Disappearing userland output with -current

[Ivan Voras]

Gary Jennejohn wrote:

> The symptom is that _all_ userland output disappears, which makes it
> rather difficult to do anything. I'm forced to reboot the box until
> the boot output isn't trashed.
> 
> If I break into ddb then all the output becomes visible, but leaving
> ddb then results in no userland output appearing again.

Do you use vidcontrol to set different video mode?

How exactly does "output disappear"? Does the screen go blank? Does the 
console just stop outputting characters?

Why do you say "userland output"? Do kernel messages appear? (You can 
check this by e.g. inserting a USB memory stick in the machine).

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