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I got new Dell Vostro 3480 laptop. It had Ubuntu 18.04 preinstalled. I updated to 18.04.3. With 18.04.3, after the BIOS, the screen freezes and it does not boot. The login works sometimes, but does not work other times.

What could be wrong? I have built-in intel graphics. I tried following things, 1. Setting WaylandEnable=false in /etc/gdm3/custom.conf file 2. Setting lightdm as display manager 3. Disabling splash screen on boot-up, so I can see boot console messages. But there are no console messages. The screen freezes before console messages are displayed.

I have now reverted back to 18.04 and I don't experience any problem with 18.04.

What could be the issue with 18.04.3, any ideas?

Thanks

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1 Answers1

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This is problem due to intel microcode issue. There are two solutions to this problem,

  1. add a instruction dis_ucode_ldr in your grub file,
  2. Update the BIOS. The updated BIOS seems to be working for my Dell Vostro.

You can see more details in a comprehensive forum post Ubuntu 18.04.2 boot stuck on purple screen after updates

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