I cannot tell by your post what OS you are using. If it is an old AR750s, per this post you can only use Windows.
Several people have reported that by trying a different system, that uboot magically worked for them.
I cannot tell by your post what OS you are using. If it is an old AR750s, per this post you can only use Windows.
Several people have reported that by trying a different system, that uboot magically worked for them.