From: Daniel Mack <daniel@zonque.org>
To: "Linus Lüssing" <linus.luessing@web.de>
Cc: alsa-devel@alsa-project.org, Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Volume issues: Logitech S-150 USB Digital Speaker / "usb_audio: Warning! Unlikely big volume range"
Date: Mon, 16 Dec 2013 20:18:26 +0100 [thread overview]
Message-ID: <20131216191825.GA25312@tamtam.fritz.box> (raw)
In-Reply-To: <20131212013529.GE5606@Linus-Debian>
On Thu, Dec 12, 2013 at 02:35:29AM +0100, Linus Lüssing wrote:
> I'm currently trying to use a Logitech S-150 USB Digital Speaker.
> Unfortunately, the volume range is way off, i.e. only 1% and 2%
> settings in the alsamixer are actually usable for general
> playback.
>
> dmesg:
> -----
> [ 9850.768093] usb 1-1: new full-speed USB device number 2 using uhci_hcd
> [ 9850.948103] usb 1-1: New USB device found, idVendor=1130, idProduct=1620
> [ 9850.948123] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
> [ 9850.948138] usb 1-1: Product: USB AUDIO
> [ 9852.353857] hidraw: raw HID events driver (C) Jiri Kosina
> [ 9852.397038] usb_audio: Warning! Unlikely big volume range (=17152), cval->res is probably wrong.
You're facing a firmware bug, most probably just an endianess issue
(17152 = 0x4300). You can add a quirk for this device in order to fix
it up. Have a look at volume_control_quirks() in sound/usb/mixer.c if
you want, or tell me the name of the affected volume control.
> [ 9852.397054] usb_audio: [2] FU [PCM Playback Volume] ch = 2, val = 0/17152/1<6>[ 9852.399123] usbcore: registered new interface driver snd-usb-audio
> [ 9852.412386] usbcore: registered new interface driver usbhid
> [ 9852.412400] usbhid: USB HID core driver
> [ 9852.562358] input: USB AUDIO as /devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1:1.2/input/input12
> [ 9852.563157] hid-generic 0003:1130:1620.0001: input,hidraw0: USB HID v1.10 Device [USB AUDIO ] on usb-0000:00:1d.0-1/input2
> -----
>
> lsusb -d 1130:1620 (for lsusb -vvv, see attachment)
> -----
> Bus 001 Device 002: ID 1130:1620 Tenx Technology, Inc.
> -----
>
> The detected vendor does not seem to match, so all in all
> looks like a kernel bug?
No, lsusb just shows you the name of the company that registered the USB
vendor ID, 0x1130 in this case. Logitech seems to have licensed a design
from another company here.
Daniel
prev parent reply other threads:[~2013-12-16 19:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-12 1:35 Volume issues: Logitech S-150 USB Digital Speaker / "usb_audio: Warning! Unlikely big volume range" Linus Lüssing
2013-12-16 19:18 ` Daniel Mack [this message]
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