Date: Thu, 19 Nov 2015 12:09:45 +0100 From: Emmanuel Vadot <manu@bidouilliste.com> To: freebsd-hackers@freebsd.org Subject: boot1.efi and ConsoleControl on HP 840G1/G2 Message-ID: <20151119120945.71d0cb068006398d3a556559@bidouilliste.com>
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Hello Hackers, After hours I've found why I couldn't use properly FreeBSD on my HP 840G1/G2 laptop. What is happening right now with -current is that the kernel framebuffer is garbage (https://www.bidouilliste.com/images/efi/IMG_2650.JPG). The problem is that boot1.efi calls ConsoleControl which, from my findings, is not in the UEFI specs but was only in the EDK implementation. This should not be a problem as LocateProtocol should return != EFI_SUCCESS but on my laptops (and probably others) this is not the case. After removing the ConsoleControl related lines and recompiling boot1.efi I can now boot FreeBSD. I'm pretty sure that this would not be a problem on other machine (with the patch I can still boot correctly FreeBSD on my Samsung 870Z laptop) but I would prefer that other people test it. I've opened a bug on bugzilla (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204674) if some people want to try the patch. Cheers, -- Emmanuel Vadot <manu@bidouilliste.com>
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