ATI Radeon 4650 HD audio controller clash
I bought an ATI Radeon HD 4650 graphics card recently, but since i installed it, Ubuntu won't play any sounds. Amarok with xine as the engine says it it couldn't initialise any audio devices - device busy, and with yauap, or in any other audio application, it says "Invalid arguement"
I have no idea what the invalid arguement error could mean (other than it doesn't recognise an arguement), and i don't see why the audio device would be busy. Since it's only done it since i installed the graphics card, i think its the onboard audio controller clashing with it. I've tried disabling it in the BIOS, but linux still saw it. I also tried rearranging the IRQs, but that didn't work either.
Thanks in advance,