yong 
Hi. I have a boot error that I dont know why. I built my own bootloader(uboot) and kernel in ubuntu 11.10(android). And I burn them into my sd card and I tested it in my tiny6410 and they work file. So, next thing is to try with filesystem. I build ubi filesystem , save in sd card, but I got error when I boot. There is no error message. The board show the black penguine and it suddenly shut off with white screen and restart again and again. ################### Android #################### Android-BootLoader = Android/u-boot.bin Android-Kernel = Android/zImage Android-CommandLine = root=ubi0:FriendlyARM-root ubi.mtd=2 rootfstype=ubifs init=/linuxrc console=ttySAC0,115200 androidboot.console=s3c2410_serial0 Android-RootFs-InstallImage = Android/rootfs_qtopia_qt4.ubi Android-RootFs-RunImage = Android/rootfs_qtopia_qt4.ext3 I tested with original Android-RootFs-InstallImage = Android/rootfs_android-mlc2.ubi and it works file so my own build ubi filesystem has the error. I build ubi image with mkubimage-mlc2 rootfs_android rootfs_qtopia_qt4.ubi. I tested my own built rootfs_dir and provided source from cd but both didnt work. any ideas?