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device: 0.784
semantic: 0.580
socket: 0.500
mistranslation: 0.492
kernel: 0.488
ppc: 0.473
i386: 0.434
network: 0.411
architecture: 0.404
x86: 0.402
risc-v: 0.376
register: 0.369
vnc: 0.364
PID: 0.363
arm: 0.362
boot: 0.349
hypervisor: 0.344
peripherals: 0.316
graphic: 0.310
performance: 0.306
permissions: 0.302
VMM: 0.296
TCG: 0.293
user-level: 0.288
KVM: 0.270
debug: 0.255
files: 0.234
virtual: 0.188
assembly: 0.134
Please support "-soundhw none"
qemu currently provides a default set of sound hardware. The -soundhw option can change that default set, such as by using "-soundhw pcspkr" to disable most of it, but no "-soundhw none" option exists to disable all of it. As far as I can tell, disabling the default sound hardware requires specifying -nodefaults and then manually specifying all the desired hardware, leaving out sound hardware.
Please consider adding support for "-soundhw none", to disable all the default sound hardware.
Actually, QEMU doesn't provide a default set of sound hardware.
The pcspk device provides port 0x61 and like most other legacy ISA devices is not removed by -nodefaults (i8254 PIT, i8257 DMA, i8259 PIC; only the serial port can be removed).
However, unless you configure it specifically with "-soundhw pcspk", the pcspk device does not emit any audio and is little more than an bolted-on piece of the PIT device model. You can check it yourself by placing a breakpoint on pcspk_audio_init and pcspk_realizefn. With -nodefaults, the latter does run, just like with no command line option, but pcspk_audio_init is not called. With -soundhw pcspk, both are called.
It looks like qemu without any specific -soundhw CLI option uses pulseaudio.
So I still think a -soundhw none would be nice to have.
Pulseaudio is a sound *backend*. This is independent of the choice of guest hardware frontend.
You can disable pulseaudio using an env variable QEMU_AUDIO_DRV=none
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