Re: PROBLEM: ACPI freezes 2.6.1 on boot

Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Linus Torvalds]

On Wed, 21 Jan 2004, Georg C. F. Greve wrote:
> 
> I'm now seeing the _exact same problem_ on an ASUS M2400N [*] with a
> Linux 2.6.1 (unpatched) kernel. The kernel freezes after printing 
> 
>  "ACPI: IRQ 9 was Edge Triggered, setting to Level Triggerd" 

Does it go away if you just make "acpi_pic_set_level_irq()" do nothing (ie 
just remove the "outb()" call

	arch/i386/kernel/acpi/boot.c line 273

or just make the if-statement be always false).

It's entirely possible that the SCI is just horribly broken, and can't be 
level-triggered.

Btw, usually a good idea to at least cc the developer list for the 
particular subsystem. In this case <acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>. 
Many people don't have the time to follow linux-kernel.

		Linus


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Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Georg C. F. Greve]

|| On 2004-01-21 18:56:59, Linus Torvalds wrote:

 > Does it go away if you just make "acpi_pic_set_level_irq()" do
 > nothing (ie just remove the "outb()" call
 > 
 > 	arch/i386/kernel/acpi/boot.c line 273
 > 
 > or just make the if-statement be always false).

 > It's entirely possible that the SCI is just horribly broken, and
 > can't be level-triggered.

Just tried removing the outb() call both from plain vanilla 2.6.1 and
one with the latest ACPI patch. No change. The system freezes with the
same message at the same point during bootup.

Any other ideas?

Regards,
Georg

-- 
Georg C. F. Greve                                       <greve-mXXj517/zsQ@public.gmane.org>
Free Software Foundation Europe	                 (http://fsfeurope.org)
Brave GNU World	                           (http://brave-gnu-world.org)


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Re: Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Sérgio Monteiro Basto]

And disable apic (lopic and io-pic) options from kernel compilation ?


On Wed, 2004-01-21 at 21:15, Georg C. F. Greve wrote:
> || On 2004-01-21 18:56:59, Linus Torvalds wrote:
> 
>  > Does it go away if you just make "acpi_pic_set_level_irq()" do
>  > nothing (ie just remove the "outb()" call
>  > 
>  > 	arch/i386/kernel/acpi/boot.c line 273
>  > 
>  > or just make the if-statement be always false).
> 
>  > It's entirely possible that the SCI is just horribly broken, and
>  > can't be level-triggered.
> 
> Just tried removing the outb() call both from plain vanilla 2.6.1 and
> one with the latest ACPI patch. No change. The system freezes with the
> same message at the same point during bootup.
> 
> Any other ideas?
> 
> Regards,
> Georg

-- 
Sérgio M B




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Re: Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Georg C. F. Greve]

 || On 21 Jan 2004 21:51:27 +0000
 || Sérgio Monteiro Basto <sergiomb-hHo3WeeoaswVhHzd4jOs4w@public.gmane.org> wrote: 

 smb> And disable apic (lopic and io-pic) options from kernel compilation ?

Funny -- we seemed to have had the same idea. 

Yes, this makes it boot (see my other mail).

Regards,
Georg

-- 
Georg C. F. Greve                                       <greve-mXXj517/zsQ@public.gmane.org>
Free Software Foundation Europe	                 (http://fsfeurope.org)
Brave GNU World	                           (http://brave-gnu-world.org)


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Re: Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Sérgio Monteiro Basto]

So you are another APIC victim :)

The funny thing, is that I thought that because, 
Linus has write :
"It's entirely possible that the SCI is just horribly broken, and can't
be level-triggered" about "ACPI: IRQ 9 was Edge Triggered, setting to
Level Triggerd".

And thinking, can be true ? that, if SCI can't be level-triggered (like
my laptop and yours), kernel with APIC (loapic or smp) options will hang
on boot !

On Wed, 2004-01-21 at 22:33, Georg C. F. Greve wrote:
>  || On 21 Jan 2004 21:51:27 +0000
>  || Sérgio Monteiro Basto <sergiomb-hHo3WeeoaswVhHzd4jOs4w@public.gmane.org> wrote: 
> 
>  smb> And disable apic (lopic and io-pic) options from kernel compilation ?
> 
> Funny -- we seemed to have had the same idea. 
> 
> Yes, this makes it boot (see my other mail).
> 
> Regards,
> Georg
> 
> -- 
> Georg C. F. Greve                                       <greve-mXXj517/zsQ@public.gmane.org>
> Free Software Foundation Europe	                 (http://fsfeurope.org)
> Brave GNU World	                           (http://brave-gnu-world.org)
-- 
Sérgio M B




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Re: Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Georg C. F. Greve]

 || On 21 Jan 2004 23:31:43 +0000
 || Sérgio Monteiro Basto <sergiomb-hHo3WeeoaswVhHzd4jOs4w@public.gmane.org> wrote: 

 smb> So you are another APIC victim :)

Seems that way. :)


 smb> [...]

 smb> And thinking, can be true ? that, if SCI can't be
 smb> level-triggered (like my laptop and yours), kernel with APIC
 smb> (loapic or smp) options will hang on boot !

But can it really not be level triggered? 

My dmesg output tells me explicitly that it switched to level
triggered successfully when APIC is disabled.

So is that message wrong or is there a problem between APIC/ACPI?

Should we not be able to resolve that problem anytime soon, I would
suggest to add some information about this to the Kernel help for both
ACPI and APIC, like:

"
 CAUTION: 
 On some laptops, enabling both local APIC and ACPI can cause
 problems.  Should your system hang during boot with a message like
  'ACPI: IRQ X was Edge Triggered, setting to Level Triggerd'
 you should disable either local APIC (recommended) or ACPI. 
 See http://bugzilla.kernel.org/show_bug.cgi?id=1774 for details.
"

that could save people a lot of time in the future hunting down that
bug again -- also it should limit the amount of mails sent around on
the topic. :)

Regards,
Georg

-- 
Georg C. F. Greve                                       <greve-mXXj517/zsQ@public.gmane.org>
Free Software Foundation Europe	                 (http://fsfeurope.org)
Brave GNU World	                           (http://brave-gnu-world.org)


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Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Linus Torvalds]

On Wed, 21 Jan 2004, Georg C. F. Greve wrote:
> 
> Just tried removing the outb() call both from plain vanilla 2.6.1 and
> one with the latest ACPI patch. No change. The system freezes with the
> same message at the same point during bootup.
> 
> Any other ideas?

Nope. It would probably help to enable ACPI debugging, and see if there 
are any other messages printed.

And it would also help to go back to the working kernel (somebody said 
2.6.1-rc1 worked), and try to see what the differences are and what is the 
first kernel that breaks. -rc2? -rc3? or 2.6.1-final?

		Linus


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RE: PROBLEM: ACPI freezes 2.6.1 on boot

[Brown, Len]

Didn't see that report b/c it was filed against "Alternate Trees".  I've
updated it to be against "ACPI" and assigned it to myself -- lets work
it there.

Thanks,
-Len

> -----Original Message-----
> From: Georg C. F. Greve [mailto:greve-1r/uNngapc3YtjvyW6yDsg@public.gmane.org] On Behalf Of 
> Georg C. F. Greve
> Sent: Wednesday, January 21, 2004 4:22 PM
> To: Nakajima, Jun
> Cc: Martin Loschwitz; linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Brown, 
> Len; acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> Subject: Re: PROBLEM: ACPI freezes 2.6.1 on boot
> 
> 
>  || On Wed, 21 Jan 2004 08:32:50 -0800
>  || "Nakajima, Jun" <jun.nakajima-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote: 
> 
>  nj> Right now I forwarded this to linux-acpi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, but copying
>  nj> the ACPI mailing list acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org would be
>  nj> helpful in general. Len can provide more specific directions for
>  nj> reporting ACPI bugs.
> 
> Thanks.
> 
> FYI, there is a bug on the Linux kernel bugzilla corresponding to this
> problem: 
> 
         http://bugzilla.kernel.org/show_bug.cgi?id=1774

Regards,
Georg

-- 
Georg C. F. Greve                                       <greve-mXXj517/zsQ@public.gmane.org>
Free Software Foundation Europe	                 (http://fsfeurope.org)
Brave GNU World	                           (http://brave-gnu-world.org)


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RE: PROBLEM: ACPI freezes 2.6.1 on boot

[Nakajima, Jun]

Right now I forwarded this to linux-acpi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, but copying the ACPI
mailing list acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org would be helpful in
general. Len can provide more specific directions for reporting ACPI
bugs.

Thanks,
Jun
> -----Original Message-----
> From: linux-kernel-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org [mailto:linux-kernel-
> owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org] On Behalf Of Georg C. F. Greve
> Sent: Wednesday, January 21, 2004 8:12 AM
> To: Martin Loschwitz
> Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Subject: Re: PROBLEM: ACPI freezes 2.6.1 on boot
> 
>  || On Wed, 21 Jan 2004 16:35:51 +0100
>  || Martin Loschwitz <madkiss-R0iKqZn4BxJAfugRpC6u6w@public.gmane.org> wrote:
> 
>  ml> By now means. I, however, didn't even try to get a solution since
>  ml> back then. Since the bug appeared with a patched 2.6.0 and
>  ml> 2.6.1-mm2, which was one of the first patches including the new
>  ml> ACPI, it was clear to me that it was ACPI related and that I
>  ml> would better wait for somebody to find the root of the evil and
>  ml> to kill it.
> 
> Damn. ACPI being somewhat a central issue, I hoped someone had picked
> it up already. Did you write to the ACPI list about it? My mail
> apparently didn't make it (couldn't see it in the archive).
> 
> 
>  ml> I see your "Notebook vs. Linux"-story continues to be
>  ml> unsuccessfull, though :(
> 
> Yup, it seems that way. It is an eternal struggle. *sigh*
> 
> Nice to see that someone read the issue, though. :)
> 
> Regards,
> Georg
> 
> --
> Georg C. F. Greve
<greve-mXXj517/zsQ@public.gmane.org>
> Free Software Foundation Europe
> (http://fsfeurope.org)
> Brave GNU World
(http://brave-gnu-world.org)


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Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Georg C. F. Greve]

 || On Wed, 21 Jan 2004 08:32:50 -0800
 || "Nakajima, Jun" <jun.nakajima@intel.com> wrote: 

 nj> Right now I forwarded this to linux-acpi@intel.com, but copying
 nj> the ACPI mailing list acpi-devel@lists.sourceforge.net would be
 nj> helpful in general. Len can provide more specific directions for
 nj> reporting ACPI bugs.

Thanks.

FYI, there is a bug on the Linux kernel bugzilla corresponding to this
problem: 

         http://bugzilla.kernel.org/show_bug.cgi?id=1774

Regards,
Georg

-- 
Georg C. F. Greve                                       <greve@gnu.org>
Free Software Foundation Europe	                 (http://fsfeurope.org)
Brave GNU World	                           (http://brave-gnu-world.org)

Re: PROBLEM: ACPI freezes 2.6.1 on boot

[Georg C. F. Greve]

UPDATE:

Out of curiosity and because it seemed to be the interrupt handling
that was problematic, I disabled "Local APIC support on uniprocessors."

That convinced the machine to boot with ACPI.

Here is an excerpt from dmesg regarding ACPI only:

[...]
ACPI: RSDP (v000 ACPIAM                                    ) @ 0x000f4b60
ACPI: RSDT (v001 A M I  OEMRSDT  0x06000310 MSFT 0x00000097) @ 0x1f740000
ACPI: FADT (v002 A M I  OEMFACP  0x06000310 MSFT 0x00000097) @ 0x1f740200
ACPI: OEMB (v001 A M I  OEMBIOS  0x06000310 MSFT 0x00000097) @ 0x1f750040
ACPI: DSDT (v001  0ABBD 0ABBD001 0x00000001 MSFT 0x0100000d) @ 0x00000000
[...]
ACPI: Subsystem revision 20031002
ACPI: IRQ 9 was Edge Triggered, setting to Level Triggerd
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (00:00)
[...]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P1._PRT]
ACPI: Embedded Controller [EC0] (gpe 28)
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 *5 6 7 11 12)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 12)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 *5 6 7 12)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 *5 6 7 12)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 12)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 12)
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 12)
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 *4 5 6 7 12)
ACPI: Power Resource [GFAN] (off)
[...]
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 5
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 5
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 5
ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 4
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 5
PCI: Using ACPI for IRQ routing
PCI: if you experience problems, try using option 'pci=noacpi' or even 'acpi=off'
[...]
speedstep-centrino: found "Intel(R) Pentium(R) M processor 1600MHz": max frequency: 1600000kHz
[...]
ACPI: AC Adapter [AC0] (on-line)
ACPI: Battery Slot [BAT0] (battery present)
ACPI: Power Button (FF) [PWRF]
ACPI: Sleep Button (CM) [SLPB]
ACPI: Lid Switch [LID]
ACPI: Fan [FN00] (off)
ACPI: Processor [CPU1] (supports C1 C2 C3, 8 throttling states)
ACPI: Thermal Zone [THRM] (54 C)
Asus Laptop ACPI Extras version 0.26
  M2N model detected, supported
[...]
Resume Machine: resuming from /dev/hda8
Resuming from device hda8
Resume Machine: This is normal swap space
PM: Reading pmdisk image.
PM: Resume from disk failed.
ACPI: (supports S0 S1 S3 S4 S5)
[...]


This looks pretty good, I think. Already checked some
funcionality. Suspend to RAM seems to work, although the display
remains dark on restart (but normal shutdown works, so the machine is
definitely back up).

So the problem we've been seeing seems to be related to the
interaction between local APIC support and ACPI.

I hope this helps tracking it down...

Regards,
Georg


P.S. Martin? Can you reproduce this?

-- 
Georg C. F. Greve                                       <greve-mXXj517/zsQ@public.gmane.org>
Free Software Foundation Europe	                 (http://fsfeurope.org)
Brave GNU World	                           (http://brave-gnu-world.org)


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