I have the same problem with Ubuntu 10.04 64-bit, kernel 2.6.32-22-generic, fully updated + HP Probook 4510s, Celeron(R) Dual-Core CPU T3000 @ 1.80GHz, Mobile Intel Graphics Media Accelerator 4500MHD integrated graphics, Product Code VQ540EA#AKB.
I have the same problem with Ubuntu 10.04 64-bit, kernel 2.6.32-22-generic, fully updated + HP Probook 4510s, Celeron(R) Dual-Core CPU T3000 @ 1.80GHz, Mobile Intel Graphics Media Accelerator 4500MHD integrated graphics, Product Code VQ540EA#AKB.