[CentOS] Warning: Your BIOS is broken

[Robert Moskowitz]

On 02/22/2013 02:32 PM, Reindl Harald wrote:
>
> Am 22.02.2013 20:28, schrieb Robert Moskowitz:
>>> on a similar/identical bug with Fedora FC17, someone suggested booting
>>> with iommu=off to work around this.
>> Where do I add this?
> like every other kernel param in /boot/grub/grub.conf at
> the end of the kernel line

Kernel param.  I really should have caught that.

So I was all ready to edit grub.conf and then slapped my hand.  You TEST 
it out first, adding the command at boot time.  ARGH!  Once before (5+ 
years back) I had to add a kernel param and did it wrong and it was a 
big recovery challenge.  No test and verify before making permanent.  Whew.

So I googled the param to get its format right, and it is iommu=off. 
Without that dash in front.  But as I read up on this option, it does 
not sound like something I want to globally turn off just to stop a 
supposedly annoying message (if they have indeed worked around it, and 
my new DNS server is running with this OK).

So I will test from booting and typing the option in without actually 
altering grub.conf.  But if there is a way to just stop getting this 
message, that would be good too.

thank you all for your help.

>
> https://www.google.com/search?q=linux+add+kernel+params
> http://www.kernel.org/doc/Documentation/kernel-parameters.txt
>