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Re: [Qemu-devel] [PATCH] display: stop using DT_NOGRAPHIC, use DT_NONE

From: Michael Tokarev
Subject: Re: [Qemu-devel] [PATCH] display: stop using DT_NOGRAPHIC, use DT_NONE
Date: Fri, 28 Jun 2013 15:50:49 +0400
User-agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:10.0.12) Gecko/20130116 Icedove/10.0.12

28.06.2013 15:45, Andreas Färber пишет:
> Am 28.06.2013 13:29, schrieb Michael Tokarev:
>> 28.06.2013 15:24, Peter Maydell wrote:
>>> ...in particular I don't think "-display none" should
>>> mean "don't allow ctrl-c" (though -nographic should
>>> continue to have that effect), and this patch currently
>>> introduces that behaviour change.
>> As Anthony said before, -nographic is legacy.  So there should
>> be some more modern way to control this.  That's exactly the
>> change which I don't like myself.  
>> But "don't allow ctrl-c"
>> which is currently bound to -nographic is equally wrong.
> What's wrong about that? Isn't Ctrl+C passed through to the guest in
> -nographic mode? I don't see how any other mode inclusing daemonize
> would need that.

Um. With either -nographic or -display none, there's no "display"
per se, and it is the "display" who relays keypresses and such into
guest.  Without display, the guest becomes headless completely, not
only it does not have a monitor of a video card, but also does not
have keyboard or mouse or other similar stuff.  Or it may have these,
but you can't "touch" neither keyboard nor mouse because you don't
"see" them without a display.  Fun thing but here we go.

This ctrl+c handling is only about when you explicitly redirected
some other char device to guest, such as serial port.  Which don't
have much to do with display I think, hence I don't understand the
logic here.



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