@pawel.jasinski I observed same behavior and independently arrived to the same conclusion.
I suspend by pressing [fn]-[f1], then close the lid and pick up the laptop. Then on the other site I resume it from suspend. Case 1 : If the lid was closed immediately after pressing the key combo, everything is fine, laptop resumes when asked. Case 2 : If the lid was closed after a few seconds after pressing the key combo, laptop hangs on resume. After force reboot it says something prevented a previous reboot from finishing. Case 3 : If the lid was closed after waiting for the suspend to complete (power led blinking), everything is fine, laptop resumes when asked. I have been observing this behavior since Ubuntu 14.04 . Case 2 seldom happens, so I can't be sure it didn't happen with Ubuntu 13.10 that I used on the same laptop before. ( cd /var/log/ ; zgrep "BUG" $( ls -1b syslog syslog.1 syslog.?.gz syslog.??.gz syslog.???.gz | tac ; ) ; ) syslog.57.gz:Jun 29 16:57:26 n55sf-l kernel: [ 2761.992920] kernel BUG at /build/buildd/linux-3.13.0/drivers/misc/mei/hbm.c:787! syslog.57.gz:Jun 29 16:57:26 n55sf-l kernel: [ 2761.993765] BUG: unable to handle kernel paging request at ffffffffffffffd8 syslog.44.gz:Jul 12 19:20:04 n55sf-l kernel: [50310.333339] kernel BUG at /build/buildd/linux-3.13.0/drivers/misc/mei/hbm.c:787! syslog.44.gz:Jul 12 19:20:04 n55sf-l kernel: [50310.334340] BUG: unable to handle kernel paging request at ffffffffffffffd8 syslog.32.gz:Jul 26 19:40:50 n55sf-l kernel: [93109.061480] kernel BUG at /build/buildd/linux-3.13.0/drivers/misc/mei/hbm.c:787! syslog.32.gz:Jul 26 19:40:50 n55sf-l kernel: [93109.062126] BUG: unable to handle kernel paging request at ffffffffffffffd8 syslog.28.gz:Aug 1 18:04:59 n55sf-l kernel: [19701.529305] kernel BUG at /build/buildd/linux-3.13.0/drivers/misc/mei/hbm.c:787! syslog.28.gz:Aug 1 18:04:59 n55sf-l kernel: [19701.530697] BUG: unable to handle kernel paging request at ffffffffffffffd8 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1287587 Title: [ASUSTeK Computer Inc. K53SD] suspend/resume failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1287587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
