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I have a Dell Precision 3530 running stock ubuntu 18.04 LTS (I got it with this installed). After recent update my system won't boot using latest kernel available:

linux 4.15.0-1073-oem

But instead boots fine if selecting from grub

linux 4.15.0-1069-oem

or

linux 4.15.0-1021-oem

Has anyone else experienced this? I tried to update manually after seeing this but it didn't solve, moreover I noticed this while doing sudo apt-get update:

Err:25 http://dell.archive.canonical.com/updates bionic-dell Release.gpg The following signatures were invalid: BADSIG F9FDA6BED73CDC22 Canonical Archive Automatic Signing Key

EDIT 1 I noticed that even with other kernel version it often doesn't boot. I don't know why sometimes it does, but following this question I am able to boot adding dis_ucode_ldr to GRUB launch command each time I want to boot. I guess next step is to wait for a dell update.

EDIT 2 Trying to use a more recent kernel (Kernel 5.3) as suggested below again seems to fix the problem, but it really does not. After a couple of reboots, still stuck at purple screen.

a_bet
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1 Answers1

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Ubuntu 18.04.4 LTS moved to kernel 5.3. You could try to use it by

sudo apt-get install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04

xorg also will be upgraded.

https://wiki.ubuntu.com/Kernel/LTSEnablementStack

History of 18.04 kernels:

  • Ubuntu 18.04 - 4.15
  • Ubuntu 18.04.2 - 4.18
  • Ubuntu 18.04.3 - 5.0
  • Ubuntu 18.04.4 - 5.3
Serhii Trykoza
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  • thanks, this seems to solve. But why he new kernel wasn't included in the updates I installed? – a_bet Mar 15 '20 at 15:36
  • Actually it is still giving the same problems as before and the fix is still the one I linked. The problem might not be the kernel then. – a_bet Mar 15 '20 at 17:53
  • @a_bet could you please test your hardware: Memtest86+ (included in boot menu GRUB) for RAM, Victoria for HDD/SSD? Also check HDD/SSD free space. – Serhii Trykoza Mar 15 '20 at 19:11
  • Hi @Serhii thank for the comment. I'm on UEFI so I don't see memtest86 in grub. I found this (https://www.memtest86.com/download.htm) do you think it's a trustable source? I ran large tests using the diagnostic tools in my firmware from Dell (access from UEFI) and everything seems to be ok on HW side. SSD is only half full – a_bet Mar 16 '20 at 09:24