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Ubuntu – Does the ubuntu 18.04 get stuck on the ‘purple’ screen after logging in

bootdriversloginlogin-screen

Please provide me with a detailed answer explaining why my Ubuntu 18.04 gets stuck on the purple screen after trying to log in. Is it some bug in Ubuntu or do i need to install some additional drivers or something? I have an AMD RADEON GRAPHICS Chip in my laptop (in addition to intel i5) which isn't configured yet and which might be causing this issue. Are there any commands I can use on that purple screen to get around it because right now i can only avoid it by performing a force shut down of the system using the power button.

Best Answer

There are two relevant bug reports on the "purple screen" in Ubuntu 18.04 LTS. Many people have encountered difficulties including myself. However my problem seems different than the two bug reports so there might be more in the future regarding this issue.

Here are the two bug reports:

  • [regression] Password accepted but login fails (blank purple screen and mouse pointer only)
  • [regression] Ubuntu 18.04 login screen rejects a valid password on first attempt. Usually works on the second attempt

My problem/solution not in the bug reports was this:

  • Upgrade Ubuntu 16.04 LTS to 18.04 LTS = 5 desktop environments

Related Solutions

Ubuntu – Ubuntu blank purple screen on startup

In my case I have a problem with grub rootdelay. After 20-30 sec try to hit Enter write exit (you didn't see it on screen) and hit Enter. System should run OK. Then you need to modify grub config.

But if it can't work try something else from this thread.

Boot – Fix Ubuntu 18.04.2 Boot Stuck on Purple Screen After Updates

Well I also have a Asus ZenBook UX433FA doing this issue, I was running 18.10 and did apt-get upgrade last night and broke the system.

I've since used this method livecd recovery to upgrade to 19.04 still no luck with booting. Have multiple kernels installed none of which will get past the "loading initial ramdisk". While using the above i installed kernel v5.1 with ukuu no luck either and threw errors about dkms for nvidia driver incompatible with kernel version.

Edit DMESG log

Managed to get the dmesg from a partial boot here

boot-repair log info here occasionally it will boot with errors, unsure of what info or how to gather info on these occasions though to help with debug.

Just a side note windows hadn't been loaded for about a month prior to this. I know this should probably be a comment but I don't have enough credit.

Edit 2

For anyone having a similar problem, try booting with microcode updates off: add dis_ucode_ldr to the kernel command line (from GRUB if you cannot boot) can confirm this allows for boot.

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