My computer specs are:

  • Graphics: Intel® Haswell Mobile
  • Processor: Intel® Core™ i7-4702MQ CPU @ 2.20GHz × 8

I have just reinstalled Ubuntu 16.04 on my Lenovo E540 laptop and am loving it, except for the black screen I get after suspending/closing and reopening my laptop, without anything I can do but restarting it by force (not even Ctrl-Alt-Delete works).

I am aware that this thread already exists, but there seems to be no working answer yet for Ubuntu 16.04, other than Yugi's answer to this thread, which to me sounds like hocus pocus:

Again, it really depends what you want to do. If you are going to code CUDA, bumblebee might be useful if you run the IDE with bumblebee.

What does that mean?

Finally I have tried to update the BIOS, which did not work.

For now I simply do not use the Suspend button, and I have set the power settings to do nothing when lid is closed.

How can I fix the issue?

  • Welcome to Ask Ubuntu! Does your laptop have a dual GPU setup? I.e. NVIDIA and Intel cards? The question you linked clearly refers to that situation. – Andrea Lazzarotto Aug 22 '16 at 18:50

You just have to press Space, like when Windows goes to sleep

  • Yes, the screen is supposed to go black after waking from sleep, and it should wake up when pressing space or enter, unless there's a more serious problem. OP said ctrl-alt-del doesn't work. – spacelander Aug 22 '16 at 13:12

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