a) there's a solution (which of course would be best)
b) this is fixed in a later version. (Have been hestitant to upgrade since it's my work machine.)
What happens for me is that after plugging in my USB device (headset in this case), sound is routed through it, but to control the volume via the sound applet I need to manually select it as the output device afterwards. I can do this via the sound settings or even the sound applet itself, under "Output device...". Otherwise, the volume control applet still changes the volume of the speakers, which are now not receiving any sound.
This is similar to viewtopic.php?f=49&t=209861 except for the first point. Therefore I can't tell whether it's a separate issue entirely, or whether the poster has two individual issues where the second one is identical to mine. In any case, I don't see a clear indication that this is a hardware issue, rather than something with the sound panel applet. Therefore I wanted to post it into this forum. If you believe otherwise, please let me know!
My audio devices (from lsusb, lspci respectively):
Bus 001 Device 030: ID 046d:0a38 Logitech, Inc. Headset H340
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
This is a Dell XPS13, in case someone searches the forums for that. More hardware specs:
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System: Host: simmel Kernel: 3.19.0-22-generic x86_64 (64 bit, gcc: 4.8.2) Desktop: Cinnamon 2.6.13 (Gtk 2.24.23) Distro: Linux Mint 17.2 Rafaela Machine: System: Dell product: XPS 13 9343 Mobo: Dell model: 0310JH version: A00 Bios: Dell version: A05 date: 07/14/2015 CPU: Dual core Intel Core i7-5500U CPU (-HT-MCP-) cache: 4096 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 9577.64 Clock Speeds: 1: 839.062 MHz 2: 802.875 MHz 3: 801.093 MHz 4: 810.00 MHz Graphics: Card: Intel Broadwell-U Integrated Graphics bus-ID: 00:02.0 X.Org: 1.15.1 drivers: intel (unloaded: fbdev,vesa) Resolution: email@example.com GLX Renderer: Mesa DRI Intel Broadwell GLX Version: 3.0 Mesa 10.1.3 Direct Rendering: Yes Audio: Card-1: Intel Wildcat Point-LP High Definition Audio Controller driver: snd_hda_intel bus-ID: 00:1b.0 Card-2: Intel Broadwell-U Audio Controller driver: snd_hda_intel bus-ID: 00:03.0 Card-3: Logitech Headset H340 driver: USB Audio usb-ID: 001-030 Sound: Advanced Linux Sound Architecture ver: k3.19.0-22-generic Network: Card-1: Broadcom BCM4352 802.11ac Wireless Network Adapter driver: wl bus-ID: 02:00.0 IF: wlan0 state: up mac: <filter> Card-2: MosChip MCS7830 10/100 Mbps Ethernet adapter driver: MOSCHIP usb-ethernet driver usb-ID: 001-032 IF: eth1 state: up speed: 100 Mbps duplex: full mac: <filter> Drives: HDD Total Size: 512.1GB (76.1% used) 1: id: /dev/sda model: SAMSUNG_SSD_PM85 size: 512.1GB Partition: ID: / size: 46G used: 17G (40%) fs: ext4 ID: /home size: 424G used: 346G (87%) fs: ext4 RAID: No RAID devices detected - /proc/mdstat and md_mod kernel raid module present Sensors: System Temperatures: cpu: 67.0C mobo: 25.0C Fan Speeds (in rpm): cpu: N/A Info: Processes: 229 Uptime: 22 days Memory: 3175.0/7515.5MB Runlevel: 2 Gcc sys: 4.8.4 Client: Shell (bash 4.3.11) inxi: 1.9.17