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Old 10-18-2005, 11:30 PM   #1
Registered: Oct 2004
Posts: 309

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kernel config and dmesg errors

i've recompiled my 2.6.10 kernel again and i'm getting some errors. i'd like some assistance in diagnosing and solving them.

Local APIC disabled by BIOS -- you can enable it with "lapic"
mapped APIC to ffffd000 (013f3000)
i enabled "Local APIC support on uniprocessors" in my config file. whats the deal?

2. the "Preemptible Kernel" option sounded really good, but when i enabled it, i got crazy errors at startup and i think a kernel panic. the help said it was good for desktops, i'm using a laptop, but is there any reason why this feature wouldnt work for me?

3. on startup, fsck runs and displays a big error about my hard drive's DMA being turned off. i wasn't getting this message before, using the same kernel, so I don't understand what i've done in the configuration to cause this. i've heard that it might have something to do with not compiling support for my ide chipset directly in to the kernel, but i dont know where in the config to do this. the only place ive seen stuff about dma or ide chipsets was under device drivers---> ATA/ATAPI/MFM/RLL support. i've tried compiling "Intel PIIXn chipsets support" into the kernel, because i have an intel chipset based on my lspci output:
IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller
Old 10-18-2005, 11:59 PM   #2
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1. You have to enable local APIC in the motherboard bios.

2. Preemptive multitasking must be supported by the programs running on the kernel. If not it causes runtime errors.

3. Standart IDE support must be enabled;

Old 10-19-2005, 12:30 PM   #3
Registered: Oct 2004
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ok, so does that apic message mean that the apic support that i've compiled into my kernel is not being used? should i try to enable apic in my bios or does it not really matter?

2. shouldnt the starndard linux programs that are run at startup support preemptible kernel? i'm not running anything wierd at startup, this is a fresh install of slackware 10.2

3. i've Generic PCI IDE Chipset Support" compiled into the kernel and i still get the error about dmesg at startup. am i in the right place? Device drivers---> ATA/ATAPI/MFM/RLL support---> PCI IDE chipset support.


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