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On Tue, Apr 28, 2020 at 6:51 AM Peter Humphrey <peter@××××××××××××.uk> |
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wrote: |
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> |
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> On Tuesday, 28 April 2020 14:18:52 BST Mark Knecht wrote: |
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> |
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> Has KMail started misbehaving again? I'm certain I read a reply from |
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Michael, |
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> but now there's no trace of it after a reboot (see below). Anyway, I |
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created |
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> an /etc/asound.conf with the content he recommended. That gave me sound |
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back. |
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> Thanks Michael. |
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> |
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|
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I don't use asound.conf on any of my machines. Be careful about mixing |
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instructions from multiple folks trying to help you. It will confuse us (or |
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me anyway) to no end. |
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|
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> > 1) First, if you really don't want the intel stuff loaded then either |
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don't |
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> > build it in your kernel or (easier - it's what I do) just blacklist the |
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> > intel sound driver. The following link has some instructions which |
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explain |
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> > the process. |
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> |
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> > https://www.techtimejourney.net/how-to-blacklist-a-sound-card-in-linux/ |
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> |
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> Thanks for the pointer, Mark. |
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> |
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> > Please provide the output of |
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> > |
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> > ls /proc/asound |
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> > cat /proc/asound/cards |
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> > cat /proc/asound/modules |
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> |
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> # ls /proc/asound |
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> card0 card2 Device HDMI modules pcm timers version |
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> card1 cards devices hwdep oss seq USB |
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> |
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> # cat /proc/asound/cards |
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> 0 [HDMI ]: HDA-Intel - HDA ATI HDMI |
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> HDA ATI HDMI at 0xfbe60000 irq 59 |
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> 1 [USB ]: USB-Audio - HD Webcam USB |
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> HD Webcam USB HD Webcam USB at usb-0000:00:14.0-6, |
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high |
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> speed |
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> 2 [Device ]: USB-Audio - USB Audio Device |
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> C-Media Electronics Inc. USB Audio Device at |
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> usb-0000:00:14.0-13, full speed |
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> |
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> # cat /proc/asound/modules |
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> 0 snd_hda_intel |
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> 1 snd_usb_audio |
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> 2 snd_usb_audio |
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> |
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|
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OK, so card 0 is using snd_hda_intel. Card 0 is most likely the default |
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location that sound is going. Blacklisting it will help. That said you have |
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2 USB devices so we need to be careful about extra confusion there. For |
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simplicity you might just unplug the webcam (if you can - if this is a |
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built-in in a laptop then I understand you have limitations.) |
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|
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> > 1) First, if you really don't want the intel stuff loaded then either |
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don't |
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> > build it in your kernel or (easier - it's what I do) just blacklist the |
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> > intel sound driver. The following link has some instructions which |
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explain |
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> > the process. |
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> > |
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> > https://www.techtimejourney.net/how-to-blacklist-a-sound-card-in-linux/ |
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> > |
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> > Restart Alsa and double check the cards and modules shown in |
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/proc/asound. |
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> > |
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> > 2) As you are on KDE you likely have pulseaudio running. Run |
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pavucontrol, |
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> > run Firefox with some audio and see where you are sending Firefox audio. |
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> |
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> Nope. No pulseaudio. |
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> |
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|
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What is the output of pulseaudio at the command line? |
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|
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Or maybe just no pluseaudio tools, or whatever it's called on Gentoo |
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assuming it's a separate package. I'm no longer running Gentoo (I just find |
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this list the best place to get real info) A quick google for pavucontrol |
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suggests you can emerge media-sound/pavucontrol to get it. |
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|
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Use KDE systemsettings, search for sound, choose 'Multimedia', Under 'Audio |
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Volume' what do you see? What device is set as default? (This part of |
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systemsettings is very similar to pavucontrol but it doesn't give you the |
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VU meters which are nicely visible to see what apps are generating audio. |
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|
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|
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> > 3) You probably don't have to mess with Alsa configuration itself to fix |
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> > this so keep it simple for now. We can go there later if need be. |
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> |
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> Meanwhile there are a few complications. First, I also have a webcam with |
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a |
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> microphone. I should have unplugged this before asking my question. |
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> |
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|
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Agreed. Leave it disconnected for now for simplicity. |
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|
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> Second, there's a sound driver in my Radeon Pro WX 5100, which I may want |
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to |
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> experiment with later if I can find a way to extract the sound from my |
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> DisplayPort link (not HDMI after all; I was mistaken about that in an |
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earlier |
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> thread). I can't disable it anyway, as far as I know. It may account for |
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the |
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> Intel modules. |
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> |
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|
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No problem. Either blacklist the driver (easy) or rebuild the kernel |
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WITHOUT the driver (easy). Either should get rid of snd_hda_intel |
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|
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> Third, I haven't any alsa packages installed, except for alsamixer which I |
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> installed to help with this problem (it didn't). There's no starting or |
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> stopping alsa; KDE seems to have what it needs without alsa specifically. |
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> That's why I had no asound.conf; it's also why I rebooted instead of doing |
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> something less heavy handed. Then again, why do I need an asound.conf? |
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> |
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|
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No. The fact that you can cat "/proc/asound" asound being "Alsa Sound" says |
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Alsa is running. Alsa talks to your sound card hardware and provides a |
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"single application" interface to the sound cards. Pulseaudio provides a |
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mixer so that multiple apps can all send sound to your hardware. |
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I personally don't think you need asound.conf until you prove that you have |
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a need to do some sort of non-standard configuration. That _might_ be |
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defining a different default card but KDE can do that for you in system |
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settings so my recommendation is no asound.conf for now. Use KDE as it's |
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intended and (over the long run) I think it's more maintainable. However, |
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you are completely free to use your system any way you want. |
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> -- |
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> Regards, |
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> Peter. |
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> |
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> |
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> |