IOMMU issue

[Stephen Davies]

I think that the easy way out is to buy a new box.
This one seems just too old:-(

Cheers,
Stephen

On Tuesday, February 18, 2014 12:37:56 AM Max wrote:
> On 02/17/2014 09:05 PM, Stephen Davies wrote:
> > I have just used fedup to upgrade from FC17 to FC18.
> > 
> > When I reboot into fedup, the screen is unreadable in graphics mode so
> > I changed the grub configuration to use console.
> > 
> > Now booting to fedup gives:
> > 
> > dmar:IOMMU: failed to map dmar0
> > 
> > and hangs/crashes/freezes.
> > 
> > If I reboot to FC17, the system is perfectly usable but dmesg tells me:
> > 
> > [ 0.000000] Kernel command line:
> > BOOT_IMAGE=/vmlinuz-3.3.4-5.fc17.x86_64
> > root=/dev/mapper/vg_mustang-lv_root ro rd.md=0 rd.dm=0 SYSFONT=True
> > KEYTABLE=us rd.lvm.lv=vg_mustang/lv_swap rd.lvm.lv=vg_mustang/lv_root
> > rd.luks=0 LANG=en_US.UTF-8 rhgb quiet
> > 
> > [ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
> > 
> > [ 0.000000] Checking aperture...
> > 
> > [ 0.000000] No AGP bridge found
> > 
> > [ 0.000000] ------------[ cut here ]------------
> > 
> > [ 0.000000] WARNING: at drivers/iommu/dmar.c:492
> > warn_invalid_dmar+0x92/0xa0()
> > 
> > [ 0.000000] Hardware name: S3210SH
> > 
> > [ 0.000000] Your BIOS is broken; DMAR reported at address feb00000
> > returns all ones!
> 
> Is there a BIOS update available ? I would guess that changes in the
> kernel between F17 and F18 are not playing well with your motherboard's
> BIOS.
> 
> It could be related to your video card since your getting graphical
> distortion. Is this embedded graphics(onboard) or an add in graphics
> card? If you have an add-in video card and there is an integrated video
> chipset, have you tried removing the add-in card and working with the
> onboard video ?
> 
> I would check to see if there is a BIOS update available.  I am
> unfamiliar with fedup so maybe none of the above matters. Have you tried
> anything else besides adding iommu=off ?
-- 
=============================================================================
Stephen Davies Consulting P/L                           Phone: 08-8177 1595
Adelaide, South Australia.                                Mobile:040 304 0583
Records & Collections Management.
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