Hi, I m now trying to boot the powerpc board using a monta vista carrier grade linux of kernel version 2.6.21. Its getting hanged after printing the line "Loading device tree...OK".However,I have already been successful in booting the same powerpc board using the main line kernel linux kernel version 2.6.23 and 2.6.24.I have changed the device tree file according to my hardware interface and tested.but the result is same.i.e getting hanged after "Loading device tree...OK" I also debugged in u-boot and it is successful in transfering the control to linux.I am not sure about the where its getting lost after coming into kernel.I also put some printk in the early kernel functions such as early_init and probe machine.But it didnt get printed. I have checked serial port baud rate at u-boot end also.I have also checked the serial port signals at the time of hanging.There was no output in the serial port at the time of hanging. What could be the issue?please help me in this regard. -Viswanathan M -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.linux-foundation.org/pipermail/lf_carrier/attachments/20100718/da4202bc/attachment.htm