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My pc works fine. I can boot it up properly but it always decides to get stuck on a purple screen for around 15secs. After this text "ubuntu" with the dots come up in a low-ish quality and then I can finally log in and do what I want.

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Your computer is booting Ubuntu during those 15 seconds. You can see a detailed log of what was happening during boot by viewing the file /var/log/syslog

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  • What should I look for in it?
    – user874212
    Sep 24, 2018 at 12:25
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    Each line should contain a timestamp which gives you a view of what things were happening during boot. You can also look to see if anything is blocking the boot process like a network timeout or waiting on a piece of hardware. If you're not running an SSD a boot time of 15 seconds seems very reasonable. Before boot you can also hold down Shift and press E to modify the boot command in Grub removing the "quiet splash" options which will show you while booting exactly what is happening instead of showing the splash screen.
    – Kristopher Ives
    Sep 24, 2018 at 12:29
  • From /var/log/syslog I found a long line of \00\00\00\00. The line above this was Sep 25 23:27:05 gottaslay kernel: [ 6168.928624] audit: type=1400 audit(1537907225.320:90718): apparmor="DENIED" operation="ptrace" profile="snap.discord.discord" pid=4706 comm="Discord" requested_mask="trace" denied_mask="trace" peer="unconfined" and underneath Sep 25 23:28:07 gottaslay systemd-modules-load[290]: Inserted module 'lp'
    – user874212
    Sep 25, 2018 at 20:52
  • Sep 26 15:51:51 gottaslay systemd[1]: Stopping Tool to automatically collect and submit kernel crash signatures... It seems module "lp" has something to do with this? Sep 26 15:52:39 gottaslay systemd-modules-load[292]: Failed to find module 'lp'
    – user874212
    Sep 26, 2018 at 13:00
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    I entered sudo mokutil --disable-validation. in terminal and then did mokutil --sb-state to see whether secure boot is on or not and received SecureBoot disabled.
    – user874212
    Sep 26, 2018 at 15:33

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