On Thu, May 03, 2018 at 09:56:52AM +0100, Edd Barrett wrote: > Hi, > > On Fri, Jan 12, 2018 at 11:40:31AM +0000, Edd Barrett wrote: > > For the month or so I've had it (usually updating my snapshot every week > > or so) suspend has been a bit flaky. Often it does zzz and wake fine, > > but occasionally (say 1 time out of 5), something goes wrong. Either: > > Sorry to dig up an old thread. Just wanted to mention that my 5th > generation X1 is still frequently failing to wake from suspend on newer > snapshots. > > Cheers > > -- > Best Regards > Edd Barrett > > http://www.theunixzoo.co.uk >
You can help diagnose this yourself. If the machine has a visual indicator of sleeping/waking (like a blinking led), move the SST_WAKING acpi_indicator calls around in the resume path so you can see where it's getting stuck. If you get to the point that it's resuming devices and can't figure out which device is broken, you can turn a "hang" into a "reset" by placing calls to cpu_reset in various places, to let you know where it gets to. If it resets, you know you got that far and can move the reset to later devices. that way you can narrow down the area where it's hanging. You can also use the vPro serial-over-lan and output messages there if your machine supports that. These sorts of techniques are what I used when diagnosing things when we were first implementing suspend and hibernate, when the console is nonresponsive or black or unavailable. -ml
