On Fri, 16 Sept 2022 at 00:35, Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx> wrote: >> 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? Bingo! Booting with vfio-pci.ids=8086:5693 in my case left the dGPU in D3, giving the expected battery runtime. Many thanks Tvrtko, Dan -- Daniel J Blueman
