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. With the i915 loaded I'd like to see the dmesg and a few of the debugfs files under: /sys/kernel/debug/dri/0 like: i915_runtime_pm_status, i915_power_domain_info > > Dan > -- > Daniel J Blueman
