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I have an Acer Aspire E 15 laptop that I use at home most of the time, connected to an HDMI monitor and USB keyboard and mouse. I have Windows, Ubuntu and openSUSE installed on it. I would like to use it with the lid closed, but I always had to open its lid at least for powering it up and selecting the operating system I wanted to use during boot. GRUB2 always showed only on the laptop screen, even if the HDMI monitor was plugged on. There was no way to get GRUB2 displayed on my HDMI monitor.

  • My intention when I asked and answered at the sime time was to share both the problem I was facing and its solution - which was not obvious - just in case anyone is looking for help. Maybe I can help someone with my answer. Also, I comment many other solutions that I found that have not worked for me but have worked for others, maybe someone that comes to this page wants to try them. – Antonio Vinicius Menezes Medei Sep 26 '16 at 12:36
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Here is what worked for me. Make sure your HDMI monitor is connected before turning your laptop on. Try to close the lid right after you press the laptop's power button. Your HDMI monitor will show the BIOS/UEFI splash screen and then GRUB2.

If that works for you, you can also try to place a small refrigerator magnet on the sensor your laptop uses to detect its lid is closed, so you can trick your laptop into thinking it's always closed. Actually I did not try doing that, but it sounds interesting. Later I will try it and post here if it works.

Other possible solutions

Before coming to that solution, I've read many pages. None of the solutions proposed by other people worked for me, but I'm going to list some of them here because maybe someone wants to try them:

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