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Groups > linux.debian.user > #240199 > unrolled thread

qemu-system-x86: qemu doesn't show window with VM

Started byStefan Krusche <linux@stefan-krusche.de>
First post2021-09-20 15:20 +0200
Last post2021-09-20 20:20 +0200
Articles 6 — 3 participants

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  qemu-system-x86: qemu doesn't show window with VM Stefan Krusche <linux@stefan-krusche.de> - 2021-09-20 15:20 +0200
    Re: qemu-system-x86: qemu doesn't show window with VM Dan Ritter <dsr@randomstring.org> - 2021-09-20 15:30 +0200
      Re: qemu-system-x86: qemu doesn't show window with VM Stefan Krusche <linux@stefan-krusche.de> - 2021-09-20 17:40 +0200
        Re: qemu-system-x86: qemu doesn't show window with VM Dan Ritter <dsr@randomstring.org> - 2021-09-20 18:00 +0200
    Re: qemu-system-x86: qemu doesn't show window with VM "Thomas Schmitt" <scdbackup@gmx.net> - 2021-09-20 18:00 +0200
      Re: qemu-system-x86: qemu doesn't show window with VM Stefan Krusche <linux@stefan-krusche.de> - 2021-09-20 20:20 +0200

#240199 — qemu-system-x86: qemu doesn't show window with VM

FromStefan Krusche <linux@stefan-krusche.de>
Date2021-09-20 15:20 +0200
Subjectqemu-system-x86: qemu doesn't show window with VM
Message-ID<CZrnc-4Ik-5@gated-at.bofh.it>
Good Day All,

Problem description:

When I start qemu with the following command the VM seemingly gets
started but no window whatsoever shows up. AFAIR it always has worked
like that before.

$ qemu-system-x86_64 -m 1024M -name "Devuan GNU/Linux
Beowulf" -enable-kvm \
-vga cirrus -net nic -net user,hostfwd=tcp::1926-:22 -cdrom \
/mnt/somedir/devuan_beowulf_3.0.0_amd64_desktop-live.iso \
-boot menu=on &
$ qemu64 -m 1024M -name "eXe GNU/Linux" -enable-kvm -vga cirrus -net nic
\
-net
user,hostfwd=tcp::1921-:22 -cdrom /mnt/isodir/exegnu64_beowulf-20200707.iso
&

$ jobs
[1]-  Running                 qemu-system-x86_64 -m 1024M -name "Devuan
GNU/Linux Beowulf" -enable-kvm -vga cirrus -net nic -net
user,hostfwd=tcp::1926-:22 -cdrom /mnt/somedir/devuan_beowulf_3.0.0_amd64_desktop-live.iso -boot
menu=on &  (wd: /mnt/somedir)
[2]+  Running                 qemu-system-x86_64 -m 1024M -name "eXe
GNU/Linux" -enable-kvm -vga cirrus -net nic -net
user,hostfwd=tcp::1921-:22 -cdrom /mnt/isodir/exegnu64_beowulf-20200707.iso
&  (wd: /mnt/isodir)

There is nothing in dmesg/syslog/messages/kern.log that indicates
something went wrong. There is only one message (per VM I think) which
says:

# kern.log
kernel: kvm [1608]: vcpu0, guest rIP: 0xffffffffbe25eb48 disabled
perfctr wrmsr: 0xc2 data 0xffff

After two hours of digging I neither can find a reason nor a report for
this behaviour on the net. Does anybody know what I might have missed
or how I can further troubleshoot?

Thanks for any hint.

Kind regards,
Stefan

Package: qemu-system-x86
Version: 1:5.2+dfsg-9~bpo10+1

The following sys info was gathered by reportbug. The misbehaviour also
happens with standard debian kernel: Linux 4.19.0-17-amd64 #1 SMP
Debian 4.19.194-3 (2021-07-18) x86_64 GNU/Linux.

# created by reportbug:
System information:
Distributor ID: Devuan
Description:    Devuan GNU/Linux 3 (beowulf)
Release:        3
Codename:       beowulf
Architecture: x86_64

Kernel: Linux 5.12.0-19.3-liquorix-amd64 (SMP w/8 CPU cores; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages qemu-system-x86 depends on:
ii  ipxe-qemu             1.0.0+git-20190125.36a4c85-1
ii  libaio1               0.3.112-3
ii  libasound2            1.1.8-1
ii  libbrlapi0.6          5.6-10+deb10u1
ii  libc6                 2.28-10
ii  libcacard0            1:2.6.1-1
ii  libcapstone4          4.0.2-3~bpo10+1
ii  libepoxy0             1.5.3-0.1
ii  libeudev1 [libudev1]  3.2.9-10~beowulf1
ii  libfdt1               1.6.0-1~bpo10+1
ii  libgbm1               18.3.6-2+deb10u1
ii  libgcc1               1:8.3.0-6
ii  libglib2.0-0          2.58.3-2+deb10u3
ii  libgnutls30           3.6.7-4+deb10u7
ii  libibverbs1           22.1-1
ii  libjpeg62-turbo       1:1.5.2-2+deb10u1
ii  libncursesw6          6.1+20181013-2+deb10u2
ii  libnettle6            3.4.1-1+deb10u1
ii  libnuma1              2.0.12-1
ii  libpixman-1-0         0.36.0-1
ii  libpmem1              1.5.1-1
ii  libpng16-16           1.6.36-6
ii  librdmacm1            22.1-1
ii  libsasl2-2            2.1.27+dfsg-1+deb10u1
ii  libseccomp2           2.3.3-4
ii  libslirp0             4.3.1-1~bpo10+1
ii  libspice-server1      0.14.0-1.3+deb10u1
ii  libtinfo6             6.1+20181013-2+deb10u2
ii  libudev1              1:3.2.9+devuan4
ii  liburing1             0.7-3~bpo10+1
ii  libusb-1.0-0          2:1.0.22-2
ii  libusbredirparser1    0.8.0-1
ii  libvdeplug2           2.3.2+r586-2.2
ii  libvirglrenderer0     0.7.0-2
ii  libxendevicemodel1    4.11.4+107-gef32c7afa2-1
ii  libxenevtchn1         4.11.4+107-gef32c7afa2-1
ii  libxenforeignmemory1  4.11.4+107-gef32c7afa2-1
ii  libxengnttab1         4.11.4+107-gef32c7afa2-1
ii  libxenmisc4.11        4.11.4+107-gef32c7afa2-1
ii  libxenstore3.0        4.11.4+107-gef32c7afa2-1
ii  libxentoolcore1       4.11.4+107-gef32c7afa2-1
ii  qemu-system-common    1:5.2+dfsg-9~bpo10+1
ii  qemu-system-data      1:5.2+dfsg-9~bpo10+1
ii  seabios               1.12.0-1
ii  zlib1g                1:1.2.11.dfsg-1

Versions of packages qemu-system-x86 recommends:
pn  ovmf             <none>
pn  qemu-system-gui  <none>
ii  qemu-utils       1:5.2+dfsg-9~bpo10+1

Versions of packages qemu-system-x86 suggests:
pn  qemu-block-extra            <none>
ii  qemu-system-data [sgabios]  1:5.2+dfsg-9~bpo10+1
pn  samba                       <none>
pn  vde2                        <none>

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#240200

FromDan Ritter <dsr@randomstring.org>
Date2021-09-20 15:30 +0200
Message-ID<CZrwR-4LE-3@gated-at.bofh.it>
In reply to#240199
Stefan Krusche wrote: 
> Good Day All,
> 
> Problem description:
> 
> When I start qemu with the following command the VM seemingly gets
> started but no window whatsoever shows up. AFAIR it always has worked
> like that before.
> 
> $ qemu-system-x86_64 -m 1024M -name "Devuan GNU/Linux
> Beowulf" -enable-kvm \
> -vga cirrus -net nic -net user,hostfwd=tcp::1926-:22 -cdrom \
> /mnt/somedir/devuan_beowulf_3.0.0_amd64_desktop-live.iso \
> -boot menu=on &
> $ qemu64 -m 1024M -name "eXe GNU/Linux" -enable-kvm -vga cirrus -net nic
> \
> -net
> user,hostfwd=tcp::1921-:22 -cdrom /mnt/isodir/exegnu64_beowulf-20200707.iso
> &

I don't expect an invocation of qemu to open a window, I expect
it to run the VM. 

If you want to see the console of the VM, use virtviewer or
spiceclient or vncviewer as appropriate.

if you want an all-in-one management system, run this via
virtmanager.

-dsr-

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#240202

FromStefan Krusche <linux@stefan-krusche.de>
Date2021-09-20 17:40 +0200
Message-ID<CZtyF-5Ze-3@gated-at.bofh.it>
In reply to#240200
Am Montag, 20. September 2021 schrieb Dan Ritter:
> Stefan Krusche wrote:
> > Good Day All,
> >
> > Problem description:
> >
> > When I start qemu with the following command the VM seemingly gets
> > started but no window whatsoever shows up. AFAIR it always has
> > worked like that before.
> >
> > $ qemu-system-x86_64 -m 1024M -name "Devuan GNU/Linux
> > Beowulf" -enable-kvm \
> > -vga cirrus -net nic -net user,hostfwd=tcp::1926-:22 -cdrom \
> > /mnt/somedir/devuan_beowulf_3.0.0_amd64_desktop-live.iso \
> > -boot menu=on &
> > $ qemu64 -m 1024M -name "eXe GNU/Linux" -enable-kvm -vga cirrus
> > -net nic \
> > -net
> > user,hostfwd=tcp::1921-:22 -cdrom
> > /mnt/isodir/exegnu64_beowulf-20200707.iso &
>
> I don't expect an invocation of qemu to open a window, I expect
> it to run the VM.

Well, not sure what you mean. Does the VM not run in a window?!

I'm pretty sure that in the past like until 1-2 years ago always a 
window opened up in which the VM (actually the OS I wanted to run in a 
VM) was running (for example with the boot menu from an install.iso). 

In this window I could with 'Ctrl+1' or 'Ctrl+2' switch between the 
running VM and the qemu console (there was also 'Ctrl+3' but I don't 
remember whatfor). I can't remember to have used any virtmanager 
software. I only used the command above and a window would open with 
the running VM.

> If you want to see the console of the VM, use virtviewer or
> spiceclient or vncviewer as appropriate.
> 
> if you want an all-in-one management system, run this via 
> virtmanager.

I'm a bit puzzled because I never had to use any of these…

> -dsr-

Thank you.

Kind regards,
Stefan

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#240204

FromDan Ritter <dsr@randomstring.org>
Date2021-09-20 18:00 +0200
Message-ID<CZtS2-65J-3@gated-at.bofh.it>
In reply to#240202
Stefan Krusche wrote: 
> Am Montag, 20. September 2021 schrieb Dan Ritter:
> > Stefan Krusche wrote:
> >
> > I don't expect an invocation of qemu to open a window, I expect
> > it to run the VM.
> 
> Well, not sure what you mean. Does the VM not run in a window?!

No. The VM is a process. The VM may have a graphical interface,
in which case, something has to invoke it. Your command starts
the VM, but it doesn't start a graphical client.

> I'm a bit puzzled because I never had to use any of these…

Well, why don't you try them and find out if it solves your
problem?

-dsr-

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#240203

From"Thomas Schmitt" <scdbackup@gmx.net>
Date2021-09-20 18:00 +0200
Message-ID<CZtS1-65J-1@gated-at.bofh.it>
In reply to#240199
Hi,

Stefan Krusche wrote:
> When I start qemu with the following command the VM seemingly gets
> started but no window whatsoever shows up. AFAIR it always has worked
> like that before.

That's my memory too. The script for my Sid VM has option -nographic
to prevent such a qemu window from showing up.

  https://manpages.debian.org/bullseye/qemu-system-x86/qemu-system-x86_64.1.en.html

  -nographic
    Normally, if QEMU is compiled with graphical window support, it
    displays output such as guest graphics, guest console, and the QEMU
    monitor in a window. With this option, you can totally disable
    graphical output so that QEMU is a simple command line application.
    ...


> $ qemu-system-x86_64 [...] -vga cirrus [...]

Did you try whether you get a window without option -vga cirrus ?


Have a nice day :)

Thomas

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#240207

FromStefan Krusche <linux@stefan-krusche.de>
Date2021-09-20 20:20 +0200
Message-ID<CZw3x-7yt-13@gated-at.bofh.it>
In reply to#240203
Am Montag, 20. September 2021 schrieb Thomas Schmitt:
> Hi,
>
> Stefan Krusche wrote:
> > When I start qemu with the following command the VM seemingly gets
> > started but no window whatsoever shows up. AFAIR it always has
> > worked like that before.
>
> That's my memory too. The script for my Sid VM has option -nographic
> to prevent such a qemu window from showing up.
>
>
> https://manpages.debian.org/bullseye/qemu-system-x86/qemu-system-x86_
>64.1.en.html
>
>   -nographic
>     Normally, if QEMU is compiled with graphical window support, it
>     displays output such as guest graphics, guest console, and the
> QEMU monitor in a window. With this option, you can totally disable
> graphical output so that QEMU is a simple command line application.
> ...
>
> > $ qemu-system-x86_64 [...] -vga cirrus [...]
>
> Did you try whether you get a window without option -vga cirrus ?

I have got it. The hint to the graphics brought me on the right track. I
needed to install package qemu-system-gui to get the wanted behaviour
that qemu starts in a window.

Thanks everybody!

Cheers,
Stefan

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