I set up Ubuntu 12.04 on a similar machine and used the same GTX 570 and do not get the cuMemcpyDtoH() 700 error.
For this build, I installed the CUDA Toolkit
cuda_5.0.35_linux_64_ubuntu11.10-1.run
with included
NVIDIA Accelerated Graphics Driver for Linux-x86_64 304.54
Something that's also worth mentioning is that I used the latest oclHashcat-plus v0.13. On the Ubuntu 10.04 machine, I was using oclHashcat-plus v0.12. So, I'm not sure if something was fixed in the v0.13 release that would have fixed the 700 error.
Everything works great!
For this build, I installed the CUDA Toolkit
cuda_5.0.35_linux_64_ubuntu11.10-1.run
with included
NVIDIA Accelerated Graphics Driver for Linux-x86_64 304.54
Something that's also worth mentioning is that I used the latest oclHashcat-plus v0.13. On the Ubuntu 10.04 machine, I was using oclHashcat-plus v0.12. So, I'm not sure if something was fixed in the v0.13 release that would have fixed the 700 error.
Everything works great!