Hi Paul, On Fri, 2024-05-24 at 06:53 +0200, Paul Menzel wrote: > Dear Mario, dear Linux folks, > > > Am 22.05.24 um 18:37 schrieb Mario Limonciello: > > On 5/22/2024 10:52, Paul Menzel wrote: > > > > On the Intel Kaby Lake laptop Dell XPS 13 9360, > > > `/sys/kernel/debug/pmc_core/slp_s0_residency_usec` does stay 0 even > > > after a s2idle suspend/resume cycle. > > > > It won't change your numbers but FWIW you can also read from > > > > $ cat /sys/power/suspend_stats/last_hw_sleep > > > > which is also accessible under kernel lockdown. > > > > > > > > $ sudo dmesg > > > […] > > > [ 0.000000] DMI: Dell Inc. XPS 13 9360/0596KF, BIOS 2.21.0 > > > 06/02/2022 > > > […] > > > [10176.745124] PM: suspend entry (s2idle) > > > [10176.757275] Filesystems sync: 0.012 seconds > > > [10176.769118] Freezing user space processes > > > [10176.771693] Freezing user space processes completed (elapsed 0.002 > > > seconds) > > > [10176.771710] OOM killer disabled. > > > [10176.771714] Freezing remaining freezable tasks > > > [10176.773487] Freezing remaining freezable tasks completed (elapsed > > > 0.001 seconds) > > > [10176.773504] printk: Suspending console(s) (use no_console_suspend > > > to debug) > > > [10176.948337] ACPI: EC: interrupt blocked > > > [10176.951016] intel_pch_thermal 0000:00:14.2: CPU-PCH is cool [48C] > > > [10181.281827] ACPI: EC: interrupt unblocked > > > $ sudo more /sys/kernel/debug/pmc_core/slp_s0_residency_usec > > > 0 > > > > > > Is that expected? > > > > Is it a regression? If so; probably it's worth bisecting. > > Sorry, I do not know. It’s the first time [1] I heard about this file, > and that fwts [2] checks it. Do you remember, if Dell has any public > logs from testing, containing `slp_s0_residency_usec`? > > > If it's not a regression IIUC you should probably run > > https://github.com/intel/S0ixSelftestTool for assistance in next steps > > on debugging why this is happening. > > Thank you for the pointer. Please find the log file from `sudo > ./s0ix-selftest-tool.sh -s` attached. Some PCIe ports are flagged. > > > Kind regards, > > Paul The report suggests checking the kernel log for any error loading drm firmware. If the firmware is loaded properly, you should see a message similar to the following: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4) David > > > [1]: > https://review.coreboot.org/c/coreboot/+/81595/10/src/mainboard/cwwk/adl/Kconfig#9 > [2]: https://wiki.ubuntu.com/FirmwareTestSuite/ > > > > > PS: Some system details: > > > > > > ``` > > > $ LANG= lspci -nn > > > 00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen Core > > > Processor Host Bridge/DRAM Registers [8086:5904] (rev 02) > > > 00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics > > > 620 [8086:5916] (rev 02) > > > 00:04.0 Signal processing controller [1180]: Intel Corporation Xeon E3- > > > 1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [8086:1903] > > > (rev 02) > > > 00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB 3.0 > > > xHCI Controller [8086:9d2f] (rev 21) > > […]
