Linux Developer Systems

Last reply by 06-26-2022 Unsolved
Start a Discussion
2 Bronze
2 Bronze

DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x000000009d800000-0x000000009fffffff]

sudo dmesg

<>

[ 0.000000] APIC: Switch to symmetric I/O mode setup
[ 0.000000] DMAR: Host address width 39
[ 0.000000] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
[ 0.000000] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap 1c0000c40660462 ecap 7e1ff0505e
[ 0.000000] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
[ 0.000000] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap d2008c20660462 ecap f010da
[ 0.000000] DMAR: RMRR base: 0x0000009ce65000 end: 0x0000009ce84fff
[ 0.000000] DMAR: RMRR base: 0x0000009d800000 end: 0x0000009fffffff
[ 0.000000] DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x000000009d800000-0x000000009fffffff], contact BIOS vendor for fixes
[ 0.000000] DMAR: [Firmware Bug]: Your BIOS is broken; bad RMRR [0x000000009d800000-0x000000009fffffff]
BIOS vendor: Dell Inc.; Ver: A10; Product Version: A10
[ 0.000000] DMAR: ANDD device: 1 name: \_SB.PCI0.SDMA
[ 0.000000] DMAR-IR: IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1
[ 0.000000] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
[ 0.000000] DMAR-IR: x2apic is disabled because BIOS sets x2apic opt out bit.
[ 0.000000] DMAR-IR: Use 'intremap=no_x2apic_optout' to override the BIOS setting.
[ 0.000000] DMAR-IR: Enabled IRQ remapping in xapic mode
[ 0.000000] x2apic: IRQ remapping doesn't support X2APIC mode
[ 0.000000] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1

</>

Distro: Ubuntu 20.10
Device: Dell Inspiron 5548

Looks like there is a problem is BIOS firmware that needs to be addressed.

A bug fix update would be nice...

Labels (1)
Replies (14)

That's interesting to know. But this doesn't mean Dell Developers can't do anything about this issue by making changes in their BIOS. Does it?!

2 Bronze
2 Bronze

I just updated my BIOS to 2.12.02 and still see this issue >>> 

 

Nov 23 14:50:50 localhost kernel: DMAR: RMRR base: 0x0000005f234000 end: 0x0000006723bfff
Nov 23 14:50:50 localhost kernel: DMAR: RMRR base: 0x00000068af9000 end: 0x00000068ff8fff
Nov 23 14:50:50 localhost kernel: DMAR: RMRR base: 0x0000006e960000 end: 0x0000006e962fff
Nov 23 14:50:50 localhost kernel: DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x000000006e960000-0x000000006e962ff
f], contact BIOS vendor for fixes
Nov 23 14:50:50 localhost kernel: DMAR: [Firmware Bug]: Your BIOS is broken; bad RMRR [0x000000006e960000-0x000000006e962fff]#012BIOS vendor:
; Ver: 2.2.11; Product Version:
Nov 23 14:50:50 localhost kernel: DMAR: ATSR flags: 0x0
Nov 23 14:50:50 localhost kernel: DMAR: ATSR flags: 0x0
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 12 under DRHD base 0xc5ffc000 IOMMU 6
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 11 under DRHD base 0xb87fc000 IOMMU 5
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 10 under DRHD base 0xaaffc000 IOMMU 4
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 18 under DRHD base 0xfbffc000 IOMMU 3
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 17 under DRHD base 0xee7fc000 IOMMU 2
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 16 under DRHD base 0xe0ffc000 IOMMU 1
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 15 under DRHD base 0xd37fc000 IOMMU 0
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 8 under DRHD base 0x9d7fc000 IOMMU 7
Nov 23 14:50:50 localhost kernel: DMAR-IR: IOAPIC id 9 under DRHD base 0x9d7fc000 IOMMU 7
Nov 23 14:50:50 localhost kernel: DMAR-IR: HPET id 0 under DRHD base 0x9d7fc000

2 Bronze
2 Bronze

The Dell Inspiron 15 Gaming actually needs this to be mapped correctly for Optimus, otherwise the Nvidia driver and who knows what else will fail to write. It also causes problems with XHCI because DMA is pretty much busted.

Attempts to use SG tables just result in instant death of my machine, from my recent testing.

It took me years to figure out why my this one was locking up all the time.

It's not fatal on Windows, but the Intel GPU resets often. I can't pretend to fully understand DMA-BUF, but this is increasingly becoming relevant.

2 Bronze
2 Bronze

Have same problem with my Dell Inspiron 5559 after installing Ubuntu 22.04 Desktop

me too, but I was installing Ubuntu 22.04 on my laptop Asus A456UA

Top Contributor
Latest Solutions