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Re: [Xen-users] dom0 USB failing with "ehci-pci: probe of 0000:00:1d.0 failed with error -110"

>>> On 19.02.16 at 09:30, <robinlee.sysu@xxxxxxxxx> wrote:
> On Thu, Feb 18, 2016 at 5:40 PM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>> (copy to xen-devel)

But then please don't cross-post (I'm therefore moving xen-users
to BC).

> The issue still exists with microcode updated.
> And on this machine, nothing 'ACPI Error' like the Debian bug was seen.
> And when max_cstate=2 is still bad, max_cstate=1 works.
> But max_cstate=1 and mwait-idle=false are different,
> which one is preferred to work around this issue?

Depends on what C-states you get the system to use with
"mwait-idle=false" (i.e. when instead the ACPI driver manages
C-states), and whether C1 there would be the trivial HLT one.
And it of course also matters how much you care about the
power consumption of your system when it's idle.


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