Alright, let's try to figure out the category for this bug report. The user mentioned issues with audio not working on both Windows and Linux guests when using soundhw="ac97". So, first off, they're using QEMU, specifically KVM or Xen hypervisors. The error message says "audio: Could no init 'oss' audio driver." That points to an issue with the audio driver initialization. The guest detects the audio device but can't produce sound. Looking at the possible categories: mistranslation, assembly, other, device, graphic, socket, network, KVM, etc. Since it's about the audio functionality not working, it seems related to a specific hardware device, in this case, the AC97 audio. In QEMU/KVM, soundhw=ac97 refers to emulating an AC97 sound card. If the driver isn't initializing correctly, it might be a problem with how the hardware is being exposed to the guest or perhaps a bug in the emulation itself. The categories provided don't have a direct 'audio' category, but 'device' seems appropriate because it's about a specific hardware device not functioning as expected. Alternatively, since KVM is involved, 'KVM' could be a consideration, but the issue is more about the device (audio) rather than the hypervisor itself. So, I'm leaning towards 'device' as the category because it's related to the audio hardware emulation in QEMU. device