Re: 4.16-rc3 fails to resume on MacBookPro10,1 -

[Pavel Machek <pavel@ucw.cz>]

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On Sat 2018-03-03 11:00:28, Rafael J. Wysocki wrote:
> On Sat, Mar 3, 2018 at 10:24 AM, Pavel Machek <pavel@ucw.cz> wrote:
> > Hi!
> >
> > On Sat 2018-03-03 17:27:36, Andrew Worsley wrote:
> >> On 3 March 2018 at 16:41, Andrew Worsley <amworsley@gmail.com> wrote:
> >> > Basically hangs on resuming after decompressing. The last statement
> >> > displayed is "resume: Image successfully loaded"
> >> >  - I attach a photo as I can't get access to it
> >> ....
> >> > Bug https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=844788
> >> >
> >> > I couldn't get anything from the function keys with this latest kernel.
> >> ...
> >>
> >> By plugging in a USB keyboard I can get sysrq stuff to work - but
> >> stupidly the kernel disables all the useful ones so I will have to
> >> compile a new kernel with it set to 1 so I can get some traces.
> >> Really annoyed by this default setting, presumably from debian?
> >> Wished there was a boot command line option to configure the allowed
> > options.
> >
> > So hibernation is broken on x86-64?
> >
> > Ideas for debugging:
> >
> > 1) get that sysrq to work, backtrace where it is hung would be very
> > useful.
> >
> > 2) try v4.15.
> 
> That one works for me FWIW.
> 
> > 3) try without KPTI enabled. Probably noone knows how it interacts
> > with that...
> >
> > (And 4), we should really start doing some periodic testing of hibernation).
> 
> I do that, but the period is not particularly short ...

Ok, I've just tested linux-next, and it works ok for me on thinkpad
x60. (But that's probably rather different configuration from the
macbook).

Unfortunately, I could not deduce anything useful from the
backtraces. Andrew, could you try v4.15 with KPTI disabled ?

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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