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Dazed and confused - unknown system restart


I've got some bizzare & annoying problem in some of our servers.All other servers dont have this unknown restart issue. Only the PPPoEservers restart. When it restarts, it shows this message:

"kernel: Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?"

I did searches on google, didn't find anything regarding this issue,but i found few similar searches; there were unknown solutions forthis. Some showed that it was something to do with the RAM, but ichecked that, it doesn't have anything to do with it.

The pppoe servers are "IBM eserver xSeries 336"

The specifications of these servers:

CPU: 1 x86_64 3.0Ghz processors (Cache: 1024 KB) Intel Xeon

Network: (2X) Broadcom Corporation NetXtreme BCM5704 Gigabit Ethernet PCI

Network: (2x) Broadcom Corporation:NetXtreme BCM5721 Gigabit Ethernet

SCSI: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320



Graphic Card: ATI Technologis Inc Radeon RV100 QY (Radeon 7000/VE)

USB: (2x) Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller

Storage Device: (2x) Intel Corporation 82801EB (ICH5) SATA Controller (each 36.4)


the kernel version of Fedora Core 4:
linux version 2.6.15-1.1833_FC4smp( (gcc version 4.0.2 20051125 (RedHat 4.0.2-8) ) #1 SMP Wed Mar 1 23:56:51 EST 2006

Well thanks, hope there is a quick solution for this.


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  • Uri Steinberger Feb 02, 2008

    thanks for helping, I'll try that soon, and see if that works. I'll give you a reply if that works.

    Thanks again for the help!

  • Uri Steinberger Feb 04, 2008

    Hey daverh,

    I looked thoroughly for power management options, ACPI and power saving on the BIOS, and there is no option for this.
    I remember there is power saving mode in the O.S., but is that going to help if its disabled on the O.S.
    If i should disable it on the Fedora Core 4, what are the steps to disable it.


  • Uri Steinberger Feb 05, 2008

    the first time i came about this unknown restart, I though maybe if i update it, it will fix the restart issue, i updated the BIOS a couple of times which didn't solve the problem.
    Well the strange thing about this that when i changed one of the PPPoE servers recently to a different type of server by just exchanging both hard drives with 2 hard drives that already got all the setup, O.S, programs installed. and just 2 network interfaces linked. 2 other interfaces not linked - system never restarts. this server is for hotspot page and prepaid services and has its own database which is ok but not so stable and thats y we are using also PPPoE servers. I regularly check the logs and no restarts. It's same hardware as the other PPPoE server but just different services running with the same Fedora Core 4. Now i have a feeling maybe the O.S has problems with 4 network interfaces running at the same time or it can be something in the PPPoE scripts running. Well the configurations of these servers i didn't made them. The configurations was done by a team that came here and did all these. All the other servers from the PPPoE servers don't have this restart issue and the others all have 1 or 2 network interfaces linked. I can't take none of the other network interfaces off because all the 4 network interfaces linked are running each for a purpose. 1 is the External (backbone internet), Internal (SNMP and RADIUS(Database Authentication)) DMZ (IIS linked & Mail) and 4th is Wifi (linked to wifi transmitters). The team left has a quick sketch of the services, network, and firewall configurations. I can go into each of the servers and find out exactly what scripts are in, but its hustle to understand these scripts lol.

    thanks for your time and help.
    The ASU sounds good, i will look for it and see if i can view power saving mode and ACPI options.




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First off, take the message at its word: restart the machine, go into the BIOS and disable all power saving. Also, turn off ACPI if it's on.

Posted on Feb 02, 2008

  • Dave Harris
    Dave Harris Feb 04, 2008

    I don't know offhand where you'd change ACPI etc settings in Fedora - I usually use SuSE or Ubuntu & in any case haven't had to do it for years :). However, I don't think that would help you - the OS seems to be recovering from some odd interruption initiated by the hardware. The baseboard management processor on those machines can do that if they detect various types of error - if you go to the IBM site you can download manuals on this.

    If you go here:
    you can download the Advanced Settings Utility (ASU), both the manual & the software. This allows you to see all the BIOS settings as a list - and may well show you some that don't appear when you go into the BIOS directly. There are versions of the program that will run from the command line under Linux with the system running normally. Of course, there is the possibility that you really do have an intermittent hardware fault :{ For example, a partially clogged CPU heatsink could cause a restart through overtemperature when the CPU was being worked hard for a while.

    Diagnostics: have a look around here:

    And a last thought - have you checked for BIOS updates?



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