Hello, I have bisected the boot failure of a Lenovo Thinkpad X1 Carbon to the merge ea4ebd1cb093c8ec5d7f4bf9070dc444184c3971. What I call "boot failure" refers to the fact that no console is shown, the machine only reads from the disc for a very short time, and the machine does not respond to Ctrl-Alt-Del, etc.
As it turns out reverting e696c68363740d3a8fe495e353de3ff26b86257a (Input: serio - fix sysfs layout) on top of v3.13 makes the machine boot again. So far I have now clue how this commit can affect early boot / showing of the console. Does it ring any bells for you? Please find the .config used attached. Best Regards, Jens
config3.13.gz
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