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  1. Core ReactOS
  2. CORE-14617

HDA_FDOQueryBusRelations fails when loading hd audio

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Fix Version/s: 0.4.12
    • Component/s: None
    • Labels:
      None

      Description

      Recently bought notebook HP 245 G6, as there is no optical drive, 1st and 2nd stage were performed from Qemu VM using a linux live usb, so ReactOS could be installed at hard disk.

      3rd stage (first boot) starts well, showing some new hardware wizards for new devices (mostly ACPI controllers), but when the system loads the multimedia devices, it break the debugger and shows a prompt.

      Doing a backtrace the Eip points to HDAudBus.sys (drivers/wdm/audio/hdaudbus/fdo.cpp:674) (HDA_FDOQueryBusRelations)

      The line 674 is

       672         for (AFGIndex = 0; AFGIndex < Codec->AudioGroupCount; AFGIndex++)
       673         {
       *674             DeviceRelations->Objects[DeviceRelations->Count] = Codec->AudioGroups[AFGIndex]->ChildPDO;*
       675             ObReferenceObject(Codec->AudioGroups[AFGIndex]->ChildPDO);
       676             DeviceRelations->Count++;
       677         }

      Update
      I think found the bug
      On debug log says:

      (drivers/wdm/audio/hdaudbus/fdo.cpp:214) hda Codec 0 Vendor:8094 ... NodeStart 255 NodeCount 255

      this is key to find the bug, in the file there is a loop 2 lines below:

        216     for (NodeId = Response.start; NodeId < Response.start + Response.count; NodeId++) {

      then there are 2 DPRINTs that repeats a lot of times

      (drivers/wdm/audio/hdaudbus/fdo.cpp:222) NodeId 255 GroupType 1
      (drivers/wdm/audio/hdaudbus/fdo.cpp:238) NodeId ff found ab audio function group!

      and so on 254 times!
      looking after at dmesg, I found that the loop stops at 509 and then breaks the debugger, maybe these are the clues to find the guilty line!

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              • Assignee:
                ThFabba ThFabba
                Reporter:
                Julcar Julcar
              • Votes:
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                Dates

                • Created:
                  Updated:
                  Resolved: