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PROTechThor 2020-10-26 04:22:27 +01:00
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introduction/faq.md
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@ -487,7 +487,26 @@ Enable "debug mode" in the qube's settings, either by checking the box labeled "
### I created a usbVM and assigned usb controllers to it. Now the usbVM wont boot. ### I created a usbVM and assigned usb controllers to it. Now the usbVM wont boot.
This is probably because one of the controllers does not support reset. This is probably because one of the controllers does not support reset.
See the [USB Troubleshooting guide](/doc/usb-troubleshooting/#usbVM-does-not-boot-after-creating-and-assigning-USB-controllers-to-it). See the [USB Troubleshooting guide](/doc/usb-troubleshooting/#usbvm-does-not-boot-after-creating-and-assigning-usb-controllers-to-it).
### I assigned a PCI device to a qube, then unassigned it/shut down the qube. Why isn't the device available in dom0?
This is an intended feature.
A device which was previously assigned to a less trusted qube could attack dom0 if it were automatically reassigned there.
In order to re-enable the device in dom0, either:
* Reboot the physical machine.
or
* Go to the sysfs (`/sys/bus/pci`), find the right device, detach it from the pciback driver and attach back to the original driver. Replace `<BDF>` with your device, for example `00:1c.2`:
echo 0000:<BDF> > /sys/bus/pci/drivers/pciback/unbind
MODALIAS=`cat /sys/bus/pci/devices/0000:<BDF>/modalias`
MOD=`modprobe -R $MODALIAS | head -n 1`
echo 0000:<BDF> > /sys/bus/pci/drivers/$MOD/bind
See also [here][assign_devices].
### How do I install Flash in a Debian qube? ### How do I install Flash in a Debian qube?