[Bug 1873344] Re: KVM Windows 98 sound card passthrough is not working for DOS programs..

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/73


** Changed in: qemu
       Status: New => Expired

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #73
   https://gitlab.com/qemu-project/qemu/-/issues/73

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https://bugs.launchpad.net/bugs/1873344

Title:
  KVM Windows 98 sound card passthrough is not working for DOS
  programs..

Status in QEMU:
  Expired

Bug description:
  Hello,
  im trying to passthrough PCI soundcards into Qemu Windows 98 machine - i 
tried Yamaha 724/744 and Aunreal Vortex 1, for Windows 98 its working fine, but 
for Windows 98 dosbox mode its at the best half - working - FM (music) only or 
nothing with detected by games sound setups.
    All there cards are using SB emulation devices. 

    When i try to boot to pure DOS, without Windows 98, even music is not 
working with pass through, only sound which i was able to heard its form Yamaha 
Setup utility test - Native 16bit sound, aby other test, games setup etc.. are 
able to dettect sound cards at all. 
    Im pretty sure that drivers are setup correctly, because im using same 
setup on other physical machine, when its working. My suspect is missing or 
broken Qemu MB DMA channels emulation.. Because its is need to make DOS sound 
working.

    Im using pass through because, SB16 emulation in Qemu is incomplete
  and for Windows 98 dos box, problem is same as with physical cards.
  Same with AC97 emulation and its Win95 drivers, which have SB
  emulation device fallback..

  Qemu 2.11 + 4.2 Linux Mint 19.3. MB Gigabyte Z170.

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