[resend] intel_agp: Don't oops with zero stolen memory
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From: Eric Anholt on 1 Jul 2010 18:50 On Wed, 16 Jun 2010 10:13:52 +0200, Ondrej Zary <linux(a)rainbow-software.org> wrote: > When "onboard video memory" is set do "disabled" in BIOS on Asus P4P800-VM > board (i865G), kernel oopses with memory corruption: > https://bugs.freedesktop.org/show_bug.cgi?id=28430 > > Fix that by cleanly aborting the initialization. > > Signed-off-by: Ondrej Zary <linux(a)rainbow-software.org> I haven't seen a system with that option before. Is the integrated graphics still supposed to work at that point, or is it "graphics is disabled."? What do other OSes do here?
From: Ondrej Zary on 2 Jul 2010 16:00 On Friday 02 July 2010 00:44:39 Eric Anholt wrote: > On Wed, 16 Jun 2010 10:13:52 +0200, Ondrej Zary <linux(a)rainbow-software.org> wrote: > > When "onboard video memory" is set do "disabled" in BIOS on Asus > > P4P800-VM board (i865G), kernel oopses with memory corruption: > > https://bugs.freedesktop.org/show_bug.cgi?id=28430 > > > > Fix that by cleanly aborting the initialization. > > > > Signed-off-by: Ondrej Zary <linux(a)rainbow-software.org> > > I haven't seen a system with that option before. Is the integrated > graphics still supposed to work at that point, or is it "graphics is > disabled."? What do other OSes do here? Testing it right now with Windows XP. Integrated graphics works as secondary only when the "onboard video memory" is set to "disabled"! If anything other is set (e.g. 1MB or 32MB), the driver does not load (code 10). -- Ondrej Zary -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Eric Anholt on 2 Jul 2010 17:00 On Fri, 2 Jul 2010 21:59:20 +0200, Ondrej Zary <linux(a)rainbow-software.org> wrote: > On Friday 02 July 2010 00:44:39 Eric Anholt wrote: > > On Wed, 16 Jun 2010 10:13:52 +0200, Ondrej Zary <linux(a)rainbow-software..org> > wrote: > > > When "onboard video memory" is set do "disabled" in BIOS on Asus > > > P4P800-VM board (i865G), kernel oopses with memory corruption: > > > https://bugs.freedesktop.org/show_bug.cgi?id=28430 > > > > > > Fix that by cleanly aborting the initialization. > > > > > > Signed-off-by: Ondrej Zary <linux(a)rainbow-software.org> > > > > I haven't seen a system with that option before. Is the integrated > > graphics still supposed to work at that point, or is it "graphics is > > disabled."? What do other OSes do here? > > Testing it right now with Windows XP. Integrated graphics works as secondary > only when the "onboard video memory" is set to "disabled"! If anything other > is set (e.g. 1MB or 32MB), the driver does not load (code 10). OK, I was thinking in that case that we should fix the AGP driver's math so that it correctly set up a chip with no stolen memory allocation. On the other hand, I don't think we know what the correct math is, so maybe we should just go ahead with disabling AGP in that case.
From: Ondrej Zary on 2 Jul 2010 18:00 On Friday 02 July 2010 22:57:36 Eric Anholt wrote: > On Fri, 2 Jul 2010 21:59:20 +0200, Ondrej Zary <linux(a)rainbow-software.org> wrote: > > On Friday 02 July 2010 00:44:39 Eric Anholt wrote: > > > On Wed, 16 Jun 2010 10:13:52 +0200, Ondrej Zary > > > <linux(a)rainbow-software.org> > > > > wrote: > > > > When "onboard video memory" is set do "disabled" in BIOS on Asus > > > > P4P800-VM board (i865G), kernel oopses with memory corruption: > > > > https://bugs.freedesktop.org/show_bug.cgi?id=28430 > > > > > > > > Fix that by cleanly aborting the initialization. > > > > > > > > Signed-off-by: Ondrej Zary <linux(a)rainbow-software.org> > > > > > > I haven't seen a system with that option before. Is the integrated > > > graphics still supposed to work at that point, or is it "graphics is > > > disabled."? What do other OSes do here? > > > > Testing it right now with Windows XP. Integrated graphics works as > > secondary only when the "onboard video memory" is set to "disabled"! If > > anything other is set (e.g. 1MB or 32MB), the driver does not load (code > > 10). > > OK, I was thinking in that case that we should fix the AGP driver's math > so that it correctly set up a chip with no stolen memory allocation. On > the other hand, I don't think we know what the correct math is, so maybe > we should just go ahead with disabling AGP in that case. Someone from Intel should know how to fix this properly. -- Ondrej Zary -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Eric Anholt on 5 Jul 2010 13:00
On Wed, 16 Jun 2010 10:13:52 +0200, Ondrej Zary <linux(a)rainbow-software.org> wrote: > When "onboard video memory" is set do "disabled" in BIOS on Asus P4P800-VM > board (i865G), kernel oopses with memory corruption: > https://bugs.freedesktop.org/show_bug.cgi?id=28430 > > Fix that by cleanly aborting the initialization. Applied to -next. |