[sf-lug] USB mic not working under 14.04

Christian Einfeldt einfeldt at gmail.com
Thu Sep 6 19:04:54 PDT 2018 

Hi, I just wanted to thank everyone who replied to this thread.  I ran this
command twice:

dmesg | tail -f

once without the mic plugged in and then a second time with the mic plugged
directly into a USB slot.  It seems to me that my computer sees the USB
mic, am I correct in that? It looks like the vendor ID is 0d8c and the
product ID is 000c, is that correct?  Here is the output:

me at mycomputer:~$ dmesg | tail -f
[   23.202799] init: plymouth-upstart-bridge main process (1308) terminated
with status 1
[   23.202809] init: plymouth-upstart-bridge main process ended, respawning
[   41.883763] init: plymouth-stop pre-start process (1528) terminated with
status 1
[   45.999682] audit_printk_skb: 60 callbacks suppressed
[   45.999685] audit: type=1400 audit(1536279638.804:32): apparmor="STATUS"
operation="profile_replace" profile="unconfined"
name="/usr/lib/cups/backend/cups-pdf" pid=1550 comm="apparmor_parser"
[   45.999691] audit: type=1400 audit(1536279638.804:33): apparmor="STATUS"
operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd"
pid=1550 comm="apparmor_parser"
[  206.751102] chrome[1937]: segfault at 200 ip 00007f89d942ca58 sp
00007ffdd51ba280 error 4 in i965_dri.so[7f89d90ac000+5f9000]
[  207.716536] chrome[1991]: segfault at 200 ip 00007fac13164a58 sp
00007ffcaed352f0 error 4 in i965_dri.so[7fac12de4000+5f9000]
[  207.894388] chrome[2009]: segfault at 200 ip 00007fcc97f93a58 sp
00007ffc43004e00 error 4 in i965_dri.so[7fcc97c13000+5f9000]
[ 1330.959895] traps: chrome[2131] trap invalid opcode ip:55d0776be3ed
sp:7ffd0e110998 error:0 in chrome[55d072f13000+6378000]
me at mycomputer:~$ dmesg | tail -f
[  207.716536] chrome[1991]: segfault at 200 ip 00007fac13164a58 sp
00007ffcaed352f0 error 4 in i965_dri.so[7fac12de4000+5f9000]
[  207.894388] chrome[2009]: segfault at 200 ip 00007fcc97f93a58 sp
00007ffc43004e00 error 4 in i965_dri.so[7fcc97c13000+5f9000]
[ 1330.959895] traps: chrome[2131] trap invalid opcode ip:55d0776be3ed
sp:7ffd0e110998 error:0 in chrome[55d072f13000+6378000]
[ 4751.061399] usb 1-1.4: new full-speed USB device number 3 using ehci-pci
[ 4751.154774] usb 1-1.4: New USB device found, idVendor=0d8c,
idProduct=000c
[ 4751.154780] usb 1-1.4: New USB device strings: Mfr=0, Product=1,
SerialNumber=0
[ 4751.154783] usb 1-1.4: Product: C-Media USB Headphone Set
[ 4751.156079] input: C-Media USB Headphone Set   as
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.3/0003:0D8C:000C.0003/input/input13
[ 4751.209702] hid-generic 0003:0D8C:000C.0003: input,hidraw2: USB HID
v1.00 Device [C-Media USB Headphone Set  ] on usb-0000:00:1a.0-1.4/input3
[ 4752.237430] usbcore: registered new interface driver snd-usb-audio
me at mycomputer:~$

If I go to http://www.linux-usb.org/usb.ids and paste the suspected vendor
ID into cntrl+F on that page, I get this info:

0d8c C-Media Electronics, Inc.

	0001  Audio Device
	0002  Composite Device
	0003  Sound Device
	0005  Blue Snowball
	0006  Storm HP-USB500 5.1 Headset
	000c  Audio Adapter
	000d  Composite Device
	000e  Audio Adapter (Planet UP-100, Genius G-Talk)
	0014  Audio Adapter (Unitek Y-247A)
	001f  CM108 Audio Controller
	0102  CM106 Like Sound Device
	0103  CM102-A+/102S+ Audio Controller
	0104  CM103+ Audio Controller
	0105  CM108 Audio Controller
	0107  CM108 Audio Controller
	010f  CM108 Audio Controller
	0115  CM108 Audio Controller
	0139  Multimedia Headset [Gigaware by Ignition L.P.]
	013c  CM108 Audio Controller
	0201  CM6501
	5000  Mass Storage Controller
	5200  Mass Storage Controller(0D8C,5200)
	b213  USB Phone CM109 (aka CT2000,VPT1000)


Notice that the device shows up as an Audio Adapter, is that weird?  What
might be the next step (if any) that I could take to getting this mic
working?

Rick had suggested just plugging the mic directly into the USB port, which
I did for the second test above, and then I ran a third test with the mic
plugged into the USB hub base.  Am I correct in saying that there appears
to be no difference, in that the vendor and the device are still showing up
the same?

me at mycomputer:~$ dmesg | tail -f
[ 4751.156079] input: C-Media USB Headphone Set   as
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.3/0003:0D8C:000C.0003/input/input13
[ 4751.209702] hid-generic 0003:0D8C:000C.0003: input,hidraw2: USB HID
v1.00 Device [C-Media USB Headphone Set  ] on usb-0000:00:1a.0-1.4/input3
[ 4752.237430] usbcore: registered new interface driver snd-usb-audio
[ 5824.875712] usb 1-1.4: USB disconnect, device number 3
[ 5875.512533] usb 1-1.4: new full-speed USB device number 4 using ehci-pci
[ 5875.605689] usb 1-1.4: New USB device found, idVendor=0d8c,
idProduct=000c
[ 5875.605696] usb 1-1.4: New USB device strings: Mfr=0, Product=1,
SerialNumber=0
[ 5875.605699] usb 1-1.4: Product: C-Media USB Headphone Set
[ 5875.618881] input: C-Media USB Headphone Set   as
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.3/0003:0D8C:000C.0004/input/input14
[ 5875.672758] hid-generic 0003:0D8C:000C.0004: input,hidraw2: USB HID
v1.00 Device [C-Media USB Headphone Set  ] on usb-0000:00:1a.0-1.4/input3
me at mycomputer:~$

Thanks again in advance for all thoughts on this issue.

On Thu, Sep 6, 2018 at 2:00 PM aaronco36 <aaronco36 at sdf.org> wrote:

>
> Michael Paoli <Michael.Paoli at cal.berkeley.edu> recently wrote at [1]:
> > I really like my usbidiff utility.
> > Run it. plug in USB device, wait a few seconds or whatever,
> > hit <ENTER>, get a reasonably concise report of what
> > (if anything) is newly picked up.
> >
> > See end further below:
>
> Not only that, but instead of running the mishmash of 80+ lines of
> uncommented and possibly ambiguous script+code within Lubuntu 14.04 and
> the step previously described by Ken S (e.g., as per [2]; probably [3]),
> there are also at least the options of running 'lsusb -v | less' at the
> commandline and/or running Linux kernel developer Greg Kroah-Hartman's[4]
> 'usbview' from the LXDE desktop to get a bit more detail on that MicFlex
> USB device.
> Check out their manpages via 'man 8 lsusb' and 'man 8 usbview'
> respectively (can visit webpages referred to in [5] and [6], and Greg
> K-H's [7]).
>
> Good luck!
> -A
>
> =============================================================
> References
> =============================================================
>
> [1]http://linuxmafia.com/pipermail/sf-lug/2018q3/013405.html
> [2]http://linuxmafia.com/pipermail/sf-lug/2018q3/013404.html
> [3]
> https://www.linux.com/blog/find-usb-device-details-linuxunix-using-lsusb-command
> [4]http://www.kroah.com/log/about.html
> [5]https://linux.die.net/man/8/lsusb
> [6]https://linux.die.net/man/8/usbview
> [7]http://www.kroah.com/linux-usb/
> =============================================================
>
> aaronco36 at sdf.org
> SDF Public Access UNIX System - http://sdf.org
>
> _______________________________________________
> sf-lug mailing list
> sf-lug at linuxmafia.com
> http://linuxmafia.com/mailman/listinfo/sf-lug
> Information about SF-LUG is at http://www.sf-lug.org/<br>
> Related Information <br>
> http://www.shallowsky.com/blog/<br>
> http://explainshell.com/ <br>
>


-- 
Christian Einfeldt
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