Date: Mon, 23 May 2011 14:00:25 GMT From: Niclas Zeising <niclas.zeising@gmail.com> To: freebsd-doc@FreeBSD.org Subject: Re: docs/155264: [handbook] Extend "7.2.2.1 Common Problems" with hw.snd.default_unit=n Message-ID: <201105231400.p4NE0PGZ012980@freefall.freebsd.org>
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The following reply was made to PR docs/155264; it has been noted by GNATS. From: Niclas Zeising <niclas.zeising@gmail.com> To: bug-followup@FreeBSD.org, martin.ziegler@ziegi.ch Cc: Subject: Re: docs/155264: [handbook] Extend "7.2.2.1 Common Problems" with hw.snd.default_unit=n Date: Mon, 23 May 2011 15:58:18 +0200 This is a multi-part message in MIME format. --------------010301040701020801080000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi! Here is a patch to add a section about this to 7.2.2.1. Regards! -- Niclas --------------010301040701020801080000 Content-Type: text/plain; name="multimedia.chapter.sgml.diff" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="multimedia.chapter.sgml.diff" Index: chapter.sgml =================================================================== RCS file: /home/ncvs/doc/en_US.ISO8859-1/books/handbook/multimedia/chapter.sgml,v retrieving revision 1.141 diff -u -d -r1.141 chapter.sgml --- chapter.sgml 3 Mar 2011 16:21:59 -0000 1.141 +++ chapter.sgml 23 May 2011 13:29:32 -0000 @@ -353,6 +353,38 @@ </tbody> </tgroup> </informaltable> + <para>Another issue is that modern graphics cards often comes with their + own sound driver, for use with <acronym>HDMI</acronym> and similar. This + sound device will sometimes be enumerated before the actual soundcard + and the soundcard will subsequently not be used as the default playback + device. To check if this is the case, run + <application>dmesg</application> and look for <literal>pcm</literal>. + The output looks something like this:</para> + <programlisting>... +hdac0: HDA Driver Revision: 20100226_0142 +hdac1: HDA Driver Revision: 20100226_0142 +hdac0: HDA Codec #0: NVidia (Unknown) +hdac0: HDA Codec #1: NVidia (Unknown) +hdac0: HDA Codec #2: NVidia (Unknown) +hdac0: HDA Codec #3: NVidia (Unknown) +pcm0: <HDA NVidia (Unknown) PCM #0 DisplayPort> at cad 0 nid 1 on hdac0 +pcm1: <HDA NVidia (Unknown) PCM #0 DisplayPort> at cad 1 nid 1 on hdac0 +pcm2: <HDA NVidia (Unknown) PCM #0 DisplayPort> at cad 2 nid 1 on hdac0 +pcm3: <HDA NVidia (Unknown) PCM #0 DisplayPort> at cad 3 nid 1 on hdac0 +hdac1: HDA Codec #2: Realtek ALC889 +pcm4: <HDA Realtek ALC889 PCM #0 Analog> at cad 2 nid 1 on hdac1 +pcm5: <HDA Realtek ALC889 PCM #1 Analog> at cad 2 nid 1 on hdac1 +pcm6: <HDA Realtek ALC889 PCM #2 Digital> at cad 2 nid 1 on hdac1 +pcm7: <HDA Realtek ALC889 PCM #3 Digital> at cad 2 nid 1 on hdac1 +...</programlisting> + <para> Here the graphics card (<literal>NVidia</literal>) has been + enumerated before the sound card (<literal>Realtek ALC889</literal>). + To use the sound card as default playback device, change + <literal>hw.snd.default_unit</literal> to the unit that should be used + for playback, using + <screen>&prompt.root; <userinput>sysctl hw.snd.default_unit=n</userinput></screen> + where <literal>n</literal> is the number of the sound device to use, in + this example <literal>4</literal>.</para> </sect3> </sect2> --------------010301040701020801080000--
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