Re: [SLE] Higher CPU ext. freq setting causes kernel panic

From: Rikard Johnels (rikjoh_at_norweb.se)
Date: 06/10/04

  • Next message: Ken Schneider: "Re: [SLE] Using APT with SuSE 9.1" 
    To: suse-linux-e@suse.com
Date: Thu, 10 Jun 2004 17:00:23 +0200

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    On Thursday 10 June 2004 07.45, Dale Mirenda wrote:
    > SuSE 9.1, kernel 2.6.x
    > Asus A7N8X mboard (BIOS 1007; latest)
    > Athlon XP 3200 Barton
    > Corsair Twin-X 512x2 RAM
    >
    > OS boots normally if CPU ext. Freq setting in bios is set to 100 Mhz,
    > but CPU at boot is reported as Athlon XP 1100MHz , and system runs slow
    > (but stable).
    > Changing the setting to 200 MHz, CPU at boot is reported as Athlon XP
    > 3200+ but the OS always hangs before completing bootup, with "kernel
    > panic: VFS: Unable to mount root fs on unknown-block(8,5)."
    >
    > Did a lot of net searches for this problem, have seen fixes related to
    > memory (mem=1024k) and grub (root=/dev/hdxx) but nothing relating to
    > the CPU frequency. I don't understand why the kernel would react this
    > way to a faster CPU.
    >
    > If this is a known prob, can someone point me to a FAQ? If not, any
    > ideas on where I should go to resolve it?
    >
    > I've tried booting from SuSE install cd. The boot hangs at different
    > points depending on which boot option I try, but it always hangs.
    >
    > TIA for your assistance.
    >
    > Dale

    Sounds to me like your MB isnt fast enough for 200 MHz.
    Something along the IDE controller line is failing at those speeds.
    Could be RAM, could be Chipset, could be busspeed anomalities..
    Try stepping up from 100 in smaller steps.
    Run under heavy load for extended time to check stability.

    - --

             /Rikard

    - ------------------------------------------------------------------------------------
    Rikard Johnels email : rikjoh@norweb.se
                            Web : http://www.rikjoh.com
                            Mob : +46 (0)735 05 51 01

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