Two years passed with No network on x86-64 saga mainly due to skge inability to work above 4GB RAM support. With the help of kernel team, it turned out the solution was simple. # rmmod skge # modprobe skge dma_bits=32 Where 32 is the max value for 4GB address space. It might be late for people who have already replaced their Gigabyte GA-K8NSC-939 motherboard but the issue can be finally put to rest.