NEC Express5800 GT110bにCentOS6を導入．
色々とテスト．

・haltしてもリブートしちゃう．
→Wake On LANを切ればいいらしいが，どうせ電源入れっぱなしで落とすことは無いしどっちでもいいやー

・Your BIOS is brokenとか言われる
→起動時に intel_iommu=off をつけると回避できるっぽい．Intel VTとIO関連か．
しかしこれも特に実害はないような？（仮想化使ってないし）

Subject: [abrt] full crash report

Duplicate check
=====

Common information
=====
package
—–
kernel

architecture
—–
x86_64

kernel
—–
2.6.32-220.2.1.el6.x86_64

Additional information
=====
kernel_tainted_long
—–
Working around severe firmware bug.

kernel_tainted
—–
2048

time
—–
1326922027

component
—–
kernel

backtrace
—–
WARNING: at drivers/pci/dmar.c:594 warn_invalid_dmar+0x7a/0x90() (Tainted: G I—————- )
Hardware name: Express5800/GT110b [N8100-1592Y]
[Firmware Warn]: Your BIOS is broken; DMAR reported at address fe711000 returns all ones!
BIOS vendor: Phoenix Technologies LTD; Ver: 1.0.4109; Product Version: FR2.2
Modules linked in:
Pid: 1, comm: swapper Tainted: G I—————- 2.6.32-220.2.1.el6.x86_64 #1
Call Trace:
[] ? warn_slowpath_common+0x87/0xc0
[] ? warn_slowpath_fmt_taint+0x3f/0x50
[] ? __ioremap_caller+0x2a8/0x390
[] ? warn_invalid_dmar+0x7a/0x90
[] ? alloc_iommu+0x203/0x2b0
[] ? dmar_table_init+0x1bd/0x3be
[] ? enable_IR_x2apic+0x23/0x221
[] ? native_smp_prepare_cpus+0x143/0x389
[] ? kernel_init+0x112/0x2f9
[] ? child_rip+0xa/0x20
[] ? kernel_init+0x0/0x2f9
[] ? child_rip+0x0/0x20

（以下省略）

■akr’s log: Your BIOS is broken
■Your BIOS is broken とかいわれていた件 – Ghosthacks