On 15/09/2022 15:54, Rodrigo Vivi wrote:
On Thu, Sep 15, 2022 at 10:40:59PM +0800, Daniel J Blueman wrote:
On Thu, 15 Sept 2022 at 22:09, Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> wrote:
On Thu, Sep 15, 2022 at 09:08:08PM +0800, Daniel J Blueman wrote:
Dear Intel et al,
With a HP Spectre x360 16 16-f1xxx/891D (Intel i7-1260P) with an Arc
A370M GPU [1] running the latest Ubuntu 22.10 5.19.0-15-generic
kernel, we see:
i915 0000:03:00.0: Your graphics device 5693 is not properly supported
by the driver in this kernel version. To force driver probe anyway,
use i915.force_probe=5693
Since the GPU is unmanaged, battery life is around 30% of what it
could be. Unsurprisingly, adding i915.force_probe=5693 causes
additional issues. Given a lack of BIOS option to disable the GPU, is
there any advice for Linux support or at least putting the GPU into
D3? I see only Windows drivers on the official support page [2], and
Linux 6.0-rc5 isn't buildable [3].
I believe this is what you are looking for:
echo auto | sudo tee /sys/bus/pci/devices/0000\:03\:00.0/power/control
In Linux the default is to keep the unmanaged devices in D0.
But changing the rpm to auto should transition the device to D3.
You can go further and check with the lspci -vv if there are other
unmanaged devices in the same pci root tree and also add them to the
'auto' rpm so you can even achieve D3cold in that whole device, what
gives you extra power savings.
I hope this helps for now.
Yes, I was also hoping this would work as we see D3hot is supported:
# echo auto > /sys/bus/pci/devices/0000\:03\:00.0/power/control
# lspci -vvvs 03:00.0
...
Capabilities: [d0] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0+,D1-,D2-,D3hot+,D3cold-)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
^^
However it stays in D0 with PME disabled as we see. "Kernel modules:
i915" may suggest the i915 driver holds a reference to it, preventing
the transition.
Oh, yes. I was thinking more on using the command line I sent when
the i915 is not probed. i.e. without using the force probe. your first
scenario.
Could it help to bind DG2 to vfio-pci and so prevent i915 touching it?
Regards,
Tvrtko
