Bug 9662 - boot hang unless button press - EC: GPE = 0x10, I/O: command/status = 0x66, data = 0x62 - Acer 4520
boot hang unless button press - EC: GPE = 0x10, I/O: command/status = 0x66, d...
Product: ACPI
Classification: Unclassified
Component: Other
All Linux
: P1 normal
Assigned To: acpi_other
Depends on:
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Reported: 2007-12-29 13:43 UTC by Dan O'Connell
Modified: 2008-01-01 10:16 UTC (History)
1 user (show)

See Also:
Kernel Version:
Tree: Mainline
Regression: ---


Description Dan O'Connell 2007-12-29 13:43:08 UTC
Most recent kernel where this bug did not occur: NA on this hardware
Distribution: LinuxMint 4.0
Hardware Environment: Acer 4520 (all stock)
Software Environment: Dual-Boot with Vista
Problem Description:  Kernel hangs on boot at:

ACPI: EC: GPE = 0x10, I/O: command/status = 0x66, data = 0x62

Steps to reproduce:

I custom compiled the kernel to solve another ACPI issue which I may file a bug report for later.   I will try with apci=off momentarily.

Oddly enough, when the power button is pressed, the kernel resumes booting and runs as normal! 

acpi=off results in a kernel panic telling me to run with noapic, running with noapic results in it telling me that I need to run with pnpbios=off.   

Finally, if I boot with "acpi=off noapic pnpbios=off" it hangs at loading my DVD-ROM, after about 5 minutes it will give an error dealing with a lack of a root file system, (no /dev/sda5).

This is the latest kernel, so this should be fixed, unless I did something stupid compiling it, then I should be fixed. :-P

Regardless, there have been similar errors on the two stock kernels that shipped with LinuxMint, the fails to boot entirely (power button trick doesn't work) and works with power button trick, albeit at a different point in the boot sequence.

Dan O.
Comment 1 Len Brown 2007-12-30 22:36:00 UTC
Has any version of Linux every booted properly w/o workarounds on this box?

What is the difference between which "fails entirely"
(and how does it fail, does it hang in a different place)
vs., which you report like,
hangs at the ACPI EC message and continues upon a power button press?

Can you try 2.6.24-rc?  There have been some EC issues fixed on Acers
in the latest release.
Comment 2 Dan O'Connell 2007-12-31 20:50:16 UTC
Hey Len, is a LinuxMint stock kernel.   It would start booting, then fail to detect a /dev/root.   Apparently, it wouldn't even recognize the hard drive as a device, thus it failed to boot entirely.

I am compiling 2.6.24-rc right now.  So far everything has gone as normal.

Of note is that I attempted to install Fedora 8 and Fedora 8 Re-Spin (a 12-18-07 update to Fedora 8) and while both installed 100% normal, both failed to boot, both hanging on "/dev/root not found" or similar.

Mind you, I have Linux running on 3 other desktops here, one of which runs a web-server, ftp server, acts as a router and HTPC.  I've been using Linux for about 5 years now and this is the roughest Linux experience I've had in at least 3  years.

Thanks for the reply,

Comment 3 Dan O'Connell 2008-01-01 06:05:33 UTC

I have successfully compiled the latest kernel from the Linus git tree:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git linux26

I used make oldconfig, holding down enter to accept all defaults.

I then made about 3 changes.

1.  Change the CPU architecture to AMD Athlon 64 / Hammer from Generic.
2.  Enable SATA (Prod) support as "built-in" rather than as a module.
3.  Enabled ext3 journaling fs support.   Believe it or not, this was NOT enabled before, and yes, my root fs is ext3.   I also enabled it as built-in.

I also enabled a few SATA drivers as built-in where-as before they were listed as module.

I then ran:
make -j2
make install

And what do you know?  It runs absolutely fine!

Unfortunately, it still hangs on resume from Suspend mode, but I can live with that as long as Hibernate works OK.  (Didn't before).

Just for the record, the current kernel is now:  2.6.24-rc6 

The kernel boots as normal, save for a few PCI warnings.

I just wonder whether it was the newer kernel or the changes I made that did the trick.

Thanks Len, that was a great idea to try the rc kernel. ;)

Comment 4 Len Brown 2008-01-01 10:16:48 UTC
Thanks for testing, Dan.
As the upstream 2.6.24-rc6 kernel works, we're done here.

Re: distros not working on this box.  I'm not familiar
with the (non-Intel:-) chipset, it might be that upstream
has a driver update for it the distros don't have yet.
I expect 2.6.24 will ship shortly, and you'll be able to
get it included with test releases of FC9 etc.

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