[OE-core] runqemu nographic and hvc0

[Andre McCurdy]

On Thu, Mar 12, 2020 at 9:13 AM Khem Raj <raj.khem at gmail.com> wrote:
> On 3/12/20 8:21 AM, Marko, Peter wrote:
> > Hi,
> >
> > I'm trying to boot my own qemu image on zeus branch with "runqemu nographic /path/to/extracted/rootfs" but I have problem that console is flooded with
> > process '/sbin/getty 115200 hvc0' (pid 383) exited. Scheduling for restart.
> > starting pid 385, tty '': '/sbin/getty 115200 hvc0'
> > I'm using yocto qemuarm kernel and qemuarm machine (but it's the same with qemuarm64).
> >
> > Basically qemuarm machine has
> > SERIAL_CONSOLES ?= "115200;ttyAMA0 115200;hvc0"
> > which is transferred to /etc/inittab, however hvc0 device does not exist after booting in nographic mode.
> >
> > What kind of configuration am I missing in my image?
> > I think that might be the graphic console which does not exist in nographic mode?
>
> that is correct
>
> > Is there a way to get rid of this problem without breaking graphic mode console?
>
> I did not find one, it particularly happens with busybox init.

I don't know what the proper fix is, but changing SERIAL_CONSOLES to
"115200;ttyAMA0" avoids the issue.

I've changed the machine config directly but you could probably also
use the _qemuarm over-ride to set SERIAL_CONSOLES from local.conf,
etc, e.g.:

  SERIAL_CONSOLES_qemuarm = "115200;ttyAMA0"