Ac 97 x64 driver

ICH6 is not only hard disk controller, but whole chipset specification. Forget the erroneous "6" that I added inadvertantly after "ICH". The only important thing here is that this is an unsupported device, and you cannot expect that it will work today or even less tomorrow.

The only thing to do is then to upgrade the emulation to a more recent version. But if this can work, it will make RealTek audio drivers certainly happier withit, with less unsupported workarounds for old hardware bugs. Yes I've googled all around to find a solution, and still I cannot find any one.

None of the solutions found do really apply to VirtualBox emulations, because all these solutions using various OEM drivers with various workarounds for the same problems are only meant to solve variably the same issues in a real hardware but not in the virtual emulation where they are not at all relevant and where they would finally cause more problems. And yes, sandervl73, I understand that your reply was a joke a form of disguised critic.

I don't want to criticize the way you are programming. But I REALLY cannot understand why you chose to emulate a completely unsupported hardware with known problems even if you had full documentations about it : these docs are certainly not describing enough details if they do not describe the workarounds that have been impelmented on top of them, because even this documentation was certainly bogous and not reflecting the reality as it was perceived in the old Windows drivers written for that bogous hardware device.

Even CPU processors have bugs, the situation is even worse with today's GPUs which are even more complex and where none of them are fully working fully as described in specs, or even wokeing the same way in the same production series, with some parts generating errors that need local corrections, or with parts failing quite rapidly because of heat or because of random defects in the chemical production process; chipsets are also very complex units as they work with so many different clock constraints, that need special autodetection algorithms to provide alternate working paths either in the software driver or in the mutable firmware embedded in the firmware.

Many fast devices are produced today, and then tweaked after production by running series of tests to disable some parts of the device. Many flat screens are sold with a few "acceptable" dead pixels for the same reason, otherwise the production would not suffice to the demand, and the devices would be much more expensive; Intel, AMD, and nVidia are doing the same with their CPU and GPU processors and chipsets, by recycling and downgrading them when they can't fully reach the expected zero-default level for which they were initially built: they fuse out some limitations permanently in them to avoid these defects that start being dramatic at the highest frequencies, or they fuse some power management capabilities.

These are just a few examples, but they don't always report this in the marketed product type, when they judge that the disabled feature is not essential for their market, or when they can provide workarounds around some common defects. Implementing a virtual HDA controller is likely the way for the VBox guys to go long term it's supposed on modern Windows and Linux versions without manufacturer-specific drivers but that's a non-trivial endeavor.

Adding an option for an AC97 controller that Windows 7 bit actually has a driver for that actually works might be a better short-term solution. Strange enough, my PC supports both AC97 and HDA it also supports some old games that just support the SB16 working mode , do you mean that it actually has two parallel devices?

It seems that for Windows, the WDM driver model does not really make a difference between them : as long as the OEM driver correctly exposes the capabilities, all these will still work fine the driver are supposed to implement what they claim to support, and Windows will attempt to fill the missing capabilities by using a software emulation, using the other exposed and supposedly working capabilities.

It almost certainly doesn't support both.. I think you're misunderstanding how the driver interface works - AC97 vs. HDA is a matter between the driver and the hardware, Windows doesn't care which interface it uses aside from what audio features the device claims to support. All hardware has bugs; the ones you listed don't seem that extraordinary. And keep in mind that we chose the ICH controller 4 to 5 years ago. HDA either wasn't there back then or rather unsupported.

Also note that one important goal of virtualization is to provide a means to run legacy software. That means it really isn't wise to choose to emulate only modern hardware. How VMware Workstation solved this problem? Small explanation: The driver installed fine, and it appears in Windows 7, and media player in guest "sees" an audio device, but host doesn't produce any sound. Anyway, this still does not explain why the SB16 emulation offered in VirtualBox does not work either.

And when you'll add a HDA virtual emulation, you'll have a fourth audio source to mix. By default, all these virtual devices could be enabled and made visible to the guest OS, so the guest OS can use whatever device it supports, and users will hear sound.

And they'ell be also able to uninstall the "physical" devices from their guest OS by turning off the emulation when unchecking the associated emulations offered by VBOX in its configuration panel. HDA is a matter between the driver and the hardware". This is definitely not what I see in the BIOS settings of one of my PCs where both configurations are possible, so the hardware must certainly support both working modes.

I did not say that this was the same driver to use in Windows. And you can still install a secondary hardware audio board in any PC, if you wish, without having to disable the primary audio device for Windows it does not matter if they use different working modes, it can perfectly handle several audio devices , just like you can also install a secondary display device, or a secondary keyboard, or a secondary disk controler, or a secondary USB host controler many PCs today include several USB host controlers, or use a controler working in "dual" mode with one virtually connected to the other.

Correction: The driver work in most situations, but there are problems when too many VMs trying to use sound. I have no idea why they take 80 MB I hope they can be slimmed down significantly. Vista bit comes with AC97 driver pre-installed. As far as a device supporting both HDA and AC97, if that's indeed the case, it's either two PCI functions logical devices supported by one device, or two separate devices entirely.

It remains that AC97 and HDA are not compatible at all, they use entirely separate drivers and implement entirely different interfaces. Technologov: Given that the Realtek drivers seem to work poorly or not at all for many users I don't think it makes any sense for VBox guys to add them to guest additions when people that really want to try them can install them themselves..

So the reason is somewhere else, and the response about missing bit support is not relevant. Are the emulated device registers returning the correct flags? Are these registers honoring the correct distinctions between read and write accesses? Are read-write access to registers effectively altering the contents of other related registers?

When a register is used to index and remap other registers in the allocated IO space for example to map audio data buffers in the small IO space before writing to them , is this setting remembered?

Do you support all the needed register access orders used by drivers? Are their reported values updated timely and in order notably status registers, and pending IRQs once they have been handled in the guest OS, in order to allow freeing buffers in the audio queue? What happens if the guest OS itself uses its own local virtualization notably for memory-mapped device registers? Are you correctly describing the ressources to the guest and honoring the PCI allocations requested by the guest according to the PCI capabilities that were given?

Are you supporting power management states described in the ICH specifications for powering on the device only when it starts being used , or do you assume that these virtual devices will be always on and that the guest's driver will not verify it? This is what Microsoft apparently did in VirtualPC and it works very well.

Please take this discussion to the forum. I've asked this before and will delete unrelated comments in the future. Why did you need to restrict this bug to Win64 guest when closing it? The same defect also occurs on Win32 host running a Win32 guest, as well as on Win64 host running a Win32 guest.

I don't think this is specific to the guest even if sound works on the same machine using the same version of VBOX installed on the same host OS, to run a bit or bit Linux guest: the difference is only in the subset of the device capabilities used by the guest's driver , but lies somewhere in the host part, i.

I don't think there's any problems with the device emulating what it claims to be. The problem is purely that there is no driver that works properly with this device for bit Windows, so it's entirely a guest issue. Everywhere above, I spoke about Win32, you've not read it. Really the bug or limitation is not limited to Win64, and I really think it is on the host, not on the guest even if there's no more supported device for it, all alternate drivers FOR WIN32 do not work: they fail to detect the hardware, these drivers simply don't run as they fail in their detection or after the first test where the sound is played only once , then never stops, even if the PCI resources are presented to the guest OS and correctly enumerated and allocated and if there are matching PnP IDs.

This can only be explained by a bug in the device emulation on the host. And exactly the same VM image containing an installation of either Vista bit or Windows Seven bit works sucessfully and can play sounds if using that VM image in VirtualPC which does not use this virtual device but its own different virtual device, visible with its own PnP ID and its own addional guest driver specific to VirtualPC's emulated sound device.

The sound also works in a bit installation of Linux in the VM image which works without change, from within VirtualBox or within VirtualPC and on the same hardware machine. This can only be explained by differences in the emulation layer of the host, not on the guests as they are strictly identical.

Make sure you follow the instructions on ticket very closely. Does not work at all it just worked once, when playing the first sound, then never again, without even changing any setting.

Windows must have disabled it due to failure, such as loss of an expected event, or the driver itself tweaked itself its own internal settings in the registry. Anyway, I've converted all my PCs now to Windows 7 host. And I still don't have any sound in a Windows 7 guest 32bit or 64bit , or Windows XP guest 32bit only , or Windows Vista guest 32 bit or 64bit ; I only get sound in a Linux guest. I can't try with Virtual PC now, because it is not supported on Windows 7.

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