[Bug 1809556] Re: zram freezes computer

[Elvis de Freitas Souza]

I think the above link will not gonna help because it's related to
computer freezing when RAM is full, my computer wasn't with high usage
of RAM on the freeze moment, it was using something about 50%

Another point is that zram makes computer use less RAM and my problem
gone when I uninstalled zram, so the issue definitely is not related to
high memory usage

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https://bugs.launchpad.net/bugs/1809556

Title:
  zram freezes computer

Status in zram-config package in Ubuntu:
  Confirmed

Bug description:
  I bought a new setup and since then my computer is having random
  freezes, the machine stops respond until you do a hard reset (pressing
  reset button)

  * I noticed that this issue is more common when running java programs, i.e. Intellij, Spring Boot applications (I'm a java developer) and using chrome.
  * I also noticed issue is not related to high CPU usage

  Steps I did to reproduce the issues

  * Turned computer on
  * Started Intellij
  * Opened chrome and let a video playing
  * Started a java application with a considerable consume of memory (500MB)
  * Keep starting and stopping that application

  I did the following tests and had the same results

  * Tested on ubuntu 16.04, 18.04, 18.10 with it's original kernels, also tested on kernel 4.19
  * Tested with nouveau (With and without GPU installed)
  * Tested with Nvidia proprietary drivers
  * Tested with Nvidia ubuntu repository drivers
  * Installed latest BIOs
  * Removed one of my two memories

  Steps I did to stress my computer and got no issues

  * Ran memtest (got no issues)
  * Stressed my computer and RAM with stress tool (got not issues)

  Steps to fix the problem

  * apt purge -y zram-config
  * Restart the computer

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