On 03/18/2017 05:21 PM, Unman wrote:
> On Sat, Mar 18, 2017 at 08:59:29AM -0700, Grzesiek Chodzicki wrote:
>> W dniu sobota, 18 marca 2017 15:08:35 UTC+1 użytkownik Unman napisał:
>>> On Sat, Mar 18, 2017 at 03:41:49AM -0700, Grzesiek Chodzicki wrote:
>>>> I've experienced this issue myself and I saw some people complaining about 
>>>> it on the mailing list. Sometimes Qubes takes forever to poweroff.
>>>> The issue is caused by the fact that for some unknown reason machines with 
>>>> PCI devices attached take forever to shutdown and sometimes need to be 
>>>> manually killed from within VM Manager. After manually killing them, the 
>>>> system will shutdown normally.
>>>> So, here's the fix:
>>>> In Dom0 run qvm-prefs -s sys-net pci_e820_host false
>>>> Repeat that for sys-usb and any other machine that holds a PCI device.
>>>> Your system should shut down normally after this.
>>>> No, I don't know how or why this works but I know that it solved the issue 
>>>> on my machine. Explanation welcome. I'll add this to documentation once we 
>>>> have a confirmation that this is 100% reproducible.
>>> I'd be reluctant to propose this as a tip as is, because it will almost
>>> certainly break networking for some users.
>>> We specifically set pci_e820 to address user problems. I don't know what
>>> the intersection is between those for whom this is a fix and those for
>>> whom shutdown is slow/doesn't happen.
>>> Have you tried the solution suggested here before of shutting down other
>>> vms first, then sys-usb and sys-net? Andrew, I think, posted a simple
>>> script that he uses. I suspect that that will have more impact with
>>> fewer consequences than this proposal, but user experience will be key
>>> here: comments ?
>> Yes, I did try that, this is how I found out that on my system it is not 
>> possible to cleanly shut down VMs that hold PCI devices. If I try shutting 
>> down sys-net the VM Manager hangs for a few minutes, then the entire system 
>> stops responding then the machine gets killed, then VM manager throws an 
>> exception and then system becomes responsive again. After setting 
>> pci_e820_host to False I can cleanly shutdown sys-net and sys-usb just like 
>> any other VM.
> So that sounds very system specific. Why not put together a tip
> incorporating Andrew's script ( which will help on almost all
> machines), and then yours as a special case to be used where that
> doesnt help?
That's the point, I don't know whether this is specific to my machine
but I don't have another PC to test so I posted this here so other
people can try it and see if that alleviates the issue.

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 qubes-users+unsubscr...@googlegroups.com.
To post to this group, send email to qubes-users@googlegroups.com.
To view this discussion on the web visit 
For more options, visit https://groups.google.com/d/optout.

Reply via email to