so I just uninstall KDE Neon because of a problem and tried to install it again but i got integrity: Problem loading X.509 certificate -65 and the boot stuck/freeze. I thought it was KDE Neon error, but then I tried installing ubuntu 19.10 and got the same error. I even clean install my windows and delete other partitions, but it doesn't do anything, I keep getting the same error. What should I do ? Thanks in advance.

I've tried with 18.04 too and same result, strange, these iso files have no problem before.

I cleared my USB using RosaImageWriter, formatted it, and then I made my USB bootable using PowerISO, and choose install with safe graphics. The error still persists, but now I can boot Ubuntu 19.10 without getting stuck.

I get a black screen with this error:

[    3.173272] integrity: Problem loading X.509 certificate -65 
[    3.173311] integrity: Problem loading X.509 certificate -65 

I had the EXACT same problem! At the end of the story, after several failed attempts to install Ubuntu on my machine, I started to suspect the HDD (which was very unpleasant, since I had just bought the PC). In the end, the problem was actually the HDD.

To run disk tests on your HDD, boot to a virtual Ubuntu machine and open the terminal.

To discover the path of your Linux partition, type:

sudo fdisk -l

The output should contain something like this:

Device         Start       End   Sectors   Size Type 
/dev/sdb1       34        32767      32734    16M Microsoft reserved
/dev/sdb2      32767 1025777663 1025744896 489,1G Microsoft basic data
/dev/sdb3 1025777663 1026828287    1050624   513G EFI System
/dev/sdb4 1026828287 1953523711  926695424 441.9G Linux filesystem

The partition that is giving problems, in my case, is the /dev/sdb4.

Then run:

sudo badblocks -sv /dev/sdb

And wait to see if there is errors in your partition. If yes, now you know what is causing the problem.

After this, run:

sudo fdck /dev/sdb4

If you notice an error in your HDD, you should change it as soon as possible. Hope this helps!

  • how much time does badblocks takes to run on 1 tb hard disk sata – beta_me me_beta Jun 2 '20 at 2:18
  • it's a reaaaly slow process! just be patient, it will work eventually haha @beta_meme_beta – Carolina Naccarato Jun 8 '20 at 12:51

I fixed this message into my laptop BIOS. All you need to do is :

  1. Disable the Secure Boot

  2. Reset Setup Mode ( this function is in Bios )

After that, just exit Bios and save changes.

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