On 21/04/2020 16:08, Dmitry Osipenko wrote: > 21.04.2020 17:40, Jon Hunter пишет: >> >> On 21/04/2020 14:25, Dmitry Osipenko wrote: >>> 21.04.2020 12:49, Jon Hunter пишет: >>> ... >>>> I can try the above, but I agree it would be best to avoid messing with >>>> the suspend levels if possible. >>> >>> Will be awesome if you could try it and report back the result. >>> >> >> I gave it a try but suspend still fails. > > Perhaps the RPM's -EACCES is returned from here: > > https://elixir.free-electrons.com/linux/v5.7-rc2/source/drivers/base/power/runtime.c#L723 > > Which suggests that I2C is accessed after being suspended. I guess the > PCIe driver suspends after the I2C and somehow my change affected the > suspension order, although not sure how. > > Jon, could you please try to enable PM logging and post the log? Please > also post log of the working kernel version, so that we could compare > the PM sequence. > > Something like this should enable the logging: "echo 1 > > /sys/power/pm_trace" + there is RPM tracing. Unfortunately, after enabling that I don't any output and so no help there. Jon -- nvpublic
