[alsa-devel] Unlikely big volume range Plantronics BT300
Hi,
when I connect the bluetooth BT300 of my Plantronics Headset I can see the following warning:
[172855.985539] usb 2-1.3: Warning! Unlikely big volume range (=720), cval->res is probably wrong. [172855.985544] usb 2-1.3: [5] FU [PCM Playback Volume] ch = 1, val = -10240/1280/16
As far as I understand it, the problem may be solved by applying a quirk which is already applied for Logitech webcams. Can somebody help me in finding out the correct value for cval->res. I have no clue which calculations are necessary for that.
Thanks in advance. Dennis Kadioglu
Dennis Kadioglu wrote:
when I connect the bluetooth BT300 of my Plantronics Headset I can see the following warning:
[172855.985539] usb 2-1.3: Warning! Unlikely big volume range (=720), cval->res is probably wrong.
As far as I understand it, the problem
What problem? Doesn't the mixer control work correctly?
Regards, Clemens
Hi Clemens,
Apologies for my late reply! The mail got lost in my inbox.
What problem? Doesn't the mixer control work correctly?
As far as I can tell the mixer works as it should. I was just curious about the meaning of this warning and tried to fix it. Sadly I was not able to find out, which calculations using which parameters are necessary to get a correct value for cval->res. I would be glad, if you could give me some hints.
Thanks and best Dennis
----- Ursprüngliche Mail ----- Von: "Clemens Ladisch" clemens@ladisch.de An: "Dennis Kadioglu" denk@post.com, alsa-devel@alsa-project.org Gesendet: Donnerstag, 7. April 2016 08:47:39 Betreff: Re: [alsa-devel] Unlikely big volume range Plantronics BT300
Dennis Kadioglu wrote:
when I connect the bluetooth BT300 of my Plantronics Headset I can see the following warning:
[172855.985539] usb 2-1.3: Warning! Unlikely big volume range (=720), cval->res is probably wrong.
As far as I understand it, the problem
What problem? Doesn't the mixer control work correctly?
Regards, Clemens
participants (2)
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Clemens Ladisch -
Dennis Kadioglu