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JohnBlbec
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Joined: 08 Feb 2003
Posts: 306

PostPosted: Sat Jan 09, 2010 5:30 pm    Post subject: parse DMAR table failure Reply with quote

hi everybody,

after upgrade from gentoo-sources 2.6.30-r5 to 2.6.31-r6 I can see following error :-(
(booted with param intel_iommu=off)

--- from dmesg begin ---
Code:

DMAR:Host address width 36
DMAR:DRHD base: 0x000000feb00000 flags: 0x0
------------[ cut here ]------------
WARNING: at drivers/pci/dmar.c:642 alloc_iommu+0x205/0x270()
Hardware name:         
Your BIOS is broken; DMAR reported at address feb00000 returns all ones!
BIOS vendor: Intel Corp.; Ver: BTX3810J.86A.2006.2009.1023.1057; Product Version:         
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.31-gentoo-r6 #1
Call Trace:
 [<ffffffff811ef5a5>] ? alloc_iommu+0x205/0x270
 [<ffffffff8103e5c8>] warn_slowpath_common+0x78/0xd0
 [<ffffffff8103e6a4>] warn_slowpath_fmt+0x64/0x70
 [<ffffffff81029bd0>] ? __ioremap_caller+0x1e0/0x370
 [<ffffffff811ef407>] ? alloc_iommu+0x67/0x270
 [<ffffffff81029e72>] ? ioremap_nocache+0x12/0x20
 [<ffffffff811ef5a5>] alloc_iommu+0x205/0x270
 [<ffffffff810b826d>] ? kmem_cache_alloc+0x7d/0xc0
 [<ffffffff814e971b>] dmar_table_init+0x1ea/0x3ad
 [<ffffffff814d3400>] ? pci_iommu_init+0x0/0x17
 [<ffffffff814ea643>] intel_iommu_init+0xc/0x3b7
 [<ffffffff814d3400>] ? pci_iommu_init+0x0/0x17
 [<ffffffff814d3409>] pci_iommu_init+0x9/0x17
 [<ffffffff81009047>] do_one_initcall+0x37/0x1a0
 [<ffffffff814ccf85>] kernel_init+0x182/0x1da
 [<ffffffff8100cdba>] child_rip+0xa/0x20
 [<ffffffff814cce03>] ? kernel_init+0x0/0x1da
 [<ffffffff8100cdb0>] ? child_rip+0x0/0x20
---[ end trace 4eaa2a86a8e2da22 ]---
DMAR:parse DMAR table failure.

--- from dmesg end ---

my usb webcam does not work now and sometimes my system freezes :-(

i have intel mb DX48BT2 with the new (fresh) bios BTX3810J.86A.2006.2009.1023.1057.
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