Displaying 10 results from an estimated 10 matches for "acpi_rev_dmi_table".
2019 Nov 20
4
[PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...Windows 8
> > started supporting it). Maybe Dell added check for Linux because at that
> > time Linux did not support it.
> >
>
> the point is, it's not checking it by default, so by default you still
> run into the windows 8 codepath.
Well you can add the quirk to acpi_rev_dmi_table[] so it goes to that
path by default. There are a bunch of similar entries for Dell machines.
Of course this does not help the non-Dell users so we would still need
to figure out the root cause.
> > In case RTD3 is supported it invokes LKDS() which probably does the L2
> > or L3 entry...
2019 Oct 22
2
[PATCH v3] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...r resource PGOF() method has
this:
If (((OSYS <= 0x07D9) || ((OSYS == 0x07DF) && (_REV == 0x05)))) {
...
}
If I read it right, the later condition tries to detect Linux which
fails nowadays but if you have acpi_rev_override in the command line (or
the machine is listed in acpi_rev_dmi_table) this check passes and does
some magic which is not clear to me. There is similar in PGON() side
which is used to turn the device back on.
You can check what actually happens when _ON()/_OFF() is called by
passing something like below to the kernel command line:
acpi.trace_debug_layer=0x80 acpi...
2019 Nov 20
2
[PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...for Linux because at that
> > > > time Linux did not support it.
> > > >
> > >
> > > the point is, it's not checking it by default, so by default you still
> > > run into the windows 8 codepath.
> >
> > Well you can add the quirk to acpi_rev_dmi_table[] so it goes to that
> > path by default. There are a bunch of similar entries for Dell machines.
>
> OK, so the "Linux path" works and the other doesn't.
>
> I thought that this was the other way around, sorry for the confusion.
>
> > Of course this does no...
2019 Oct 22
0
[PATCH v3] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...,
the fallback path uses P0LD indeed. That's actually the only register
of those being documented by Intel afaik.
> If I read it right, the later condition tries to detect Linux which
> fails nowadays but if you have acpi_rev_override in the command line (or
> the machine is listed in acpi_rev_dmi_table) this check passes and does
> some magic which is not clear to me. There is similar in PGON() side
> which is used to turn the device back on.
>
> You can check what actually happens when _ON()/_OFF() is called by
> passing something like below to the kernel command line:
>
>...
2019 Nov 20
0
[PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...orting it). Maybe Dell added check for Linux because at that
> > > time Linux did not support it.
> > >
> >
> > the point is, it's not checking it by default, so by default you still
> > run into the windows 8 codepath.
>
> Well you can add the quirk to acpi_rev_dmi_table[] so it goes to that
> path by default. There are a bunch of similar entries for Dell machines.
OK, so the "Linux path" works and the other doesn't.
I thought that this was the other way around, sorry for the confusion.
> Of course this does not help the non-Dell users so we...
2019 Nov 20
0
[PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...> > > time Linux did not support it.
> > > > >
> > > >
> > > > the point is, it's not checking it by default, so by default you still
> > > > run into the windows 8 codepath.
> > >
> > > Well you can add the quirk to acpi_rev_dmi_table[] so it goes to that
> > > path by default. There are a bunch of similar entries for Dell machines.
> >
> > OK, so the "Linux path" works and the other doesn't.
> >
> > I thought that this was the other way around, sorry for the confusion.
> >
&g...
2019 Oct 21
1
[PATCH v3] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
On Mon, Oct 21, 2019 at 5:46 PM Mika Westerberg
<mika.westerberg at intel.com> wrote:
>
> On Mon, Oct 21, 2019 at 04:49:09PM +0200, Karol Herbst wrote:
> > On Mon, Oct 21, 2019 at 4:09 PM Mika Westerberg
> > <mika.westerberg at intel.com> wrote:
> > >
> > > On Mon, Oct 21, 2019 at 03:54:09PM +0200, Karol Herbst wrote:
> > > > > I
2019 Nov 20
0
[PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...for Linux because at that
> > > > time Linux did not support it.
> > > >
> > >
> > > the point is, it's not checking it by default, so by default you still
> > > run into the windows 8 codepath.
> >
> > Well you can add the quirk to acpi_rev_dmi_table[] so it goes to that
> > path by default. There are a bunch of similar entries for Dell machines.
> >
> > Of course this does not help the non-Dell users so we would still need
> > to figure out the root cause.
>
> I think I asked you to test the PCIe delay patch and i...
2019 Nov 20
1
[PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
...ting it). Maybe Dell added check for Linux because at that
> > > time Linux did not support it.
> > >
> >
> > the point is, it's not checking it by default, so by default you still
> > run into the windows 8 codepath.
>
> Well you can add the quirk to acpi_rev_dmi_table[] so it goes to that
> path by default. There are a bunch of similar entries for Dell machines.
>
> Of course this does not help the non-Dell users so we would still need
> to figure out the root cause.
I think I asked you to test the PCIe delay patch and it did not help but
I wonder...
2019 Nov 20
2
[PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
On Wed, Nov 20, 2019 at 01:11:52PM +0100, Karol Herbst wrote:
> On Wed, Nov 20, 2019 at 1:09 PM Mika Westerberg
> <mika.westerberg at intel.com> wrote:
> >
> > On Wed, Nov 20, 2019 at 12:58:00PM +0100, Karol Herbst wrote:
> > > overall, what I really want to know is, _why_ does it work on windows?
> >
> > So do I ;-)
> >
> > > Or what are