Comment 845 for bug 1690085

Hi, I was encountering this issue in a frequent basis. I tried several methods listed all across the internet to solve the "soft lockup" specially while using rsync to copy data from one disk to another.

At some point, I ran memtest86 to check if there was a memory problem. I have 4 DIMM installed, of 16GB. The BIOS settings were mostly set to auto for most fields. Memtest86 failed 25% of the test, which is really bad.

I noticed that Memtest86 reported metadata for each memory about the voltage setting to 1.350v. I noticed the Auto Setting in the bios had set those values to 1.200v instead.

After updating that value, I ran the test suite again, none failed. Ran rsync over a large directory, and did not trigger the soft lockup.

tldr; Make sure your RAM is correctly configured with the manufacturer recommended settings instead of Auto setting from the BIOS, this goes for both frequency and voltage.