[vfio-users] VM loses mouse

[Patrick O'Callaghan]

On Thu, 2017-04-20 at 04:13 +0200, Manuel Ullmann wrote:
> > > 2017-04-18T16:14:08.649575Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
> > > 
> > > Only the last line looks relevant.
> > 
> > Actually looking again I doubt it's relevant. The datestamp is
> > yesterday but the problem happened only minutes ago.
> 
> I get this one also randomly with both mouse and keyboard lately. Could
> be related to the USB2 hub though. I’ll have to do some tests in the VM
> soon, so I could test without hub. Would a USB3 front panel interfere or
> is that okay? Otherwise I would have to reduce working distance to the
> monitor and Windows is so goddamn bright.
> 
> Virtual USB controller type is USB2. USB3 crashed the VM instantly since
> 2.8.0 (before I used the hub). Maybe it was fixed in the meantime, but
> I’m not so happy with this release.
> 
> Best regards,
> Manuel
> 
> That was in one session. Had to destroy it. The ports powered off and
> thus were not available for the host anymore.
> error message from keyboard assigning:
> 2017-04-17T05:34:51.739873Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
> 2017-04-17T05:34:51.739947Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
> 2017-04-17T05:34:51.739952Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
> 2017-04-17T05:34:51.739954Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
> libusb: error [_open_sysfs_attr] open /sys/bus/usb/devices/3-6.1.3/bConfigurationValue failed ret=-1 errno=2
> 
> error message from mouse assigning:
> 2017-04-17T05:34:53.755392Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
> 2017-04-17T05:34:53.755408Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
> libusb: error [_open_sysfs_attr] open /sys/bus/usb/devices/3-6.2/bConfigurationValue failed ret=-1 errno=2

I also had problems when switching the mouse around on a live system
between a USB2 and USB3 port, both physical and virtual. Windows
crashed so severely it couldn't recover on reboot and I had to
reinstall it after saving my data with guestfs.

poc