Re: So, my HP Bios is broken?

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On 01/18/2011 08:46 PM, Genes MailLists wrote:
> On 01/18/2011 03:37 PM, Alessandro Boggiano wrote:
>> I was looking into /var/log/messages and I discoverd this! :(
>>
>> I went on HP site and I found indeed a bios upgrade, but it reports:
>> Fix/Enhancement: Updates the Computrace Option ROM to verison 889.
>>
> 
>  ...
> 
>> Jan 18 20:26:46 localhost kernel: [    0.000000] Disabling lock
>> debugging due to kernel taint
> 
>   May be unrelated - but what is tainting your kernel ? You have nvidia
> drivers instead of nouveau maybe ?
> 
> 

This _is_ what's tainting the kernel. If you read back earlier in the log:

Jan 18 20:26:46 localhost kernel: [    0.000000] Pid: 0, comm: swapper
Not tainted 2.6.35.10-74.fc14.i686.PAE #1

So the kernel's not tainted here but later on we get:

Jan 18 20:26:46 localhost kernel: [    0.000000] Disabling lock
debugging due to kernel taint

This is because the routine that handles the invalid DMAR address uses
WARN_TAINT_ONCE to report the problem:

static void warn_invalid_dmar(u64 addr, const char *message)
{
        WARN_TAINT_ONCE(
                1, TAINT_FIRMWARE_WORKAROUND,
                "Your BIOS is broken; DMAR reported at address %llx%s!\n"
                "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
                addr, message,
                dmi_get_system_info(DMI_BIOS_VENDOR),
                dmi_get_system_info(DMI_BIOS_VERSION),
                dmi_get_system_info(DMI_PRODUCT_VERSION));
}

Regards,
Bryn.
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