Comment 6 for bug 1299821

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Sean Brisbane (s-brisbane1) wrote : Re: [LENOVO 4236SGS] suspend/resume failure

Unrelated to this bug, I have also discovered that alt+sysreq RIE are all disabled for the mainline and trusty 'head' kernel (3.13.0-20-generic) by default:

cat /proc/sys/kernel/sysrq
176

Mentioned here:
https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1025467

Also, if I suspend while the focus is on tty1 ( a text console ) rather than tty7 (GUI), the text console operates fine when I resume from pm-suspend until I switch back to tty7. At that point the system locks up again.