Hi. I think iv got the same problem with 13.04. I can use the kernel 3.5 but not the default kernel 3.8. Iv got the same laptop, but not the same graphic card: here it is an ATI.
lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV635/M86 [Mobility Radeon HD 3670]
Then it looks like it is not a problem with Nouveau. Unfortunatly i dont have skill to help you more.
Hi. I think iv got the same problem with 13.04. I can use the kernel 3.5 but not the default kernel 3.8. Iv got the same laptop, but not the same graphic card: here it is an ATI.
lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV635/M86 [Mobility Radeon HD 3670]
Then it looks like it is not a problem with Nouveau. Unfortunatly i dont have skill to help you more.