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Date: Thu, 6 Jul 2017 21:41:36 +1000 From: Tom Lanyon <tom@...shoeco.com> To: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>, Linux ACPI <linux-acpi@...r.kernel.org>, Linux PM <linux-pm@...r.kernel.org>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Darren Hart <dvhart@...radead.org>, LKML <linux-kernel@...r.kernel.org>, Mika Westerberg <mika.westerberg@...ux.intel.com>, Mario Limonciello <mario.limonciello@...l.com>, Jérôme de Bretagne <jerome.debretagne@...il.com>, "Zheng, Lv" <lv.zheng@...el.com>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on recent systems 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@...ux.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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