Wait... I'm a noob and I'm a bit confused
if the kernel source has been locked so how doom kernel was made??
(I was thinking the kernel source has always been available but no one cares about z1's stock-based kernel)
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v2.5 works fine so far, but unfortunately when I enter the settings, the settings app is blank for ca. 3 - 5 sec., and then fc. Wipe cache/dalvik then, but without success. After that, wipe cache/dalvik and wipe system, followed by installing the ...
There is a missing " in this line
adb shell "chmod 777 /data/local/tmp/giefrootlog
and a small typo "Please for the device to reboot"
You can root with giefroot (works in some versions) backup TA partition and then unlock.