Comment 23 for bug 1926165
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| Peter F. Patel-Schneider (pfpschneider) wrote | #23 |
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0e1f616
(Get the code!)
I have a Yoga C940, which is the precursor to the 9i. It has the soundbar and two speakers under the body of the laptop. Out of the box the body speakers did't work but there is a special BIOS for the C940 (only) that activates an amplifier for these speakers. I think that the C940 only has two-channel sound, with something (alsa?, pulse?) mixing the five channels down to two and the sound chip distributing sound to the speakers.
When I look at the built-in sound card with alsamixer I see a Bass Speaker double toggle, that may be the result of the special BIOS. This toggle controls the two speakers under the laptop body. The laptop's sound is much better with the body speakers turned on, but I have heard that the sound is even better using the Windows drivers.
Is the intent of the shell script to turn on the amplifier for the body speakers? If this is the case it should be possible to ditch the special BIOS, which would be nice. I'm sure that there are users who don't want to run an unofficial BIOS.
The C930 has a similar setup. Should this patch fix its speaker problems?
It would be nice to get some documentation on the verbs in the shell script and what they do to the sound chip.