Originally Posted by aditya3098
Yes, I can get into diags. Is the option I should use "Install fastboot bundle"
The kindle is touchy about dropping out of fastboot mode if there is any interruption in the USB connection, such as when switching from windows to linux. Setting the bootmode var to fastboot prevents that problem by making the kindle boot directly into fastboot mode. The downside is that you need fastboot working to get out of fastboot mode.
In theory, we should be able to flash a kernel from diags SSH with "dd" by only writing to the part of /dev/mmcblk0 that contains the kernel. You could try that if you feel brave today.