Re: [Qemu-discuss] VGA choices

[Vincenzo Romano]

What you say, Narcis, makes sense. And a lot of it.
I will make a few tests to "engineer" a stable solution with curses,
as VNC is already working out-of-the-box.
The main problem is to run a dozen of VMs each with its own
screen/tmux/byobu session and to be able
to select the right one.

With VNC, SSH and different loopback addresses this is trivial.

Thanks.

--
Vincenzo Romano - NotOrAnd.IT
Information Technologies
--
NON QVIETIS MARIBVS NAVTA PERITVS


2017-02-01 11:35 GMT+01:00 Narcis Garcia <address@hidden>:
> Any text display should be lighter than any graphic one.
> I got most of details from: 1 Documentation, 2 Lists&forums, 3 try and
> error.
>
>
> El 01/02/17 a les 10:48, Vincenzo Romano ha escrit:
>> Hi Narcis,
>>
>> Thank you for the extra details: the documentation is quite terse if
>> not insufficient.
>> I mean: https://qemu.weilnetz.de/doc/qemu-doc.html linked as the
>> official user manual from
>> http://wiki.qemu.org/Manual.
>>
>> According to your experience, which approach is the "lightest" among
>> "-display vnc" and "-ncurses"?
>>
>> Finally, may I ask you where did you pull these details from?
>>
>> Thanks again.
>> --
>> Vincenzo Romano - NotOrAnd.IT
>> Information Technologies
>> --
>> NON QVIETIS MARIBVS NAVTA PERITVS
>>
>>
>> 2017-02-01 9:23 GMT+01:00 Narcis Garcia <address@hidden>:
>>> -nographic cannot be combined with any other -display.
>>> As far as I know, Curses go to local stdout; you can see easily when you
>>> lauch Qemu from command line and, by intuition I supose that, (same as
>>> SDL) closing the stdout channel/terminal Qemu process can be closed too.
>>>
>>> You could launch Qemu process in a "screen" session, and attach remotely
>>> to it when you connect through SSH.
>>>
>>>
>>> El 01/02/17 a les 08:51, Vincenzo Romano ha escrit:
>>>> Thanks, Narcis.
>>>>
>>>> 2017-02-01 8:29 GMT+01:00 Narcis Garcia <address@hidden>:
>>>>> VNC is a protocol to connect to a GUI, not MDA/TXT.
>>>>> Independently of what guest OS does or shows, Qemu only outputs display
>>>>> through:
>>>>> - VNC (graphic)
>>>> Networked
>>>>
>>>>> - SDL (graphic)
>>>> Local to the host
>>>>
>>>>> - GTK (graphic)
>>>> Local to the host (maybe also networked with X11)
>>>>
>>>>> - Curses (text)
>>>> Local?
>>>>
>>>>> - none (no display)
>>>> None, indeed.
>>>>
>>>> My host is a headless server and I'd like to save all resources I can
>>>> from it to give them to the guests.
>>>> So I need remote access to the guests that I would like to do with
>>>> SSH, RDP or VNC
>>>> (the latter two with SSH tunnels).
>>>>
>>>> VNC seems to me a solution, but I couldn't find enough details about
>>>> the curses solution which
>>>> would be my preferred solution because of its low requirements.
>>>> Where is the ncurses output pushed to? A local PTY? A Unix socket?
>>>>
>>>> Why cannot I use -nographic with -daemonize (and VNC)?
>>>>
>>>>> El 31/01/17 a les 21:14, Vincenzo Romano ha escrit:
>>>>>> Hi.
>>>>>> Thanks for the feedback.
>>>>>>
>>>>>> I need to have a text mode console to the server via VNC (or actually
>>>>>> whatever else) in case the network is not working or to operate on the
>>>>>> BIOS and the boot loader.
>>>>>> And I would like to have such a thing as lean as possible to save
>>>>>> resources on the host.
>>>>>> As of now I am using "-vga virtio" that is a full blown VGA. I am
>>>>>> thinking about a PC with just 80x25 screen.
>>>>>>
>>>>>> --
>>>>>> Vincenzo Romano - NotOrAnd.IT
>>>>>> Information Technologies
>>>>>> --
>>>>>> NON QVIETIS MARIBVS NAVTA PERITVS
>>>>>>
>>>>>>
>>>>>> 2017-01-31 19:47 GMT+01:00 A. Wan <address@hidden>:
>>>>>>> On Tue, January 31, 2017 09:54, Vincenzo Romano wrote:
>>>>>>>> Sorry for the typo:
>>>>>>>>
>>>>>>>> BBC=VNC
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Il 31 gen 2017 18:48, "Vincenzo Romano" <address@hidden> ha
>>>>>>>> scritto:
>>>>>>>>
>>>>>>>> Hi all.
>>>>>>>> I need to create a number of VM to be used as Linux servers.
>>>>>>>> I am planning to use only a VNC console.
>>>>>>>> Can I disable the VGA settings (-vga none) and only use the BBC server?
>>>>>>>> If not, what's the minimal (as far as the host resources are concerned)
>>>>>>>> configuration for the local text-only console via VNC?
>>>>>>>>
>>>>>>>> TIA.
>>>>>>>>
>>>>>>>
>>>>>>> I don't think it is possible to VNC to text mode console.  Is there a 
>>>>>>> reason
>>>>>>> why you don't want to telnet/ssh to a guest and then run screen?
>>>>>>>
>>>>>>> Alex
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>