Re: [Qemu-discuss] qemu-system-x86_64 hangs in 1024 x 768 Graphic mode when using -curses

[Kevin Wilson]

Hi,
Sorry, this did not worked for me; when using -curses, it shows the
640x480 screen. It *does not * respond to pressing "Esc". (or to any
other key).

I disabled the frame buffer by adding  "fbcon=map:99 text" to the
command line (and made sure, after reboot,  that cat /proc/cmdline
does show it).

Also I added:
blacklist vga16fb
in  /etc/modprobe.d/blacklist-framebuffer.conf

and made sure that:
lsmod | grep vga16fb
returns noting,

My setup is Ubuntu 14.04.1 server, and the command sequence I ran is:

qemu-img create -f qcow2 vdisk.img 10G
qemu-system-x86_64 -curses -hda vdisk.img -cdrom
ubuntu-14.04.1-server-amd64.iso -boot d  -m 384

Any ideas why the "Esc" does not work ?
Did anyone tried something similar ?

Regards,
Kevin

On Fri, Dec 16, 2016 at 2:07 AM, Shiyao Ma <address@hidden> wrote:
> Hi, Kevin
>
> The key part is, when you run the system image without X, the framebuffer
> stuff should already be disabled in that image. Or at least you can a chance
> to modify it, like what I did by SSH.
>
> Here's what I was doing when installing the debian netiso image.  Note, for
> all the procedure below, there is no X running.  I am doing it on the server
> (via ssh without X forwarding).
>
>
> 1. First, download the netiso image.
> 2. create the image.
>      qemu-img create -f qcow2 eva.qcow 4G
>
> 3.  then run with the cd image.
>      sudo kvm -cdrom debian-8.6.0-amd64-netinst.iso -hda eva.qcow -boot d
> -curses
>
>      note here, you must disable the framebuffer.
>      refer to this s.o, http://stackoverflow.com/a/36666901/855160
>      basically, you should type this:
>      <esc>
>      install vga=normal fb=false
>
>      BTW, choose debian expert mode to not install the Desktop Envrionment.
> Surely, you don't want X.
>
>      BTW, don' t forget to install the OPENSSH SERVER!  see 4.) for the
> reason.
>
> 4. after installation, you will boot the machine.
>      You must change the grub and the runlevel.
>      You should first run qemu with the user network, for example,
>      sudo kvm -m 256 eva.qcow2 -net nic,model=virtio -net
> user,net=192.168.101.0/24,hostfwd=tcp::8022-:22 -curses
>      so now you can ssh into the server.
>
>        # refer to this: http://tinyurl.com/ogpo7be
>    1. update grub to be in text mode.
>       GRUB_CMDLINE_LINUX="nomodeset text"
>       GRUB_TERMINAL="console"
>
>      don't forget to run the update-grub command
>
>    2. update debian to be in text mode.
>       sudo systemctl set-default multi-user.target
>
> 5. shutdown that guest and run qemu with the
>     "-curses -vga virtio" option.
>
>    (the  "-vga virtio" is what takes me the most time to figure out. ;).
>
>
> That's the whole process I took.
>
>
>
>
>
> On Fri, Dec 16, 2016 at 2:51 AM, Kevin Wilson <address@hidden> wrote:
>>
>> Hi, Shiyao Ma,
>>
>> Thanks for the advise. I will sure try it!
>>
>> I thought about the following in order to simplify it. Before giving
>> it a try, I want to ask your opinion if I may - do you think it will
>> work ?
>>
>> Suppose I will download the latest qemu tar ball and compile it with
>> the same flags on two machines. One will be Ubuntu desktop which runs
>> XWindows and the second will be Ubuntu server, which does not run
>> XWindows.
>>
>> Now, I will start the XWindows machine with the graphical mode, and I
>> will run from there:
>> qemu-img create -f qcow2 vdisk.img 10G
>> And then:
>> qemu-system-x86_64 -curses   -hda vdisk.img -cdrom
>> ubuntu-14.04.1-server-amd64.iso -boot d  -m 384
>>
>> Now this should work I believe (maybe even without the curses).
>>
>> Note that the iso is Ubuntu server image - this means that the OS that
>> will be installed will be in text mode, as it is a server.
>>
>> Now, let's say it will complete OK and I will take vdisk.img and copy
>> it to the second machine, which does not run XWindows, and than try to
>> boot it from the terminal with something like:
>>
>> qemu-system-x86_64 vdisk.img -m 384
>>
>> Are there chances that this will work ?
>>
>> Regards,
>> Kevin
>>
>>
>>
>> On Thu, Dec 15, 2016 at 1:48 PM, Shiyao Ma <address@hidden> wrote:
>> > Hi Kevin,
>> >
>> > I met the same problem and posted in the mailing list like 10 days ago.
>> >
>> > You can check the mailing list archive.
>> >
>> > Briefly, two points should be kept in mind.
>> >
>> > 1. the grub should be boot in text mode, disable the framebuffer.
>> >
>> > 2. the qemu command should be with, -curses -vga virtio
>> >     the -vga virtio is important.  of course, YMMV.
>> >
>> >
>> > Good luck!
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Tue, Dec 13, 2016 at 11:42 PM, Kevin Wilson <address@hidden>
>> > wrote:
>> >>
>> >> Hi,
>> >>
>> >> I have this setup:
>> >> - Ubuntu Server 14.04.1:
>> >> - QEMU version 2.2.0:
>> >>
>> >> qemu-system-x86_64 --version
>> >> QEMU emulator version 2.2.0 (Debian 2:2.2+dfsg-5expubuntu8+contrail3),
>> >> Copyright (c) 2003-2008 Fabrice Bellard
>> >>
>> >> I had downloaded fedora 21 installation iso:
>> >> Fedora-Live-Workstation-x86_64-21-5.iso
>> >>
>> >> I am trying the following sequence:
>> >>
>> >> qemu-img create -f qcow2 vdisk.img 10G
>> >> I use "-curses", as this machine is a server, and X windows is not
>> >> installed there:
>> >>
>> >> qemu-system-x86_64 -curses   -hda vdisk.img -cdrom
>> >> Fedora-Live-Workstation-x86_64-21-5.iso -boot d  -m 384
>> >>
>> >>  and I am stuck with a black screen with one line on it, in blue: 1024
>> >> x 768 Graphic mode.
>> >> This screen does not respond to any keystrokes. except for that
>> >>   I can toggle to monitor mode with ALT/2, but this does not help at
>> >> all.
>> >>
>> >> when I tried with "-nographic" instead of "-curses", the installation
>> >> hangs.
>> >>
>> >> What should I do in able to boot successfully?
>> >>
>> >>
>> >>  Regards,
>> >>  Kevin
>> >>
>> >
>> >
>> >
>> > --
>> >
>> > 吾輩は猫である。ホームーページはhttps://introo.me。
>
>
>
>
> --
>
> 吾輩は猫である。ホームーページはhttps://introo.me。