Originally Posted by macken

Sorry, I dont mean to ignore your suggestion. I am pretty new to Linux system and I dont have any idea how to check those things and set them up in 770 without detail instruction (yes I know I should learn more linux skill)

Originally Posted by fanoush

From your first post it looked like you can run dmesg command and gain root so I guessed you are up to this task. Well as I said I haven't this tested I only know what system does on boot. linuxrc file contains this

Code:

FS_MODULES="ext2 jbd mbcache ext3"
USB_HOST_MODULES="ohci-hcd usbhid usbnet usbserial scsi_mod sd_mod \
                  usb-storage pl2303 net1080 cdc_ether asix"
MODULE_PATH=/lib/modules/current

Code:

load_usb_host_modules()
{
        for mod in $USB_HOST_MODULES $FS_MODULES ; do
                if [ -f $MODULE_PATH/$mod.ko ]; then
                        insmod $MODULE_PATH/$mod.ko
                fi
        done
}

Code:

usb_host_mode=$(cal-tool --get-usb-host-mode 2> /dev/null)
if [ "$usb_host_mode" = "enabled" ]; then
        echo "USB host mode enabled"
        load_usb_host_modules
        echo host > /sys/devices/platform/tahvo-usb/otg_mode
else
        echo peripheral > /sys/devices/platform/tahvo-usb/otg_mode
fi

this means you need to do the same thing as this script which may mean inserting those modules in shell by hand by running something like this as root (should be enough for usb disk)

Code:

insmod /mnt/initfs/lib/modules/current/ohci-hcd.ko
insmod /mnt/initfs/lib/modules/current/scsi_mod.ko
insmod /mnt/initfs/lib/modules/current/sd_mod.ko
insmod /mnt/initfs/lib/modules/current/usb-storage.ko

or writing similar script and running it.

And then enabling the host mode via echo command.

But as you said you want to attach camera and don't have driver, it may be a bit pointless anyway :-)

Originally Posted by macken

Thank you so much, its very kind of you giving me this information.

Originally Posted by macken

Currently I really dont have the camera driver yet but I will have one soon. At the moment I only want the n770 detect the usb hub first.

Originally Posted by convulted

One other thing. I am not an expert in any IT or electronics related field, but from my own post-mortem of the WSOD I suffered I have come to the following conclusion: Windows XP + vmWare workstation 5 + Ubuntu + Flasher = bad idea. For some reason vmWare throws a blue screen of death (heh) on XP whenever Flasher is used. This may cause the Windows PC to send some sort of signal on the USB lines, interrupting the rebooting of the 770 and causing a WSOD. This info does not really belong here I guess, but I just wanted to warn others so that they may not go through the same experience...