolen entries not stolen memory
commit c64f7ba5f1006d8c20eacafecf98d4d00a6902a0
Author: Chris Wilson <chris@...is-wilson.co.uk>
Date:   Tue Nov 23 14:24:24 2010 +0000

I'm attaching lspci -vvv and my config file,
please let me know if you need more info/retest

thanks,
jirka

View attachment "lspci" of type "text/plain" (16668 bytes)

View attachment "config" of type "text/plain" (52139 bytes)