On Fri, Jun 14, 2019 at 4:03 AM Bjorn Helgaas wrote:
> Is it possible that this works on Windows but not Linux because they
> handle ACPI hotplug slightly differently?
>
> Martin did some nice debug [1] and found that _DSM, _PS0, and _PS3
> functions write the config bit at 0x488. The dmesg log [
On Thu, Jun 20, 2019 at 12:17 PM Michal Hocko wrote:
>
> On Thu 13-06-19 11:43:08, Christoph Hellwig wrote:
> > noveau is currently using this through an odd hmm wrapper, and I plan
> > to switch it to the real thing later in this series.
> >
> > Signed-off-by: Christoph Hellwig
> > ---
> > mm/m
Hi Bjorn,
I managed to trigger the issue from userspace without having to call
into any ACPI code. Wrote a little script[1] which essentially does
(and prints) this (I've added some comments):
PCI SCAN
# set PCIe link speed to 2.5. Bug doesn't trigger with 5.0 or 8.0
# NVA is a small lib we use t
https://bugs.freedesktop.org/show_bug.cgi?id=75985
--- Comment #79 from Daniel Drake ---
Thanks, you're right, the value changes based on HDMI connector status.
So for this platform, \_SB.PCI0.PEG0 has a PG00 PowerResource that will set the
magic bit in _ON, and likewise \_SB.PCI0.PEG0.PEGP has
