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

[Narcis Garcia]

Thanks to Shiyao Ma for sharing the procedure.


El 16/12/16 a les 01:07, Shiyao Ma ha escrit:
> 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
> <http://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
> <mailto: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
>     <mailto: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
>     <mailto: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
>     <https://introo.me>。
> 
> 
> 
> 
> -- 
> 
> 吾輩は猫である。ホームーページはhttps://introo.me <http://introo.me>。