Bug 25799
| Summary: | pcm doesn't always autocreate device aliases w/ DEVFS | ||||||
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| Product: | Base System | Reporter: | Alex Kapranoff <alex> | ||||
| Component: | kern | Assignee: | cg | ||||
| Status: | Closed FIXED | ||||||
| Severity: | Affects Only Me | ||||||
| Priority: | Normal | ||||||
| Version: | 5.0-CURRENT | ||||||
| Hardware: | Any | ||||||
| OS: | Any | ||||||
| Attachments: |
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Responsible Changed From-To: freebsd-bugs->cg Cameron is the sound guy your hints for pcm0 are invalid. for an sb16, pcm will attach to sbc
automatically. you are creating a phantom pcm0 device.
on a correctly configured system, the first sound device will always be
pcm0, so this patch is unnecessary.
-cg
On Sat, Mar 24, 2001 at 05:13:09PM -0000, Cameron Grant wrote: > your hints for pcm0 are invalid. for an sb16, pcm will attach to sbc > automatically. you are creating a phantom pcm0 device. I've just cleared my hints file from old cruft generated by `gethints.pl' when I first ran it long long time ago. And indeed pcm1 weirdness has gone away. I now have pretty straightforward sbc0 & pcm0 pair. Thanks for your advice, Cameron! > on a correctly configured system, the first sound device will always be > pcm0, so this patch is unnecessary. Yes, and therefore PR should be closed now. Thanks again for the wonderful sound experience I have with FreeBSD :) -- Alex Kapranoff, Voice: +7(0832)791845 We've lived 11 weeks in the brand new millenium... State Changed From-To: open->closed User error; submitter requests closure |
I have the following sound-related devices in /dev after boot: crw-rw-rw- 1 root wheel 30, 20 14 ÍÁÒ 13:39 /dev/audio1.0 crw-rw-rw- 1 root wheel 30, 0x00010014 14 ÍÁÒ 13:39 /dev/audio1.1 crw-rw-rw- 1 root wheel 30, 19 14 ÍÁÒ 13:39 /dev/dsp1.0 crw-rw-rw- 1 root wheel 30, 0x00010013 14 ÍÁÒ 13:39 /dev/dsp1.1 crw-rw-rw- 1 root wheel 30, 21 14 ÍÁÒ 13:39 /dev/dspW1.0 crw-rw-rw- 1 root wheel 30, 0x00010015 14 ÍÁÒ 13:39 /dev/dspW1.1 crw-rw-rw- 1 root wheel 30, 16 14 ÍÁÒ 13:39 /dev/mixer1 cr--r--r-- 1 root wheel 30, 6 14 ÍÁÒ 13:39 /dev/sndstat And sysctl hw.snd.unit is (default value): hw.snd.unit: 0 pcm driver does not create /dev/{audio,dsp,dspW,mixer} aliases because it tries to use unit 0 (according to hw.snd.unit), whereas my box only have unit 1. See /sys/dev/sound/pcm/sound.c:pcm_makelinks() Fix: First, you can set hw.snd.unit to 1 or whatever in your kernel hints file or in /boot/device.hints. Next, you can set hw.snd.unit to 1 by appending 'hw.snd.unit=1' to your /etc/rc.sysctl file. And last. With proposed patch, hw.snd.unit defaults to '-1' which now means 'autoselect the first existing unit for making aliases in /dev'. This variant is prefered :) This PR supercedes my old and rather lame kern/21308 so whoever cares please close kern/21308 as soon as this one.