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Last reply by 06-26-2022 Unsolved
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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...

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Replies (14)
2 Bronze
2 Bronze

Same on Fedora:

[Thu Jan 28 10:04:39 2021] BIOS-provided physical RAM map:
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x0000000000000000-0x000000000009bfff] usable
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x000000000009c000-0x000000000009ffff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x0000000000100000-0x0000000047e8afff] usable
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x0000000047e8b000-0x00000000480aafff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x00000000480ab000-0x0000000048845fff] usable
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x0000000048846000-0x000000005084dfff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x000000005084e000-0x0000000068bfefff] usable
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x0000000068bff000-0x000000006ebfefff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x000000006ebff000-0x000000006f9fefff] ACPI NVS
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x000000006f9ff000-0x000000006fffefff] ACPI data
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x000000006ffff000-0x000000006fffffff] usable
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x0000000070000000-0x000000008fffffff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x00000000fd000000-0x00000000fe7fffff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x00000000fec80000-0x00000000fed00fff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x00000000fed40000-0x00000000fed44fff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
[Thu Jan 28 10:04:39 2021] BIOS-e820: [mem 0x0000000100000000-0x000000107fffffff] usable
[Thu Jan 28 10:04:39 2021] SMBIOS 3.2 present.
[Thu Jan 28 10:04:39 2021] DMI: Dell Inc. PowerEdge R740/00WGD1, BIOS 2.10.0 11/12/2020
[Thu Jan 28 10:04:39 2021] DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x000000006f8a0000-0x000000006f8a2fff], contact BIOS vendor for fixes
[Thu Jan 28 10:04:39 2021] DMAR: [Firmware Bug]: Your BIOS is broken; bad RMRR [0x000000006f8a0000-0x000000006f8a2fff]
BIOS vendor: Dell Inc.; Ver: 2.10.0; Product Version:
[Thu Jan 28 10:04:39 2021] DMAR-IR: x2apic is disabled because BIOS sets x2apic opt out bit.
[Thu Jan 28 10:04:39 2021] DMAR-IR: Use 'intremap=no_x2apic_optout' to override the BIOS setting.
[Thu Jan 28 10:04:40 2021] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:00: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:01: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:02: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:03: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:06: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:07: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:08: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:40 2021] acpi PNP0A08:09: FADT indicates ASPM is unsupported, using BIOS configuration
[Thu Jan 28 10:04:52 2021] ipmi_si dmi-ipmi-si.0: ipmi_platform: probing via SMBIOS
[Thu Jan 28 10:04:52 2021] ipmi_platform: ipmi_si: SMBIOS: io 0xca8 regsize 1 spacing 4 irq 10
[Thu Jan 28 10:04:52 2021] ipmi_si: Adding SMBIOS-specified kcs state machine
[Thu Jan 28 10:04:52 2021] ipmi_si dmi-ipmi-si.0: Removing SMBIOS-specified kcs state machine in favor of ACPI

Having a buggy experience is one thing. This is a normal thing to expect from proprietary blobs & drivers. But getting no response from the dev community toward this issue is another thing. This has some meaning. Meaning is, "Dell doesn't give a ....". Fill in the gap yourself. I'll be careful while choosing my future laptop.

No update from @Anonymous ?

Nope. Nothing. As you see: https://www.dell.com/support/home/en-us/product-support/product/inspiron-15-5548-laptop/drivers

There is no BIOS update. No bug fix update what so ever. I highly doubt they will do something to fix it. This community is dead silent AFAIK.

Any update from @DELL  ? I have the same problem.

No and no new BIOS yet either.

Bad luck!

Not bad luck, bad vendor, it is.

2 Bronze
2 Bronze

It's not just Dell.  I have a recently purchased Intel NUC6i7KYK Mini PC that came with Win10Pro installed.  I plugged it into the HDMI port on the monitor, re-partitioned hard drive to make room for Fedora 5-23-24 32. Windows runs fine, no problem.  Fedora runs fine most of the time but out of the blue, while I'm banging away on the keyboard, the screen goes black, unresponsive.  I can't even ping the machine from another host.  It's gone.  Curiously, the system has not failed while running as a server, i.e. I'm not at the keyboard.  Does it have something to do with the video driver?

.Sat Jul 17 02:42:54 PM PDT 2021
System stopped. I restarted and read the kernel buffer messages with dmesg
root@office2 ~]# dmesg
[ 0.085786] DMAR: RMRR base: 0x0000007a258000 end: 0x0000007a277fff
[ 0.085788] DMAR: RMRR base: 0x0000007b800000 end: 0x0000007fffffff
[ 0.085789] DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x000000007b800000-0x000000007fffffff], contact BIOS vendor for fixes
[ 0.085791] DMAR: [Firmware Bug]: Your BIOS is broken; bad RMRR [0x000000007b800000-0x000000007fffffff]
BIOS vendor: Intel Corp.; Ver: KYSKLi70.86A.0066.2019.1205.1748; Product Version: H90754-112

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