Virtual terminals - no VISIBLE I/O

[Jon LaBadie]

On Fedora 32 Workstation.

My VTs are functional but there is not visible indication
of I/O.  By that I mean, I get no login or password prompt.
But I can blindly login.  I get no shell prompt.  But I
can blindly enter commands that run but they show no output
in the VT.

The VT system is controlled by systemD.  After a boot and upon
graphical login this is the status:

$ systemctl | grep getty

system-getty.slice        loaded active active    system-getty.slice                                                           
  getty.target              loaded active active    Login Prompts

A "ps -ef | grep getty" gives no output

After I try to access VT #3 (<Ctl><Alt><Fn3>) without logging in,
I get an additional line from the above command:

[e-mail]        loaded active running   Getty on tty3

And the ps pipe gives this:

root  4237  1  0 13:23 tty4  00:00:00 /sbin/agetty -o -p -- \u --noclear tty3 linux

I didn't think the display manager would affect the VT system, but
just in case I tried gdm, sddm, lightdm.  No differences.

Any clue as to why there seems to be no video connection to the VTs?

Jon

Hi

On Tue, 25 Aug 2020 13:40:19 -0400 Jon LaBadie wrote:
> My VTs are functional but there is not visible indication
> of I/O.  By that I mean, I get no login or password prompt.
> But I can blindly login.  I get no shell prompt.  But I
> can blindly enter commands that run but they show no output
> in the VT.

I have seen that a few years ago with an nvidia Quadro graphic card.

A workaround was to add to the kernel cmdline: vga=791
to force a VT resolution of 1024x768

Note that this vga= option is now replaced by grub options like
GRUB_GFXMODE...