Here's some helpful info:
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andrew@andrew-Vostro-410 ~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC888 Analog [ALC888 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
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andrew@andrew-Vostro-410 ~ $ lspci
00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 02)
00:01.0 PCI bridge: Intel Corporation 82G33/G31/P35/P31 Express PCI Express Root Port (rev 02)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02)
00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02)
00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02)
00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 02)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92)
00:1f.0 ISA bridge: Intel Corporation 82801IR (ICH9R) LPC Interface Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 4 port SATA Controller [IDE mode] (rev 02)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)
00:1f.5 IDE interface: Intel Corporation 82801I (ICH9 Family) 2 port SATA Controller [IDE mode] (rev 02)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV620 LE [Radeon HD 3450]
01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI RV620 HDMI Audio [Radeon HD 3400 Series]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
04:01.0 Serial controller: Oxford Semiconductor Ltd OX16PCI952 (Dual 16950 UART)
04:01.1 Parallel controller: Oxford Semiconductor Ltd OX16PCI952 Integrated Parallel Port
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andrew@andrew-Vostro-410 ~ $ lsmod
Module Size Used by
pci_stub 12550 1
vboxpci 22867 0
vboxnetadp 25636 0
vboxnetflt 27232 0
vboxdrv 252270 3 vboxpci,vboxnetadp,vboxnetflt
bnep 17707 2
rfcomm 37276 4
bluetooth 183228 10 bnep,rfcomm
binfmt_misc 17260 1
snd_hda_codec_hdmi 31423 1
snd_hda_codec_realtek 63356 1
snd_hda_intel 32515 7
snd_hda_codec 111547 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13272 1 snd_hda_codec
snd_pcm 80163 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
coretemp 13168 0
radeon 820703 2
snd_seq_midi 13132 0
snd_rawmidi 25382 1 snd_seq_midi
snd_seq_midi_event 14475 1 snd_seq_midi
kvm_intel 126745 0
snd_seq 51255 2 snd_seq_midi,snd_seq_midi_event
kvm 357806 1 kvm_intel
ttm 75534 1 radeon
snd_timer 24411 2 snd_pcm,snd_seq
snd_seq_device 14137 3 snd_seq_midi,snd_rawmidi,snd_seq
drm_kms_helper 45271 1 radeon
drm 230463 4 radeon,ttm,drm_kms_helper
snd 61991 24 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
ppdev 12817 0
soundcore 14599 1 snd
microcode 18209 0
dcdbas 14054 0
psmouse 84843 0
parport_pc 31968 1
snd_page_alloc 14036 2 snd_hda_intel,snd_pcm
i2c_algo_bit 13197 1 radeon
serio_raw 13031 0
lpc_ich 16925 0
mac_hid 13037 0
lp 13299 0
parport 40753 3 ppdev,parport_pc,lp
hid_generic 12445 0
usbhid 41702 0
hid 82142 2 hid_generic,usbhid
r8169 55976 0
floppy 55444 0
usb_storage 39350 0
sudo aptitude --purge reinstall linux-sound-base alsa-base alsa-utils linux-image-`uname -r` linux-ubuntu-modules-`uname -r` libasound2
I've rebooted several times. Any ideas? What are my next steps?
Thanks!