Messages in this thread | | | From | Tom Lanyon <> | Date | Thu, 6 Jul 2017 21:41:36 +1000 | Subject | Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on recent systems |
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Sorry for the slow response - I've just had a chance to run some more tests.
I tried to disable the SD card reader in the BIOS as suggested earlier in the thread, but that didn't seem to make a significant change. More inline below.
On Tue, 2017-06-27 at 17:03 +0200, Rafael J. Wysocki wrote: > I would carry out s2idle under turbostat to see how much PC10 > residency is there while suspended. That may be a significant factor. > > Most likely there is a device preventing the SoC from reaching its > deepest low-power states under Linux on your system and it needs to be > identified and dealt with.
I'm not entirely sure how turbostat records metrics so wasn't sure how to measure correctly. I kept turbostat running while performing a s2idle and recorded the output:
https://gist.githubusercontent.com/tomlanyon/3238e742a155e7fa27658aa0960bdee4/raw/98b5f050e5eb2f88af47b2afd17080e7dd85d20f/turbostat
I'm not familiar with the output format - I see some high percentages of C10, but nothing in Pkg%pc10. Which is of interest in this scenario?
On 28 June 2017 at 02:14, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: > Also make sure that you have no FW loading error for i915. > #dmesg | grep i915 > It will display that Guc FW was loaded etc.. > The latest FW can be downloaded from > https://01.org/linuxgraphics/downloads/firmware > > If you don't see PC10 residency, we can try something more.
I've confirmed that there's no FW errors for the i915.
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