Re: No console anymore. How to figure this out.

Michael <[email protected]> Mon, 16 Mar 2026 15:30:33 +0000
Newsgroups	gmane.linux.gentoo.user
Message-ID	<4722622.LvFx2qVVIh@rogueboard>
On Monday, 16 March 2026 14:56:49 Greenwich Mean Time Dale wrote:
> On 3/16/26 5:16 AM, Michael wrote:
> > Your console device needs the nvidia-drm.ko module to be able to use
> > nvidia's own kernel modesetting framebuffer functionality
> > (modesetting=1).
> > 
> > What I think is happening:  your EFI framebuffer is providing the
> > initial console display during boot, then it switches over to
> > nvidia-
> > drm.
> > 
> > I suspect your problem manifests at the handover from kernel to
> > nvidia's module, or vice-versa, when you try to go back to a
> > console.  However, I haven't used nvidia for decades now and have
> > not kept up with their current driver's functionality to know with
> > any certainty how this is meant to work.
> > 
> > What does dmesg report at boot and thereafter when you switch to a
> > console?
> > 
> > Can you grep your running kernel's for 'DRM', to see if anything
> > incompatible has been enabled/disabled?
> > 
> > What does 'lsmod | grep nvidia' come up with?
> > 
> > Also, 'modinfo nvidia-drm'?
> > 
> > PS. I assume your have re-emerged your nvidia driver to match the
> > kernel you are now running.
> 
> That's my thinking to, the last part.  I didn't think about the first
> part.  LOL  This is lsmod.  The drm part is loaded as is modeset.
> 
> 
> root@Gentoo-1 / # lsmod
> Module                  Size  Used by
> nvidia_uvm           1814528  2
> nvidia_drm            118784  40
> nvidia_modeset       1875968  161 nvidia_drm
> nvidia              110895104  2122 nvidia_uvm,nvidia_modeset
> root@Gentoo-1 / #
> 
> 
> 
> So it appears the modules are loaded but not all are working.  I
> guess???  Here's the other info.
> 
> 
> 
> root@Gentoo-1 / # modinfo nvidia-drm
> filename:       /lib/modules/6.12.31-gentoo/video/nvidia-drm.ko
> version:        580.142
> supported:      external
> license:        MIT
> srcversion:     7C9FF03229E79984059FE07
> alias:          pci:v000010DEd*sv*sd*bc06sc80i00*
> alias:          pci:v000010DEd*sv*sd*bc03sc02i00*
> alias:          pci:v000010DEd*sv*sd*bc03sc00i00*
> depends:        nvidia-modeset
> name:           nvidia_drm
> retpoline:      Y
> vermagic:       6.12.31-gentoo SMP preempt mod_unload
> parm:           modeset:Enable atomic kernel modesetting (1 = enable,
> 0 = disable (default)) (bool)
> parm:           fbdev:Create a framebuffer device (1 = enable
> (default), 0 = disable) (bool)
> root@Gentoo-1 / #
> 
> 
> 
> Yes, I did rebuild the nvidia drivers however, I'm still on the same
> kernel.  Been using the current kernel for ages now.  I think since
> shortly after I built this rig.  The kernel we were trying to adjust
> never would finish the make process, compile I guess.
> 
> Does anything there give a clue?  Could it be the nvidia drivers have
> a bug, in both versions in the tree?  My card is older but I can't be
> the only one that uses a card like that.  Of course, some people that
> use a GUI rarely switch to a console.  So, it could be a bug that no
> one else has noticed I guess.  Unless you or someone else has some
> more ideas to check.

Your modesetting is disabled, nvidia's FB is enabled.  As I suggested 
you can check dmesg for errors as you switch over to tty1.

You haven't yet showed 'grep DRM .config' of your running kernel.
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