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Date:      Sun, 22 Jan 2017 17:49:52 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 201461] switching back to sc(4) or vt(4) console fails with nvidia.ko
Message-ID:  <bug-201461-8-xX2g6c5U4N@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-201461-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-201461-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D201461

--- Comment #17 from Matthew Fioravante <fmatthew5876@gmail.com> ---
I'm getting this issue as well, but perhaps I can shine some light on the
cause.

I've got a GeForce GT 710B. I'm on 11.0-RELEASE-p2 using nvidia-driver vers=
ion
367.44_3.

I had my system running in BIOS legacy mode before, and everything worked f=
ine.
I was using the nvidia-modeset.ko module and I was able to switch between
console and X, stop X, restart X, etc..

I rebuild the system to boot using uefi and I've switched the BIOS to run in
EFI mode for everything. I did this in order to try to solve a different
problem.

Now I have this same issue as the bug reporter. As soon as I start X, I am =
no
longer able to switch to the text consoles. Nor am I able to switch back to=
 X.
The screen turns black.

This is likely some issue with efi framebuffer the nvidia driver. Maybe
incompatibilities in the framebuffer. Maybe its some issue with enumerating
/selecting pci devices, as that information would certainly be different co=
ming
from BIOS vs EFI.

I've attached my nvidia-bug-report.sh output.

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