FreeBSD-12.1 on laptop

[vm finance]

I can't even get to any prompt, except loader prompt.
Is there a way to undo the change from loader prompt?

Thanks

On Thu, Nov 28, 2019 at 7:47 AM vm finance <vm.finance2 at gmail.com> wrote:

> I tried to add
>      hw.syscons.disable=1
> to /boot/loader.conf but it stalls the system during bootup....
>
> On Thu, Nov 28, 2019 at 5:34 AM Kurt Hackenberg <kh at panix.com> wrote:
>
>> On 2019-11-27 13:33, vm finance wrote:
>>
>> > I had to comment out this exact line to get my system to boot
>> successfully.
>> > I actually have "Pro-level NVIDIA® Quadro® P500 graphics" on my P52S
>> > Thinkpad.
>> > Not sure if 12.1 has native support for this, or do I need to
>> > download/build this.
>> >
>> > Per the discussions on this topic, I think I should stay away from pkg
>> > ..drm-kmod
>> ...
>> >> kld_list="/boot/modules/i915kms.ko"
>> ...
>> >>> However startx is still failing - same framebuffer error.
>>
>> All right, a few things are going on.
>>
>> It's true that to use any drm-kmod on 12.1, you have to compile it, so
>> it matches the kernel. (Those packages are compiled for 12.0, and
>> something changed in the kernel.)
>>
>> The framebuffer thing might be this: both versions of the AMD drm-kmod
>> (modules amdgpu and radeon) interfere with the EFI framebuffer. This bug
>> has not yet been tracked down. You can work around it by shutting off
>> the system console during boot, by adding this to /boot/loader.conf:
>>      hw.syscons.disable=1
>> There will be a system console after the drm-kmod driver is loaded and
>> takes over. However, this is only a problem with UEFI boot;
>> old-fashioned boot doesn't use that EFI framebuffer (I think it uses a
>> VGA framebuffer instead). And it's never a problem with the Intel
>> drm-kmod (i915kms), no matter how you boot.
>>
>> But neither of those drivers, Intel or AMD, applies to your Nvidia
>> graphics processor. Nvidia writes drivers for their GPUs, but apparently
>> does not give out source code, only binaries. I don't know whether
>> FreeBSD distributes those binaries.
>>
>> But it's possible that your laptop computer has two graphics processors.
>> Some do, apparently. That happens when the computer uses a main
>> processor that has a graphics processor included in the package, and
>> also has a separate graphics processor. I don't know why manufacturers
>> do that.
>>
>> But maybe you can get by without any GPU driver, which means not using
>> the graphics processor. Instead, graphics is done by software on the
>> main processor, which is slower. That may or may not be fast enough. If
>> your computer works, runs X and everything, without loading any graphics
>> driver, maybe that's OK.
>>
>> Some documentation:
>> https://freebsddesktop.github.io/
>> https://wiki.freebsd.org/Graphics
>> https://github.com/FreeBSDDesktop/kms-drm
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>