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Un-allowed DMA capable bus/device(s) detected RRS feed

  • Question

  • Hello

    My problem is how can I find out which device on my laptop is  Un-allowed DMA capable. I tried disabling my USB devices and unplugging laptop from docking station. My colleague has same laptop model and he is not having same issue as I do.

    System Information 

    OS Name Microsoft Windows 10 Enterprise
    Version 10.0.16299 Build 16299
    Other OS Description Not Available
    OS Manufacturer Microsoft Corporation
    System Name NB-SOKRE
    System Manufacturer LENOVO
    System Model 20L7S02M00
    System Type x64-based PC
    System SKU LENOVO_MT_20L7_BU_Think_FM_ThinkPad T480s
    Processor Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz, 2112 Mhz, 4 Core(s), 8 Logical Processor(s)
    BIOS Version/Date LENOVO N22ET37W (1.14 ), 22.5.2018.
    SMBIOS Version 3.0
    Embedded Controller Version 1.08
    BIOS Mode UEFI
    BaseBoard Manufacturer LENOVO
    BaseBoard Model Not Available
    BaseBoard Name Base Board
    Platform Role Mobile
    Secure Boot State On
    PCR7 Configuration Bound
    Windows Directory C:\Windows
    System Directory C:\Windows\system32
    Boot Device \Device\HarddiskVolume1
    Locale United States
    Hardware Abstraction Layer Version = "10.0.16299.371"
    User Name 3PRO\kkljucaric
    Time Zone Central European Daylight Time
    Installed Physical Memory (RAM) 16,0 GB
    Total Physical Memory 15,8 GB
    Available Physical Memory 7,02 GB
    Total Virtual Memory 18,2 GB
    Available Virtual Memory 5,31 GB
    Page File Space 2,38 GB
    Page File C:\pagefile.sys
    Virtualization-based security Running
    Virtualization-based security Required Security Properties Base Virtualization Support, Secure Boot, DMA Protection
    Virtualization-based security Available Security Properties Base Virtualization Support, Secure Boot, DMA Protection, Secure Memory Overwrite, UEFI Code Readonly, SMM Security Mitigations 1.0
    Virtualization-based security Services Configured Credential Guard
    Virtualization-based security Services Running Credential Guard
    Windows Defender Device Guard Code Integrity Policy Audit
    Windows Defender Device Guard user mode Code Integrity Audit
    Device Encryption Support Reasons for failed automatic device encryption: Un-allowed DMA capable bus/device(s) detected
    A hypervisor has been detected. Features required for Hyper-V will not be displayed. 

    Tuesday, July 17, 2018 1:45 PM

All replies

  • Look at the identification number of the device. 

    You can see that in the device manager > right click on this device > properties > details > and you will have something like PCI\VEN or USB\VEN

    When you have this number, let's do a google search and you will find which device is linked to this number.

    I guess that you have a missing driver or something like that .. :)

    Tuesday, July 17, 2018 1:48 PM
  • Still no change with this issue after updating drivers from Device Manager.

    Friday, August 3, 2018 12:20 PM
  • Hi there,

    Could you check out the identification number and share it with us ?

    Thursday, August 9, 2018 7:44 AM
  • In regstriy key editor under unallowed DMA devices i have listed Pci Bus (HD ID: ACPI\VEN_PNP&DEV_0A08) and

    Thunderbolt(TM) Controller(HD ID (PCI\VEN_8086&DEV_15BF&SUBSYS_11112222&REV_01). I have updated them and still no change.


     
    Friday, August 31, 2018 2:39 PM
  • List of uninstalled USB devices in device manager

    USB\VID_04F2&PID_B614&REV_0012

    USB\ROOT_HUB30&VID8086&PID15C1&REV0001

    USB\VID_04F2&PID_B615&REV_0011
    USB\ROOT_HUB30&VID8086&PID9D2F&REV0021
    ACPI\VEN_USB&DEV_C000
    PCI\VEN_8086&DEV_9D2F&SUBSYS_225817AA&REV_21
    PCI\VEN_8086&DEV_15C1&SUBSYS_11112222&REV_01

    Tuesday, September 4, 2018 9:48 AM
  • What about creating registry key with their Hardware ID as value under Unallowed buses for example for "Pci BUS" which i found in Device Manager and ThunderBolt also was in Device Manager and under Unallowed buses? 

    List of uninstalled USB devices in device manager

    USB\VID_04F2&PID_B614&REV_0012

    USB\ROOT_HUB30&VID8086&PID15C1&REV0001

    USB\VID_04F2&PID_B615&REV_0011
    USB\ROOT_HUB30&VID8086&PID9D2F&REV0021
    ACPI\VEN_USB&DEV_C000
    PCI\VEN_8086&DEV_9D2F&SUBSYS_225817AA&REV_21
    PCI\VEN_8086&DEV_15C1&SUBSYS_11112222&REV_01

    In regstriy key editor under unallowed DMA devices i have listed Pci Bus (HD ID: ACPI\VEN_PNP&DEV_0A08) and

    Thunderbolt(TM) Controller(HD ID (PCI\VEN_8086&DEV_15BF&SUBSYS_11112222&REV_01). I have updated them and still no ch

    Tuesday, September 11, 2018 12:37 PM
  • Sorry i meant adding them in regedit as allowed devices.What is your opinion about it?
    Wednesday, September 12, 2018 9:06 AM