Hello Matt,
I have just gone through a brutal week of kernel bisections, and found that the following refactoring breaks display output on my device:
commit 9479c7cebfb568f8b8b424be7f1cac120e9eea95
Author: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
Date: Fri Feb 26 21:22:05 2016 +0000
efi: Refactor efi_memmap_init_early() into arch-neutral code
The problem is that the screen stays black and there is no modeset flash.
After my bisection showed up this commit, a quick Google for the message turned up:
https://bugzilla.kernel.org/show_bug.cgi?id=197895
via
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1730069
which confirms that there's other hardware beyond my Chromebook Samsung 500C that suffers from this regression.
Both machines are x86_64.
Do you know what might be going wrong here?
I have no experience with EFI related kernel code but have the device around and can test patches, if that helps.
Best,
Niklas
PS:
I've also taken the liberty to CC the people that were on CC in the patch in case that helps with their work.
