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audiodef
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Joined: 06 Jul 2005
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PostPosted: Sat Feb 03, 2018 3:33 pm    Post subject: Laptop speakers work but no sound via speakers Reply with quote

I have an HP Probook 6550b. I recently reinstalled Gentoo in a dual-boot with Win7. I noticed that booting into Windows after installing it, before installing laptop-specific drivers, sound works. I hear the Windows startup fanfare. Once I install drivers for this laptop, that all goes away and sound stops working through the speakers. Sound through speakers never worked on this laptop with Gentoo.

But I know the hardware works. What is going on and how can I get the laptop speakers working again in Gentoo? All the usual stuff has been done. ALSA works. The headphone out works. But even though I know the speakers work, no sound gets through to them.
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mahdi1234
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Joined: 19 Feb 2005
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PostPosted: Sun Feb 04, 2018 11:23 am    Post subject: Reply with quote

Did you check whether it's not muted? You can do

Quote:
alsamixer -c <card_number>
e.g.
Quote:
alsamixer -c 1

and check wheter speaker doesn't have "MM", you can unmute with M key.

cheers ...
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krinn
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PostPosted: Sun Feb 04, 2018 1:28 pm    Post subject: Reply with quote

many laptop need specific tweak to match their input/ouput to the correct one, a kind of like the codecs bit 3 is set for speakers (as it's default for that codec) and the laptop maker is using bit 3 for a recording entry, and alsamixer mistake who is who....

for them, you need a tweak that reorder the things properly, did you check alsa documentation (the one in kernel) to see list of laptop and tweak need for the card, and set tweak for that laptop ?
(i love to say tweak!)

You have also the hdmi is default sound card trouble: https://wiki.gentoo.org/wiki/ALSA#Laptops_with_HDMI_audio_output
It does the same (the soundcard speakers are not use per default).

That's two things i would check
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audiodef
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PostPosted: Sun Feb 04, 2018 10:41 pm    Post subject: Reply with quote

Thanks, I'll check for those things. :)
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The_Document
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Joined: 03 Feb 2018
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PostPosted: Mon Feb 05, 2018 1:40 am    Post subject: Re: Laptop speakers work but no sound via speakers Reply with quote

audiodef wrote:
I have an HP Probook 6550b. I recently reinstalled Gentoo in a dual-boot with Win7. I noticed that booting into Windows after installing it, before installing laptop-specific drivers, sound works. I hear the Windows startup fanfare. Once I install drivers for this laptop, that all goes away and sound stops working through the speakers. Sound through speakers never worked on this laptop with Gentoo.

But I know the hardware works. What is going on and how can I get the laptop speakers working again in Gentoo? All the usual stuff has been done. ALSA works. The headphone out works. But even though I know the speakers work, no sound gets through to them.


Try enabling most of the HDA audio codecs.
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