On 22/02/2019 21:18, Pierre Labastie via blfs-dev wrote:
> On 22/02/2019 20:43, Douglas R. Reno via blfs-dev wrote:
>>
>> On 2/22/19 1:19 PM, Bruce Dubbs via blfs-dev wrote:
>>> On 2/22/19 1:04 PM, Douglas R. Reno via blfs-dev wrote:
>>>>
>>>> On 2/22/19 12:21 PM, Bruce Dubbs via blfs-dev wrote:
>>>>> There has been some problem with ALSA getting their download site working
>>>>> properly. The only offer ftp right now. I'll leave most of the book as
>>>>> is for now as the ALSA home page and everyone else (Arch, etc) also points
>>>>> to the ftp site for sources.
>>>>>
>>>>> There is a problem with alsa-firmware.
>>>>> https://alsa-project.org/wiki/Main_Page now only points to git.
>>>>>
>>>>> I am proposing dropping alsa-firmware from the book. There is nothing
>>>>> that references it.
>>>>>
>>>>> Any objections?
>>>
>>>> I was going to say go ahead, but it looks like it installs firmware for
>>>> Sound Blaster 16 cards, which is what Qemu and other virtualization
>>>> software emulate. I'm not sure if we'll still be able to get sound out of
>>>> VMs if we drop this.
>>>
>>> I've never tried to get sound out of a VM. Could the user just use a
>>> different sound hw emulation?
>>>
>>> $ qemu -soundhw list
>>> qemu: -soundhw list: Unknown sound card name `list'
>>> Valid sound card names (comma separated):
>>> sb16 Creative Sound Blaster 16
>>> es1370 ENSONIQ AudioPCI ES1370
>>> ac97 Intel 82801AA AC97 Audio
>>> adlib Yamaha YM3812 (OPL2)
>>> gus Gravis Ultrasound GF1
>>> cs4231a CS4231A
>>> hda Intel HD Audio
>>> pcspk PC speaker
>>>
>> I think the only ones out of that list that *doesn't* need Firmware are HDA
>> and PCSPK. The others have firmware installed by alsa-firmware.
>>
>> I'd have to try HDA and get back to you. Everything I've ever seen or used
>> has
>> SB16, from a variety of different hypervisors.
>>
>
> I use ac97 (-soundhw ac97), and I always get sound in qemu (pulseaudio is
> doing pretty well nowadays)... Well, at least with Debian qemu. Will try blfs
> qemu...
>
Eventually came to that this morning: I can confirm AC97 in qemu does not need
alsa firmware...
Note that, on the host (so not relevant for the above), for some reason, I
need to have a /etc/asounf.conf file containing:
pcm.!default {
type hw
card 1
}
ctl.!default {
type hw
card 1
}
ie make card 1 the default. I do not know how the kernel chooses card
numbering, but card 0 is HDA intel HDMI (which is not plugged) and card 1 is
HDA intel PCH, which I use. When using pulseaudio, the good card is
automatically chosen...
So it could be a good idea to replace --audio-drv-list=alsa with
--audio-drv-list=pa in qemu configure command (not tried yet)...
Pierre
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