Whenever I install ubuntu (i have the 64 bit version) on my AMD64 comp, after it reboots and ejects the cd, while "installing packages" it crashes to a grey screen full of text that says things like [ 505.581530] CR2: 000000002a3ab170 If I reboot, it starts, and tells me (only once) that not all packages installed correctly... then i can login normally... but if I try to run synaptic, or apt-get it gives me the error about the directory being locked (the same one u get if u run apt-get while synaptic is running) I have used 2 different burns of the ISO i have for it, and the md5 of the iso is correct. Also, if I use expert mode when installing and use a different kernel, it freezes when installing packages at 85%... no errors. Pls help