I have Ubuntu Studio 20.04 installed.
The included Memtest86+ 5.01 freezes at 55% on test #2 every single time.
Memtest86+ 4.20 from an Ubuntu 14.04 DVD passes without error.
Memtest86+ 5.31b downloaded and burned to a CD-RW passes without error.
I have also encountered the issue where Memtest86+ 5.01 freezes on many machines with SMP activated. I do not trust v5.01 to give reliable results any more.
I have a similar problem.
I have Ubuntu Studio 20.04 installed.
The included Memtest86+ 5.01 freezes at 55% on test #2 every single time.
Memtest86+ 4.20 from an Ubuntu 14.04 DVD passes without error.
Memtest86+ 5.31b downloaded and burned to a CD-RW passes without error.
I have also encountered the issue where Memtest86+ 5.01 freezes on many machines with SMP activated. I do not trust v5.01 to give reliable results any more.