Hi tetrahedra,
> The original error ("unable to reset PCI device...") still occurs when trying
> to start disp-sys-usb.Despite have the "no-strict-reset" set to True, you will continue to see the "Unable to reset PCI device: ... no FLR, PM reset or bus reset available" "error" message each time you are trying to attach a PCI device that does not support the FLR (Function Level Reset) [2]. The "no-strict-reset" enablement patch [1] allows you (libvirt) to assign a PCI device to domU, even when the device does not support any reset method . The error message is kept there for the informational purposes so this way a person may become aware of that his PCI device may not be working as desired because it does not support any reset method, despite of which it still gets assigned to domU when "no-strict-reset" is set to True, thanks to the patch [1]. I think it'd be good to mention here the whole message from the "no-strict-reset" patch: > This allows to assign PCI device to some VM, even when the device does not > support any reset method. This may be dangerous in some cases (especially > when the device is later assigned to some other VM). But in some cases it > still makes sense - for example when the device is assigned to the same VM > whole the time. To check if your PCI device has a FLR function, run: $ sudo lspci -vv -s 00:14.0 If you see output with "FLReset-" then your PCI device does not support FLR function. If output has "FLReset+" then it does. There are very few PCI devices which support FLR function. [1]: https://github.com/QubesOS/qubes-core-libvirt/blob/release4.0/patches.qubes/0010-Add-nostrictreset-attribute-to-PCI-host-devices.patch#L160 [2]: https://libvirt.org/git/?p=libvirt.git;a=blob_plain;f=src/util/virpci.c;hb=d7acab0bfeec5c9ae75db21b3519486e3586250c Kind regards, Andrey Arapov -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/eec1c63f-840b-43c7-ab0b-f186e9900b3c%40localhost.
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