Window 8 in efi mode and Ubuntu in legacy bios mode

[Jim Byrnes]

On 10/23/2013 05:36 AM, Tom H wrote:
> On Tue, Oct 22, 2013 at 6:21 PM, Jim Byrnes <jf_byrnes at comcast.net> wrote:
>>
>> I haven't actually tried to install Ubuntu yet. I have been holding off and
>> gathering info, hoping to improve my chances of success. However if I do not
>> disable efi and add nomodeset the live dvd ends at a black screen.
>
> Is it a problem with brightness? Is the Live disk fully booted but the
> screen too dark for you to see the login/desktop?

I don't think so, but I can't say so with certainty.

> How about booting with "noacpi"? Or with "acpi_backlight=vendor"?

I haven't tried that yet but will do so if a couple of other things I am 
going to try fail.

I have now actually installed Ubuntu and rebooted. If I enable efi I can 
boot Win 8 directly, ie no dual boot menu.  If I disable efi and enable 
csm it tries to boot Ubuntu directly but fails leaving me at a black 
screen. Very early in the booting process I see a message at the top of 
the screen. The first line says something about a microcode failure and 
a file name with amd in it. The second line says kvm disabled by bios. 
It is only on the screen so briefly I can't read it all.

I burned the boot-repair cd last night and will see if that helps today.

Regards,  Jim