(I use Ubuntu 14.04 64bit and the sound card is not broken as it works fine on Windows)
According to most of the reports online installing SC-5500p on Ubuntu seemed to be a cinch for most of the time. Some report that it even worked plug and play. At the end the day it can be said pretty safely that SC-5500p is built on standard audio drivers.
The following seems to be a more detailed version of what the GUI sound manager offers me (no Trust here):
$> cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xf7410000 irq 47
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xf6080000 irq 17
2 [Device ]: USB-Audio - USB Sound Device
USB Sound Device at usb-0000:00:14.0-1, full speed
The following is the output of lsusb -v which regards devices featuring the "Trust". The details of the second entry (after "[...]") is actually leaving no doubt that the referred to device is the SC-5500p.
Bus 003 Device 002: ID 15d9:0a4f Trust International B.V.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x15d9 Trust International B.V.
idProduct 0x0a4f
bcdDevice 1.00
iManufacturer 0
iProduct 1 USB OPTICAL MOUSE
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
[...]
Bus 003 Device 003: ID 145f:0143 Trust
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x145f Trust
idProduct 0x0143
bcdDevice 0.10
iManufacturer 0
iProduct 2 USB Sound Device
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
[...]
As suggested here I altered /etc/pulse/daemon.conf to feature the following two settings - but to no avail:
default-sample-channels = 6
enable-lfe-remixing = yes
Content of /etc/pusle/daemon.conf:
; daemonize = no
; fail = yes
; allow-module-loading = yes
; allow-exit = yes
; use-pid-file = yes
; system-instance = no
; local-server-type = user
; enable-shm = yes
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB
; lock-memory = no
; cpu-limit = no
; high-priority = yes
; nice-level = -11
; realtime-scheduling = yes
; realtime-priority = 5
; exit-idle-time = 20
; scache-idle-time = 20
; dl-search-path = (depends on architecture)
; load-default-script-file = yes
; default-script-file = /etc/pulse/default.pa
; log-target = auto
; log-level = notice
; log-meta = no
; log-time = no
; log-backtrace = 0
resample-method = speex-float-1
; enable-remixing = yes
enable-lfe-remixing = yes
flat-volumes = no
; rlimit-fsize = -1
; rlimit-data = -1
; rlimit-stack = -1
; rlimit-core = -1
; rlimit-as = -1
; rlimit-rss = -1
; rlimit-nproc = -1
; rlimit-nofile = 256
; rlimit-memlock = -1
; rlimit-locks = -1
; rlimit-sigpending = -1
; rlimit-msgqueue = -1
; rlimit-nice = 31
; rlimit-rtprio = 9
; rlimit-rttime = 1000000
; default-sample-format = s16le
; default-sample-rate = 44100
; alternate-sample-rate = 48000
default-sample-channels = 6
; default-channel-map = front-left,front-right
default-fragments = 8
default-fragment-size-msec = 10
; enable-deferred-volume = yes
deferred-volume-safety-margin-usec = 1
; deferred-volume-extra-delay-usec = 0
In conjunction with installation of other USB devices on Ubuntu it is sometimes mentioned that /etc/modules has to be extended with a line telling the kernel to load drivers or something. Currently /etc/modules just contains two lines:
> cat /etc/modules
lp
rtc
See "card2" in the end. I guess this is again my Trust device:
> sudo aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Device [USB Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
It seems like the device was detected (as above transcripts show) but Pulse didn't recognize it.
Then I executed:
and now it works - even when the device has not been plugged-in prior to booting.
At the end of the day its worth giving above two commands a try and see if that does the trick already.