Hi,
I bought a FiiO E7 USB headphone amplifier after having read that it
works fine under Linux [1] [2], but I've not had any luck getting
sound out of it.
When running alsamixer I see "USB Audio DAC" come up when pressing
the F6 "Select sound card". Selecting that and adjusting the volume
accomplishes nothing...no sound out of the headphones plugged into the
device (whereas the headphone jack on my x200s ThinkPad works fine).
I've also unmuted everything in alsamixer.
I'm running Debian sid, here's some info from my system:
% cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xf2620000 irq 47
1 [default ]: USB-Audio - USB Audio DAC
Burr-Brown from TI USB Audio DAC at usb-0000:00:1a.0-1, full s
29 [ThinkPadEC ]: ThinkPad EC - ThinkPad Console Audio Control
ThinkPad Console Audio Control at EC reg 0x30, fw 7XHT24WW-1.06
% lspci -vv
[...]
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
Subsystem: Lenovo Device 20f2
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin B routed to IRQ 47
Region 0: Memory at f2620000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
% cat /etc/modprobe.d/alsa-base.conf
# autoloader aliases
install sound-slot-0 /sbin/modprobe snd-card-0
install sound-slot-1 /sbin/modprobe snd-card-1
install sound-slot-2 /sbin/modprobe snd-card-2
install sound-slot-3 /sbin/modprobe snd-card-3
install sound-slot-4 /sbin/modprobe snd-card-4
install sound-slot-5 /sbin/modprobe snd-card-5
install sound-slot-6 /sbin/modprobe snd-card-6
install sound-slot-7 /sbin/modprobe snd-card-7
# Cause optional modules to be loaded above generic modules
install snd /sbin/modprobe --ignore-install snd && { /sbin/modprobe --quiet snd-ioctl32 ; /sbin/modprobe --quiet snd-seq ; }
install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi && { /sbin/modprobe --quiet snd-seq-midi ; : ; }
install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 && { /sbin/modprobe --quiet snd-emu10k1-synth ; : ; }
# Prevent abnormal drivers from grabbing index 0
options bt87x index=-2
options cx88_alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
# Keep snd-pcsp from beeing loaded as first soundcard
options snd-pcsp index=-2
# Keep snd-usb-audio from beeing loaded as first soundcard
options snd-usb-audio index=-2
[1] "The FiiO E7 Headphone Amplifier is an USB DAC dedicated to high fidelity
headphone. It works out of the box with my Ubuntu 11.04. I just plug it when I
need it and several seconds later it appears in my output sound devices list."
http://linuxhcl.com/browse/product+fiio-e7-headphone-amplifier?id=7629
[2] http://www.amazon.com/review/R3KNBXJW8CUCU6/ref=cm_cr_pr_perm?ie=UTF8&ASIN=B003E6K1VK&nodeID=&tag=&linkCode=
http://www.amazon.com/review/R3NJHU8Q7L7D9V/ref=cm_cr_rdp_perm?ie=UTF8&ASIN=B003E6K1VK&nodeID=&tag=&linkCode=
Any suggestions regarding how to troubleshoot this much appreciated.
Thanks,
John
--
John Magolske
http://B79.net/contact
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