Ubuntu 9.04 - No Audio on HP Pavilion tx 2500 ?

I installed Ubuntu 9.04 on my brand new HP Pavilion tx2500 laptop and I got many troubles. Here I focus only on the sound problem that I faced. After installing Ubuntu I expected to see some troubles like not working touch screen...etc but there was an unexpected trouble too. It was my laptop had no sound. It shows that audio is working but actually my laptop was silent.
Before moving to find solutions to expected troubles I thought to resolve this issue immediately. So I searched Internet and found a solution in an Ubuntu Forum.
To achieve sound in my laptop I had to fix sound with a name of another laptop brand.

The sound fix is well known. To the file "/etc/modprobe.d/alsa-base" you have to add the following line at the bottom:

Code:

options snd-hda-intel index=0 model=toshiba position_fix=1

Then restart.

After rebooting it worked perfectly. And also I could try this code : options snd-hda-intel index=0 model=acer
But I succeeded with the first code so I dint try this acer code.
This practice thought me one thing that if you are a Linux user you don't get everything on a tray but if you try you can do what ever you want. Hence as a Linux user you have to go miles further than windows GUI user.