Certain machines need to be booted with noapic

I've tried disabling the dsdt with no luck. The 386 compiled version boots fine, but the 686 one freezes. This didn't happened to me in warty, hoary or breezy, where I could succesfully boot the 686-compiled kernel.

Need to know where it fails. Please disable splash and quiet in your boot commands (grub), and also follow this:

https://wiki.ubuntu.com/DebuggingSystemCrash
https://wiki.ubuntu.com/DebuggingIRQProblems

This is /var/log/kern.log when booted from the 386 kernel. Here everything boots correctly

Here I'm attaching some shots I've taken from the boot process with the 686 kernel. Unfortunately the camera is a really crappy one, and the photos aren't very good. Maybe tomorrow I can ask a friend for a better one & upload a better photo. I've taken some & to make it a little bit more complete here are the last lines of the boot process:

[4294671.116000] EISA: Detected 0 cards
[4294671.117000] NET: Registered protocol family 2
[4294671.285000] input: AT Translated Set 2 keyboard as /class/input/input0

Here's my dmesg output on the 386 kernel

I've tried the suggested actions on debugging crashes. The system outputs:

SysRq : Changing logleve
loglevel set to 1
SysRq : Show State

and nothing else happens. I can't to anything usefull in that console... so I don't know what else to do.

Those pics were great. No need to get better ones.

Looks to me like you are experiencing IRQ related issues. Likely it's caused by the fact that the 686 kernel has IOAPIC enabled.

Realistically, you aren't going to get any better out of the 686 kernel than you do out of the 386 kernel performance wise.

I would like to resolve this issue, so how about trying some of the boot options at:

https://wiki.ubuntu.com/DebuggingIRQProblems

I've followed your instructions, first of all I need to boot the 386 kernel with noapic nolapic options or else it won't boot. After trying the other booting options only acpi=off did the trick.

Hi

I want to add that booting with acpi=off leaves my laptop with no battery status & probably more things disabled (which I assumed it's expected). Also, FYI the recent linux kernel update hasn't fixed this issue. Please ask for more info if it's needed.

Thanxs

Can you try pci=noacpi? If this works, then please attach the output of "sudo dmidecode > dmi.txt"

output of dmidecode

Hi

I've managed to boot with pci=noacpi. Interesting results:
- The laptop battery is detected & switching on & off the power supply changes kde's KLaptop icon in the taskbar.

IIRC this didn't happened before, maybe it's because of the recent kernel support for smart batteries?

- Network doesn't work at all. Not even after trying to reestablish a dhcp ip address.

- USB work (I expected this to happen).

I've tried the following:
renamed my DSDT.aml to DSDT.aml_
sudo dpkg-reconfigure linux-image-2.6.15-15-386
rebooted with the 386 kernel & no battery detected, so I don't know why the laptop battery was detected in the previous attempt.

I've got similar issue with Optimus brand celeron based laptop with sis graphic chip (which may imply it's sis-chipset based).

Kernel stopped booting, but after few seconds it detected soft-lockup and displayed stack backtrace. EIP was at mwait_idle().
So I've added 'idle=poll' to kernel command line. Similar hang, EIP at poll_idle().

I was able to boot after REMOVING 'noapic nolapic' from kernel command line.

Any updates on this? Recent kernel updates haven't fixed the problem here.

Thanxs

Hi

For the record, linux image 2.6.15-17 still doesn't fix this bug :(
Same error, stalled in "input: AT Translated set 2 keyboard..."

Hi again,

This bug is marked as "need info". Ben: What kind of information can I supply?

Thanxs

Can you try hitting "ctrl + scroll-lock" when it stops and see if anything comes out on the console? Seems this bug goes further than just our Ubuntu kernel, and I'd like to help get more info on it.

Thanks

Hi

Ctrl+scroll lock revealed some info. I'm attaching a shot.

ctrl+scroll block

Hi

Does the attached info revealed something usefull? I consider a regression on breezy, since I could use the optimized kernel with this computer. If you need more info I can provide please ask.

Thanxs

Hello!, I've been dealing with this boot trouble for more than a month, and the only thing that work for me was the linux-386 image...
Today I removed the kernel option "nolapic", and wow! it works!!!!
The complete line option I use is:

/boot/vmlinuz-2.6.15-19-k7 root=/dev/hda2 ro vga=791 noapic quiet splash

I have an HP nx6125 with a Sempron 2800+, and an upgrade from ubuntu breezy badger to Dapper Drake.

Hope this help someone...

Sorry for my english... Thks to all :)

Hi

I no longer have this laptop, so I'm afraid I can't help anymore with this bug. If someone else sees this behaviour please help Ben, if not, you can close this bug.

Thanxs

I'm running kernel 2-6-15-19 - until I read this discussion my HP Vectra (Pentium 3) wouldn't boot with the 686 version - adding NOAPIC to the Kernel command line solved the problem. To ensure my network card was not sharing an IRQ I already had acpi=noirq on the command line. But everything still **seems** to work. We'll see.

with 2.6.15-26-686 still hang on boot with soft lockup detected. To boo, I have to remove "nolapic" from kernel command line. Working command line for me is: [17179569.184000] Kernel command line: root=/dev/hda5 ro noapic quiet splash.
I'm attaching dmidecode output, so this machine coul dbe autodetected.

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