BUG: soft lockup detected on CPU#0!

Asked by af on 2007-02-12

Latitude D820, 1 GB RAM, Centrino Duo 2 Mhz

Ubuntu 6.10 Desktop full updated yesterday night.
But already yesterday in the after noon, starting the installation from CD I got the same error once. Then I installed without trouble rebooting the system at least twice.

The lockup is triggered at the end of startup when the system tries to configure ethernet cards, but also starting in single user mode and also commenting out the network initialization, few seconds after giving the login: prompt.

Worst, now also the installation CD's startup triggers the same error.

For some seconds after lokup, SysREQ is yet working.

What can I try?

Now I'm writing from the same laptop with knoppix 5.1.1.

If it can be useful here you are the lspci:
root@Knoppix:~# lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 01)
00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 4 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controller IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation Quadro NVS 110M / GeForce Go 7300 (rev a1)
03:01.0 CardBus bridge: O2 Micro, Inc. Cardbus bridge (rev 21)
03:01.4 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5752 Gigabit Ethernet PCI Express (rev 02)
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)

regards,

Andrea Ferraris

Question information

Language:
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Status:
Solved
For:
Ubuntu Edit question
Assignee:
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Solved by:
af
Solved:
2007-02-12
Last query:
2007-02-12
Last reply:
2007-02-12
Bryce Harrington (bryce) said : #1

Hi Andrea,

'BUG:' indicates that this is a bug in the Linux kernel itself. Unfortunately, this particular error message could be caused by a variety of issues. Usually with BUGs there is additional details you can find with the command `dmesg` or by looking at the end of the file "/var/log/messages". You should see the BUG error, followed by a dump of memory registers and a backtrace. If you can get that information, then the kernel folk may be able to solve the issue.

Some ideas on workarounds: This BUG may be particular to just one version of the Linux kernel, so if you can upgrade or downgrade to a different version, that may resolve it. In googling around a bit, it sounds like people have run into this problem when having USB devices attached, when toggling wireless on or off, etc. so you could try that just to help narrow down the cause.

Next, the output from the following commands will be needed by kernel developers to troubleshoot it:

 `uname -a`
 `dmesg`
 `lsmod`

af (andrea-ferraris) said : #2

Sorry, I didn't make clear that the system is locked. I can't execute any of the command you suggested, only SysREQ is still working and the worst is that the problem seems to be the same with the standard installation kernel and with the new one (after the yesterday's upgrade - there was a digit subversion difference). The odd thing is that yesterday the system booted 3 times without trouble so I could install Ubuntu and reboot at least twice. It shown the problem only once.
I don't know how to upgrade the kernel without the system running. It is, I can substitue or add a new kernel under /boot and change the /boot/grub/menu.lst to start it at boot, but I don't know how and where find such kernel neither all the needed modules and initrd images.

I could change the network's parameters only starting with the Knoppix CD and then mounting the Ubuntu's root.

Thank for your help. Maybe I was wrong to post here and I have to post also to bugs.

regards,

Andrea

af (andrea-ferraris) said : #3

I'm a bit buggy. Before I didn't find , now I see that there are plenty of such report in bugs, related to my network adapter. I'm going to make some experiments.

Best af (andrea-ferraris) said : #4

Ok. It seems to be the ipw3945 module of my wireless network card.
I renamed it and now (for now) the machine is working.
The odd thing is that it wasn't enough to disable the network card by switch.