had a odd problem with the ubuntu xps coming out of power saving, well it would wake up and then just lock, i could switch to a terminal and reboot but thats a pain  … so quick look at the logs showed me this

Jun 11 16:02:34 shanghai kernel: [    0.000000] PM: Registered nosave memory: 00000000ff980000 – 0000000100000000
so googled this and got this answer:

sudo apt-get remove –purge casper

sudo update-initramfs -u


Then try to hibernate and if there is a problem, respond with 

sudo swapon -s
free
grep ‘PM:’ /var/log/syslog

and now i get this!

Jun 11 16:19:21 shanghai kernel: [ 1010.906741] PM: Syncing filesystems … done.

Jun 11 16:19:33 shanghai kernel: [ 1013.122352] PM: suspend of devices complete after 1427.729 msecs

Jun 11 16:19:33 shanghai kernel: [ 1013.122482] PM: late suspend of devices complete after 0.128 msecs

Jun 11 16:19:33 shanghai kernel: [ 1013.202358] PM: noirq suspend of devices complete after 79.783 msecs

Jun 11 16:19:33 shanghai kernel: [ 1013.203211] PM: Saving platform NVS memory

Jun 11 16:19:33 shanghai kernel: [ 1013.413633] PM: Restoring platform NVS memory

Jun 11 16:19:33 shanghai kernel: [ 1013.601208] PM: noirq resume of devices complete after 126.458 msecs

Jun 11 16:19:33 shanghai kernel: [ 1013.601335] PM: early resume of devices complete after 0.099 msecs

Jun 11 16:19:33 shanghai kernel: [ 1013.712163] PM: Device 00:06 failed to resume: error -19

Jun 11 16:19:33 shanghai kernel: [ 1014.677310] PM: resume of devices complete after 1074.739 msecs

id say thats fixed!
 

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