[Qemu-devel] [Bug 1377095] [NEW] KVM guest VM does not reattach a throughpassed USB printer from Host after switching printer off and on

[Qemu-devel] [Bug 1377095] [NEW] KVM guest VM does not reattach a throughpassed USB printer from Host after switching printer off and on

[123p]

Public bug reported:


Host OS: Gentoo, all packages built 2014-10-01

qemu version 2.1.0-r1

Linux kernel 3.14.14   x86_64 Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz
GenuineIntel GNU/Linux


Guest VM: Debian 7 (Wheezy) Linux 3.2.0 686


Start command:
/usr/bin/qemu-system-i386 -enable-kvm -name wheezy -k de -serial null -parallel null -hda /var/kvm/wheezy.kvm-img -daemonize -net nic,macaddr=02:00:00:00:01:31 -net tap,ifname=tap3,script=no,downscript=no -m 512 -pidfile /var/run/kvm/wheezy.pid -usb -usbdevice tablet -runas myuser -vnc 127.0.0.1:3 -usbdevice host:04e8:3242

Problem:
USB printer pass-through from KVM host to guest vm only works if I start the qemu kvm when the USB printer (vendor/product ID 04e8:3242) is switched on and therefore shown in lsusb on the host. Then it is available in the started VM.

But when I switch the usb printer attached to the host off, it
disappears in lsusb both on the host and the VM (as expected) but when I
switch the USB printer on again, it is shown on the host and also on the
QEMU Monitor (Crtl Alt Shift 2 -> info usbhost), but in the VM lsusb
does not show it again- so USB pass-through / hot plugging does not
work. It worked with a previous Version of qemu (1.0 or something).

That is very annoying, because every time I want to print something, I need to shutdown the VM, start the printer, and then start the VM (which runs cups as printer server).
But after printing, I do not want the printer to keep running, so I switch it off.

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: hotplug pass-through printer usb

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Title:
  KVM guest VM does not reattach a throughpassed USB printer from Host
  after switching printer off and on

Status in QEMU:
  New

Bug description:
  
  Host OS: Gentoo, all packages built 2014-10-01

  qemu version 2.1.0-r1

  Linux kernel 3.14.14   x86_64 Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz
  GenuineIntel GNU/Linux

  
  Guest VM: Debian 7 (Wheezy) Linux 3.2.0 686

  
  Start command:
  /usr/bin/qemu-system-i386 -enable-kvm -name wheezy -k de -serial null -parallel null -hda /var/kvm/wheezy.kvm-img -daemonize -net nic,macaddr=02:00:00:00:01:31 -net tap,ifname=tap3,script=no,downscript=no -m 512 -pidfile /var/run/kvm/wheezy.pid -usb -usbdevice tablet -runas myuser -vnc 127.0.0.1:3 -usbdevice host:04e8:3242

  Problem:
  USB printer pass-through from KVM host to guest vm only works if I start the qemu kvm when the USB printer (vendor/product ID 04e8:3242) is switched on and therefore shown in lsusb on the host. Then it is available in the started VM.

  But when I switch the usb printer attached to the host off, it
  disappears in lsusb both on the host and the VM (as expected) but when
  I switch the USB printer on again, it is shown on the host and also on
  the QEMU Monitor (Crtl Alt Shift 2 -> info usbhost), but in the VM
  lsusb does not show it again- so USB pass-through / hot plugging does
  not work. It worked with a previous Version of qemu (1.0 or
  something).

  That is very annoying, because every time I want to print something, I need to shutdown the VM, start the printer, and then start the VM (which runs cups as printer server).
  But after printing, I do not want the printer to keep running, so I switch it off.

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[Qemu-devel] [Bug 1377095] Re: KVM guest VM does not reattach a throughpassed USB printer from Host after switching printer off and on

[123p]

This is a very annoying bug, and it is still not solved after six
months, last versions tested with the bug:

KVM host qemu version 2.2.1

KVM host Linux version 3.14.37

Please fix this.

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https://bugs.launchpad.net/bugs/1377095

Title:
  KVM guest VM does not reattach a throughpassed USB printer from Host
  after switching printer off and on

Status in QEMU:
  New

Bug description:
  
  Host OS: Gentoo, all packages built 2014-10-01

  qemu version 2.1.0-r1

  Linux kernel 3.14.14   x86_64 Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz
  GenuineIntel GNU/Linux

  
  Guest VM: Debian 7 (Wheezy) Linux 3.2.0 686

  
  Start command:
  /usr/bin/qemu-system-i386 -enable-kvm -name wheezy -k de -serial null -parallel null -hda /var/kvm/wheezy.kvm-img -daemonize -net nic,macaddr=02:00:00:00:01:31 -net tap,ifname=tap3,script=no,downscript=no -m 512 -pidfile /var/run/kvm/wheezy.pid -usb -usbdevice tablet -runas myuser -vnc 127.0.0.1:3 -usbdevice host:04e8:3242

  Problem:
  USB printer pass-through from KVM host to guest vm only works if I start the qemu kvm when the USB printer (vendor/product ID 04e8:3242) is switched on and therefore shown in lsusb on the host. Then it is available in the started VM.

  But when I switch the usb printer attached to the host off, it
  disappears in lsusb both on the host and the VM (as expected) but when
  I switch the USB printer on again, it is shown on the host and also on
  the QEMU Monitor (Crtl Alt Shift 2 -> info usbhost), but in the VM
  lsusb does not show it again- so USB pass-through / hot plugging does
  not work. It worked with a previous Version of qemu (1.0 or
  something).

  That is very annoying, because every time I want to print something, I need to shutdown the VM, start the printer, and then start the VM (which runs cups as printer server).
  But after printing, I do not want the printer to keep running, so I switch it off.

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[Qemu-devel] [Bug 1377095] Re: KVM guest VM does not reattach a throughpassed USB printer from Host after switching printer off and on

[123p]

This is a very annoying bug, and it is still not solved after 2.7 years.
Last versions tested and affected by this bug:

KVM host qemu version 2.9.0

KVM host Linux version 4.9.6 x86_64

Please fix this.

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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1377095

Title:
  KVM guest VM does not reattach a throughpassed USB printer from Host
  after switching printer off and on

Status in QEMU:
  New

Bug description:
  
  Host OS: Gentoo, all packages built 2014-10-01

  qemu version 2.1.0-r1

  Linux kernel 3.14.14   x86_64 Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz
  GenuineIntel GNU/Linux

  
  Guest VM: Debian 7 (Wheezy) Linux 3.2.0 686

  
  Start command:
  /usr/bin/qemu-system-i386 -enable-kvm -name wheezy -k de -serial null -parallel null -hda /var/kvm/wheezy.kvm-img -daemonize -net nic,macaddr=02:00:00:00:01:31 -net tap,ifname=tap3,script=no,downscript=no -m 512 -pidfile /var/run/kvm/wheezy.pid -usb -usbdevice tablet -runas myuser -vnc 127.0.0.1:3 -usbdevice host:04e8:3242

  Problem:
  USB printer pass-through from KVM host to guest vm only works if I start the qemu kvm when the USB printer (vendor/product ID 04e8:3242) is switched on and therefore shown in lsusb on the host. Then it is available in the started VM.

  But when I switch the usb printer attached to the host off, it
  disappears in lsusb both on the host and the VM (as expected) but when
  I switch the USB printer on again, it is shown on the host and also on
  the QEMU Monitor (Crtl Alt Shift 2 -> info usbhost), but in the VM
  lsusb does not show it again- so USB pass-through / hot plugging does
  not work. It worked with a previous Version of qemu (1.0 or
  something).

  That is very annoying, because every time I want to print something, I need to shutdown the VM, start the printer, and then start the VM (which runs cups as printer server).
  But after printing, I do not want the printer to keep running, so I switch it off.

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[Qemu-devel] [Bug 1377095] Re: KVM guest VM does not reattach a throughpassed USB printer from Host after switching printer off and on

[Thomas Huth]

I guess switching the printer off and on again is like attaching a new
USB device to your host (so it only shows up in the host, of course, and
not in the guest). Have you already tried to do a new "device_add usb-
host,..." in the QEMU monitor to attach it to the guest again while the
VM is running?

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1377095

Title:
  KVM guest VM does not reattach a throughpassed USB printer from Host
  after switching printer off and on

Status in QEMU:
  New

Bug description:
  
  Host OS: Gentoo, all packages built 2014-10-01

  qemu version 2.1.0-r1

  Linux kernel 3.14.14   x86_64 Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz
  GenuineIntel GNU/Linux

  
  Guest VM: Debian 7 (Wheezy) Linux 3.2.0 686

  
  Start command:
  /usr/bin/qemu-system-i386 -enable-kvm -name wheezy -k de -serial null -parallel null -hda /var/kvm/wheezy.kvm-img -daemonize -net nic,macaddr=02:00:00:00:01:31 -net tap,ifname=tap3,script=no,downscript=no -m 512 -pidfile /var/run/kvm/wheezy.pid -usb -usbdevice tablet -runas myuser -vnc 127.0.0.1:3 -usbdevice host:04e8:3242

  Problem:
  USB printer pass-through from KVM host to guest vm only works if I start the qemu kvm when the USB printer (vendor/product ID 04e8:3242) is switched on and therefore shown in lsusb on the host. Then it is available in the started VM.

  But when I switch the usb printer attached to the host off, it
  disappears in lsusb both on the host and the VM (as expected) but when
  I switch the USB printer on again, it is shown on the host and also on
  the QEMU Monitor (Crtl Alt Shift 2 -> info usbhost), but in the VM
  lsusb does not show it again- so USB pass-through / hot plugging does
  not work. It worked with a previous Version of qemu (1.0 or
  something).

  That is very annoying, because every time I want to print something, I need to shutdown the VM, start the printer, and then start the VM (which runs cups as printer server).
  But after printing, I do not want the printer to keep running, so I switch it off.

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[Bug 1377095] Re: KVM guest VM does not reattach a throughpassed USB printer from Host after switching printer off and on

[123p]

Thanks Thomas for Your suggestion. Unfortunately I cannot achieve the
reconnection:

KVM runs with following parameters:

-usb -device usb-host,vendorid=0x04e8,productid=0x3242,id=drucker
-monitor unix:qemu-monitor-socket,server,nowait

With the Unix socket, I can now pipe commands to the qemu monitor. This
info command works:

echo 'info status' | socat - unix-connect:/qemu-monitor-socket
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) info status
VM status: running

What I have is this:
- disconnect USB printer (Product Samsung ML-1510_700)
- stop KVM
- connect USB printer
- start KVM

echo 'info usb' | socat - unix-connect:/qemu-monitor-socket
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) info usb
  Device 0.1, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.2, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.3, Port 2.1, Speed 12 Mb/s, Product Samsung ML-1510_700, ID: drucker

Printer works.
- disconnect printer

echo 'info usb' | socat - unix-connect:/qemu-monitor-socket
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) info usb
  Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.4, Port 2.1, Speed 12 Mb/s, Product Samsung ML-1510_700, ID: drucker

USB Info still shows the printer, allthough it is disconnected.

Remove device from KVM:

echo 'device_del drucker' | socat - unix-connect:/qemu-monitor-socket

Printer is removed from the device list:

info usbdrucker' | socat - unix-connect:/qemu-monitor-socket
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) info usb
  Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub

-connect printer

printer is not shown:

echo 'info usb' | socat - unix-connect:/qemu-monitor-socket
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) info usb
  Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub

Add printer device:

echo 'device_add usb-host,vendorid=0x04e8,productid=0x3242,id=drucker ' | socat - unix-connect:/qemu-monitor-socket
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) device_add usb-host,vendorid=0x04e8,productid=0x3242,id=drucker

echo 'info usb' | socat - unix-connect:/qemu-monitor-socket
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) info usb
  Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.0, Port 2.2, Speed 1.5 Mb/s, Product USB Host Device, ID: drucker

Device is shown, but not like when KVM is started with connected
printer: Speed only 1.5 Mb/s, no vendor and product info.

Printer does _not_ work.

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https://bugs.launchpad.net/bugs/1377095

Title:
  KVM guest VM does not reattach a throughpassed USB printer from Host
  after switching printer off and on

Status in QEMU:
  New

Bug description:
  
  Host OS: Gentoo, all packages built 2014-10-01

  qemu version 2.1.0-r1

  Linux kernel 3.14.14   x86_64 Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz
  GenuineIntel GNU/Linux

  
  Guest VM: Debian 7 (Wheezy) Linux 3.2.0 686

  
  Start command:
  /usr/bin/qemu-system-i386 -enable-kvm -name wheezy -k de -serial null -parallel null -hda /var/kvm/wheezy.kvm-img -daemonize -net nic,macaddr=02:00:00:00:01:31 -net tap,ifname=tap3,script=no,downscript=no -m 512 -pidfile /var/run/kvm/wheezy.pid -usb -usbdevice tablet -runas myuser -vnc 127.0.0.1:3 -usbdevice host:04e8:3242

  Problem:
  USB printer pass-through from KVM host to guest vm only works if I start the qemu kvm when the USB printer (vendor/product ID 04e8:3242) is switched on and therefore shown in lsusb on the host. Then it is available in the started VM.

  But when I switch the usb printer attached to the host off, it
  disappears in lsusb both on the host and the VM (as expected) but when
  I switch the USB printer on again, it is shown on the host and also on
  the QEMU Monitor (Crtl Alt Shift 2 -> info usbhost), but in the VM
  lsusb does not show it again- so USB pass-through / hot plugging does
  not work. It worked with a previous Version of qemu (1.0 or
  something).

  That is very annoying, because every time I want to print something, I need to shutdown the VM, start the printer, and then start the VM (which runs cups as printer server).
  But after printing, I do not want the printer to keep running, so I switch it off.

To manage notifications about this bug go to:
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[Bug 1377095] Re: KVM guest VM does not reattach a throughpassed USB printer from Host after switching printer off and on

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/110


** Changed in: qemu
       Status: New => Expired

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #110
   https://gitlab.com/qemu-project/qemu/-/issues/110

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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1377095

Title:
  KVM guest VM does not reattach a throughpassed USB printer from Host
  after switching printer off and on

Status in QEMU:
  Expired

Bug description:
  
  Host OS: Gentoo, all packages built 2014-10-01

  qemu version 2.1.0-r1

  Linux kernel 3.14.14   x86_64 Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz
  GenuineIntel GNU/Linux

  
  Guest VM: Debian 7 (Wheezy) Linux 3.2.0 686

  
  Start command:
  /usr/bin/qemu-system-i386 -enable-kvm -name wheezy -k de -serial null -parallel null -hda /var/kvm/wheezy.kvm-img -daemonize -net nic,macaddr=02:00:00:00:01:31 -net tap,ifname=tap3,script=no,downscript=no -m 512 -pidfile /var/run/kvm/wheezy.pid -usb -usbdevice tablet -runas myuser -vnc 127.0.0.1:3 -usbdevice host:04e8:3242

  Problem:
  USB printer pass-through from KVM host to guest vm only works if I start the qemu kvm when the USB printer (vendor/product ID 04e8:3242) is switched on and therefore shown in lsusb on the host. Then it is available in the started VM.

  But when I switch the usb printer attached to the host off, it
  disappears in lsusb both on the host and the VM (as expected) but when
  I switch the USB printer on again, it is shown on the host and also on
  the QEMU Monitor (Crtl Alt Shift 2 -> info usbhost), but in the VM
  lsusb does not show it again- so USB pass-through / hot plugging does
  not work. It worked with a previous Version of qemu (1.0 or
  something).

  That is very annoying, because every time I want to print something, I need to shutdown the VM, start the printer, and then start the VM (which runs cups as printer server).
  But after printing, I do not want the printer to keep running, so I switch it off.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1377095/+subscriptions