On Sat 2018-03-03 11:00:28, Rafael J. Wysocki wrote: > On Sat, Mar 3, 2018 at 10:24 AM, Pavel Machek wrote: > > Hi! > > > > On Sat 2018-03-03 17:27:36, Andrew Worsley wrote: > >> On 3 March 2018 at 16:41, Andrew Worsley 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