Had sound, now I don't have any. 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset

Here's my full LSPCI dump (Audio device hilighted):
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00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
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       00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
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00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5)
00:1c.6 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 7 (rev b5)
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5)
00:1d.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Z68 Express Chipset Family LPC Controller (rev 05)
00:1f.2 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family 4 port SATA IDE Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
00:1f.5 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family 2 port SATA IDE Controller (rev 05)
02:00.0 Multimedia controller: Philips Semiconductors SAA7160 (rev 03)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
04:00.0 USB Controller: Etron Technology, Inc. EJ168 USB 3.0 Host Controller (rev 01)
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On my first few boots of Ubuntu I had no problem with sound. Now all of a sudden I don't have any sound. When I use the mixer, I find I only have one dummy channel (literally called "Dummy").

Going through some soundcard diagnostics problem, I found I didn't have a /proc/asound/ directory, even though I have the "asound" package installed. I tried MAKEDEV with audio, but got no results from rebooting either.

I ran the alsainfo script and got this result: http://www.alsa-project.org/db/?f=1d4acfa1e851c962795c6d9ffaed271002c27d4f.

!!!! IMPORTANT !!!!
Again, I did have sound the first few times I booted up my computer. At one point Ubuntu uninstalled sound drivers because they supposedly weren't used anymore. Maybe that's the problem? Is there a way I can find out what I uninstalled?