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uboot

The openwrt uboot for qi_lb60 (made in nixpkgs using this tarball and applying these patches) is built with these BOOTARGS, as in package/uboot-xburst/files/include/configs/qi_lb60.h:

#define CONFIG_BOOTARGS     "mem=32M console=tty0 console=ttyS0,57600n8
ubi.mtd=2 rootfstype=ubifs root=ubi0:rootfs rw rootwait"
#define CONFIG_BOOTARGSFROMSD   "mem=32M console=tty0 console=ttyS0,57600n8
rootfstype=ext2 root=/dev/mmcblk0p1 rw rootwait"
#define CONFIG_BOOTCOMMAND  "nand read 0x80600000 0x400000 0x200000;bootm"
#define CONFIG_BOOTCOMMANDFROMSD    "mmc init; ext2load mmc 0 0x80600000
/boot/uImage; bootm"

xiangfu mentioned on irc that they have two utilities in their openwrt to write the setenv for the uboot.

linux

The kernel (original 2.6.35 + openwrt patches) is set to run /etc/preinit, as the generic openwrt patch says:

-       run_init_process("/sbin/init");
-       run_init_process("/etc/init");
-       run_init_process("/bin/init");
-       run_init_process("/bin/sh");
+       run_init_process("/etc/preinit");

power on

As wpwrak told me on irc, if the system is without power for a long time (> 30s), it will always start on connecting power. If it has been disconnected for a short time (~2s), it will not start immediately, and you will need to press the power button to start it.