new laptop, no sound in spite of driver attaching

Tue May 1 11:11:16 UTC 2018

> To get sound working on my MacbookAir I have the following in 
> "/boot/loader.conf"
>
> # Fix audio output not getting any voltage, see: man snd_hda
> hint.hdaa.1.config="ovref"
> hint.hdaa.1.gpio_config="0=set"
>
lots of tries but i think it's not a problem because of

pcm0: chn_write(): pcm0:virtual:dsp0.vp0: play interrupt timeout, channel dead

so it doesn't seem like sound not being directed properly but dma/irq 
problem.

> # Assign Headphones (nid16) to same "as" group as Speakers with seq=15 to 
> enable switching between them
> hint.hdaa.1.nid16.config="as=1 seq=15"
>
> Had to use the time old method of Trial and Error using various combinations 
> of values for the first two lines until it finally worked!
>
> Probably won't be the same values for your laptop, but might give you a path 
> of enquiry...
>
> PS: I'm deeply grateful for the work done on bringing the i915 driver upto 
> scratch for Intel Broadwell,

i installed /usr/ports/graphics/drm-stable-kmod to get working intel 
graphics. but works fine now.

> it has meant I can now use FreeBSD as my main OS on this laptop everyday with 
> fantastic battery life too (~16 hours!)
>
>
> On 30/04/2018 16:54, Richard Yao wrote:
>> 
>>> On Apr 30, 2018, at 11:15 AM, Eric van Gyzen <eric at vangyzen.net> wrote:
>>> 
>>>> On 04/30/2018 09:57, Richard Yao wrote:
>>>> 
>>>> 
>>>>>> On Apr 30, 2018, at 10:43 AM, Eric van Gyzen <eric at vangyzen.net> wrote:
>>>>>> 
>>>>>> On 04/30/2018 06:58, Wojciech Puchar wrote:
>>>>>> and no idea where to search for a solution
>>>>>> 
>>>>>> FreeBSD laptop.wojtek.intra 11.1-STABLE FreeBSD 11.1-STABLE #2: Mon Apr
>>>>>> 30 13:35:54 CEST 2018
>>>>>> root at laptop.wojtek.intra:/usr/src/sys/amd64/compile/laptop  amd64
>>>>>> 
>>>>>> 
>>>>>> in dmesg
>>>>>> hdac0: <Intel (0x2284) HDA Controller> mem 0x91410000-0x91413fff irq 22
>>>>>> at device 27.0 on pci0
>>>>>> hdacc0: <Realtek ALC282 HDA CODEC> at cad 0 on hdac0
>>>>>> hdaa0: <Realtek ALC282 Audio Function Group> at nid 1 on hdacc0
>>>>>> pcm0: <Realtek ALC282 (Analog)> at nid 20 and 25 on hdaa0
>>>>>> pcm1: <Realtek ALC282 (Analog)> at nid 33 and 18 on hdaa0
>>>>>> hdacc1: <Intel (0x2883) HDA CODEC> at cad 2 on hdac0
>>>>>> hdaa1: <Intel (0x2883) Audio Function Group> at nid 1 on hdacc1
>>>>>> pcm2: <Intel (0x2883) (HDMI/DP 8ch)> at nid 5 on hdaa1
>>>>>> 
>>>>>> 
>>>>>> tried to change hw.snd.default_unit to 0, 1 or 2 - no sound in any 
>>>>>> case.
>>>>>> 
>>>>>> mixer when default_unit is 0
>>>>>> 
>>>>>> Mixer vol      is currently set to  65:65
>>>>>> Mixer pcm      is currently set to 100:100
>>>>>> Mixer speaker  is currently set to 100:100
>>>>>> Mixer mic      is currently set to   0:0
>>>>>> Mixer mix      is currently set to 100:100
>>>>>> Mixer rec      is currently set to   0:0
>>>>>> Mixer igain    is currently set to   0:0
>>>>>> Mixer ogain    is currently set to 100:100
>>>>>> Recording source: mic
>>>>>> 
>>>>>> 
>>>>>> mixer when default_unit is 1
>>>>>> 
>>>>>> Mixer vol      is currently set to 100:100
>>>>>> Mixer pcm      is currently set to 100:100
>>>>>> Mixer rec      is currently set to  37:37
>>>>>> Mixer igain    is currently set to   0:0
>>>>>> Mixer monitor  is currently set to  56:56
>>>>>> 
>>>>>> mixer when default_unit is 2
>>>>>> 
>>>>>> Mixer vol      is currently set to 100:100
>>>>>> Mixer pcm      is currently set to 100:100
>>>>>> 
>>>>>> this is HP 250 G5 laptop
>>>>> HDA is apparently very difficult for vendors to get right.  Linux has
>>>>> thousands of lines of vendor- and model-specific patches to fix it.
>>>>> Start here:
>>>>> 
>>>>> https://github.com/torvalds/linux/blob/master/sound/pci/hda/patch_realtek.c
>>>>> 
>>>>> If you're lucky, you'll find a patch for your laptop or a similar laptop
>>>>> that has the same problem(s).  The next step is to figure out how to
>>>>> express the patch in FreeBSD's driver.
>>>>> 
>>>>> Hopefully, someone will take interest in porting many of Linux's HDA
>>>>> patches to FreeBSD.  Sound is probably one of the top three reasons
>>>>> people fail to run FreeBSD on their laptop.
>>>> What are the other two? Graphics support and easy management of WiFi?
>>> I would say graphics and suspend/resume.  WiFi management is certainly
>>> an annoyance, but if the hardware works, I can cope with that.  If the
>>> sound hardware doesn't work, it's useless (until I can find the time to
>>> study /two/ HDA drivers).
>>> 
>>> Granted, I had to replace the Atheros card in my XPS 13 with an Intel,
>>> but that was only 19 USD and about 20 minutes, so that was also just an
>>> annoyance.
>> Certain laptops have BIOS whitelists that prevent people from doing that 
>> without flashing coreboot modifying the BIOS. You were lucky.
>>>> I hate to say that, but those are the two that kept me from adopting 
>>>> Gentoo FreeBSD on my laptop when I wanted to install it several years 
>>>> ago. The intel sandy bridge graphics support was new enough that it had 
>>>> not really made it downstream to Gentoo FreeBSD and the lack of a network 
>>>> manager equivalent for doing easy connection and disconnection to WiFi 
>>>> networks from a BSD userland was a headache. :/
>>> I'm really grateful for all the recent graphics work.  Without it, my
>>> XPS 13 would be running Linux for sure.  I would thank people by name,
>>> but I would miss some.  You know who you are.  :)
>>> 
>>> Eric
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