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I have an Ubuntu 17.04 instance that randomly locks up. Nothing responds so I have to turn off the PC using the power button.

I've realised that the issue starts when I try to reboot my computer... Sometimes the wifi stops working for like 15 seconds and then asks me for the wifi password.

enter image description here

Zanna
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B. Amine
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2 Answers2

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Check to make sure that you have intel-microcode installed...

sudo apt-get update
sudo apt-get install intel-microcode

Go to www.memtest86.org and download the free memory test and run it at least one complete pass... more if you have the time. If it freezes during the test, then you have a hardware problem. ie: bad memory, or something else.

Update #1:

Do you have an encrypted swap?

heynnema
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Complete freeze can mean only 1 thing: any of all the drivers got stuck. This may be a faulty hardware or a faulty driver.

In practice, the first offender is an exotic hardware.

The second is faulty RAM. Use memtest to check it.

Then, Try removing all PC components that you can temporarily live without, like sound card or whatever.

Next candidate is a video card, because it is a most complicated piece of PC. If you have a CPU video card, or and old video card, try switching to it to see if the problem goes.

Barafu Albino
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