[xpost,repost] VGA false positive in dmesg?

[Eugene Grosbein]

04.08.2020 18:37, Ottavio Caruso via freebsd-hackers wrote:

>>>> You can also try adding to /boot/loader.conf:
>>>>
>>>> hint.vtvga.0.disabled=1
>>>
>>> This doesn't seem to work:
>>>
>>> oc at FreeBSD:~ % cat /boot/loader.conf
>>> hint.vtvga.0.disabled=1
>>> oc at FreeBSD:~ % dmesg | grep -i vga        VT(vga): text 80x25
>>> vtvga0: <VT VGA driver> on motherboard
>>> vga0: <Generic ISA VGA> at port 0x3b0-0x3bb iomem 0xb0000-0xb7fff pnpid PNP0900 on isa0
>>> VT(vga): text 80x25
>>> vga0: <Generic ISA VGA> at port 0x3b0-0x3bb iomem 0xb0000-0xb7fff pnpid PNP0900 on isa0
>>
>> But is this device used? See output of conscontrol(8) and look for ttyv0
> 
> oc at FreeBSD:~ % conscontrol list
> Configured: ttyu0
>  Available: ttyu0,ttyv0
>     Muting: off
> 
> 
> I'm a bit confused here. Do both ttyu0 and ttyv0 refer to the serial console?

No, only ttyu0 is (serial) comconsole; ttyv0 is vidconsole.
ttyv0 is available but not configured to serve as system console.

> Do I need ttyv0?

Not necessary.

> Is it safe to comment ttyv0 in /etc/ttys?

Yes, if you already verified that serial console works as expected.