I have a new Dell XPS 9100 with 9GB ram and ATI Radeon HD 5770 1024MB GDDR5.
I installed a dual boot with Windows 7 and Ubuntu 64bit. Sound worked fine with
the Windows 7, but no sound with Ubuntu. Did a reinstall with just Ubuntu 64 bit (wiping out the Windows 7). No sound.
I first did:
System -> Administration->System Testing
(testing only for sound). I get:

0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xfbbf4000 irq 22
1 [Generic ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xfbefc000 irq 17


Next I followed: "Comprehensive Sound Problem Solutions Guide v0.5e"


(1) aplay -l

I get:

*** List of PLAYBACK Hardware Devices ***

card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 3: ATI HDMI [ATI HDMI]
Subdevices: 1/1
subdevice #0: subdevice #0

(2) lspci -v

I get

Kernel driver in use: r8169
Kernel modules: r8169

03:00.0 VGA compatible controller: ATI Technologies Inc Juniper [Radeon HD 5700 Series]
Subsystem: ATI Technologies Inc Device 2543
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at fbec0000 (64-bit, non-prefetchable) [size=128K]
I/O ports at e000 [size=256]
Expansion ROM at fbea0000 [disabled] [size=128K]
Capabilities: <access denied>

03:00.1 Audio device: ATI Technologies Inc Juniper HDMI Audio [Radeon HD 5700 Series]
Subsystem: ATI Technologies Inc Juniper HDMI Audio [Radeon HD 5700 Series]
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at fbefc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel

(3) went to http://www.alsa-project.org/alsa-doc/
Under ATI I get:

Soundcard List for ATI
Product Chipset(s) Driver & Docs Tags, Notes
ATI-IXP southbridge AC97 audio

IXP SB150
IXP SB200
IXP SB250
IXP SB300
IXP SB400
Details [PCI] [ANALOGio]
ATI-IXP southbridge AC97 modem

IXP SB150
IXP SB200
IXP SB250
IXP SB300
IXP SB400
Details [PCI] [ANALOGio]
ATI-IXP southbridge HD-audio and modem

SB450
Details [PCI]

Matrix:Soundcard-Tags

Don't see the ATI HD 5700. I guess this is "Failure."

Under Intel I get:

Soundcard List for Intel
Product Chipset(s) Driver & Docs Tags, Notes
ICH southbridge AC97 audio

440MX
i810
i810E
i820
ICH4
ICH5
ICH6
ICH7
Details [PCI] [Sample16bit] [48kHz]
ICH southbridge AC97 modem

440MX
i810
i810E
i820
ICH4
ICH5
ICH6
Details [PCI] [Sample16bit]
ICH southbridge HD-audio and modem

ICH6
ICH6M
ICH7
ESB2
Details [PCI]

Matrix:Soundcard-Tags

I guess this is also "Failure"?

Not sure what to do next....

Help would be greatly appreciated.
(I'm barely computer literate.)

Thanks in advance ...