Arch Linux

Shagbag

Member

Registered: 2006-10-25

Posts: 259

Boot process hangs

When I leave GRUB having selected my Arch install, the boot process hangs for about 15 sec at the following line:

ACPI: Embedded Controller [EC0] (gpe 25) interrupt mode.

The next lines are:

Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
pnp: PnP ACPI: found 11 devices
SCSI subsystem initialized

Why is it hanging?  Can I do anything to improve it?

T-Dawg

Forum Fellow

From: Charlotte, NC

Registered: 2005-01-29

Posts: 2,736

Re: Boot process hangs

try noapic at the kernel line.

Shagbag

Member

Registered: 2006-10-25

Posts: 259

Re: Boot process hangs

I altered GRUB to:

kernel  (hd0,5)/boot/vmlinuz26 root=/dev/sda6 ro noacpi

but it didn't work.  I still have the 15 sec hang.  Any other ideas?

EDIT: Duh!  I think I should have passed acpi=off rather than noacpi.  No wonder they call it newbie corner.

T-Dawg

Forum Fellow

From: Charlotte, NC

Registered: 2005-01-29

Posts: 2,736

Re: Boot process hangs

I altered GRUB to:

kernel  (hd0,5)/boot/vmlinuz26 root=/dev/sda6 ro noacpi

but it didn't work.  I still have the 15 sec hang.  Any other ideas?

EDIT: Duh!  I think I should have passed acpi=off rather than noacpi.  No wonder they call it newbie corner.

I said noapic not noacpi.

Shagbag

Member

Registered: 2006-10-25

Posts: 259

Re: Boot process hangs

Quite right. You did.    I'll try it when I get home.

Btw, what does the Advanced Programmable Interrupt Controller do and what effect will it have when I shut it off?

Shagbag

Member

Registered: 2006-10-25

Posts: 259

Re: Boot process hangs

I tried noapci.  Still no joy.  No improvement on the 15 sec hang.  Any other ideas?

stingray

Member

From: Lima, Peru SA

Registered: 2006-03-24

Posts: 188

Re: Boot process hangs

You might try bootchart and see if it shows you what's loading. I haven't tried it, but someone mentioned it the other day. 

Your delay might also be before bootchart kicks in.

Just an idea...

Shagbag

Member

Registered: 2006-10-25

Posts: 259

Re: Boot process hangs

Here's my bootchart image at ImageShack

Help!  What's going on in the first 17 seconds ????

broch

Banned

From: L.A. California

Registered: 2006-11-13

Posts: 975

Re: Boot process hangs

either
acpi=off
or
acpi=noirq

and
noapic (not noacpi and not nopci)

noacpi does not exist (so id does not work)

but
pci=noacpi
is valid option

other GRUB ACPI parameters:
ACPI Kernel Parameters

acpi=force

acpi_irq_balance
acpi_irq_nobalance
acpi_irq_pci=irq-number
acpi_irq_isa=irq-number
acpi=oldboot
acpi=ht

hope this will help

Shagbag

Member

Registered: 2006-10-25

Posts: 259

Re: Boot process hangs

Thanks for the helpful suggestions everyone but, none of them worked.  I've still got the same 15-17sec hang time.
Per my original post, I think it may have more to do with Plug 'n' Play (or is apci the same thing?).  How do I found out what the '11 devices' are that PnP found?  Is there a log somewhere showing them?

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 12,736

Re: Boot process hangs

Check your bios settings.

Look for a setting called something like "PnP OS installed" .
Chances are it's set to Yes , change it to  No .

When this is set to Yes the bios only starts the bare minimum of devices needed to boot and nothing else. The OS needs to start everything else before it can be used.

Almost all x86 systems start faster (and often run better) when it's set to No and the bios takes care of starting all PnP devices.

---

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Try clean chroot manager by graysky