Re: [gentoo-user] IOMMU and other oddities...

[meino.cramer@gmx.de]

pk <peterk2@coolmail.se> [11-08-09 13:11]:
> On 2011-08-09 07:32, meino.cramer@gmx.de wrote:
> 
> > Why does it look for an AGP-bridge???
> 
> Not that it helps but, I also have an AMD system (AM3+, FX990/SB950) and
> I get the "No AGP bridge found" message too...
> 
> > The dmesg says I should switch on IOMMU, which I did. But that does
> > not impress the kernel that much since it still recommends to switch
> > on IOMMU.
> > 
> > What did I wrong here ?
> 
> I can make the IOMMU message disappear in my system with a "bios" setting...
> 
> Two things that I can think of:
> 1. Check your bios to make sure it does enable the IOMMU (i.e. was the
> setting saved?).
> 2. Update your bios to see if it helps (but make sure you follow any
> instructions from the m/b manufacturer).
> 
> > I want to fix issues, which may be reported by dmesg, so:
> > Where can I find explanations to the dmesg output?
> 
> Don't know if there is such a place to "decode" the dmesg output but if
> you wish to know more about these particular messages (well the
> "terminology" and the technical explanation):
> https://secure.wikimedia.org/wikipedia/en/wiki/Iommu
> 
> https://secure.wikimedia.org/wikipedia/en/wiki/Aperture_%28computer_memory%29
> 
> Some more digging (but I'm not sure it would help you)...
> http://bogdan.org.ua/2009/09/30/iommu-this-costs-you-64-mb-of-ram.html
> 
> Best regards / MfG
> 
> Peter K
> 

Hi Peter,

 thanks for the links and your explanations! :)
 
 ...will see, what I can do...

 Keep hacking! ;)

 Best regards,
 mcc