https://bugzilla.kernel.org/show_bug.cgi?id=41722





--- Comment #9 from Rogério Brito <rbr...@ime.usp.br>  2011-08-25 21:33:03 ---
Hi, Bjorn.

On Aug 25 2011, bugzilla-dae...@bugzilla.kernel.org wrote:
> --- Comment #5 from Bjorn Helgaas <bhelg...@google.com>  2011-08-25 19:48:13 
> ---
> Do you know whether any version of Linux boots on this system without
> "acpi=off"?

I don't know, but I can try. The only problem is that udev has some
restrictions on the kernel version. :-(

> I did find dmesg logs at
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/343675 (2.6.28) and
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/446911 (2.6.31), which
> suggests that linux booted with ACPI enabled on *some* Clevo M5X0JE systems.

As per the previous bug, the only version of Linux that I got and that
worked before was 2.6.24 and I don't quite remember if I needed acpi=off or
not, but I can try it again, of course, and let you know.

> I assume Windows still boots on this system (to make sure this isn't
> hardware that broke and prevents both Windows and Linux from booting).

No the hardware doesn't appear to be broken. And yes, Windows works fine
(from the little about Windows that I know). I chose to keep it here, as
that's what my mother used to use (but she tells me that she would prefer to
switch).

Anything works well in Windows and I can try to boot with some logging
enabled, if I happen to know where debug messages are sent/put once Windows
boots.

> Based on your debug output, I think the hang happens when we do an outb() to
> I/O port 0x142e to enable ACPI mode.  Do you have any CardBus or other devices
> you could remove, to make sure it's not device-related?

While the notebook has a cardbus bay, it is not in use right now. The only
things that are plugged in right now is the power cord and the ethernet
cable.

I don't have a null cable here to use a serial console or something... I can
try to see if a network console works, but I guess that a PCI card would be
sort of a chicken-and-egg problem, wouldn't it?

Just as a side comment, do these PCI and ACPI problems always go hand in
hand?

I will try to do a binary search with Linux versions to see if there is any
one that can work without acpi=off being passed.


Thanks,

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