[Bug 2072153] Re: LUKS/Cryptsetup shows blank screen on boot in noble

[Håvard H. Garnes]

I'm using the internal screen, and I have no other screens attached. The
internal screen is a 3840x2160 resolution one.

No change if I set plymouth.use-simpledrm.

It could be noted, though, that when I reboot from a working state, I
see the splash screen on shutdown after X is shut down before the
machine boots. That is, there is something that works once X has run
proper. Moreover, if I remove "quiet" from the boot line (and enter my
password blindly), after a while the screen blinks black" and I see the
boot messages in high resolution (i.e. small font) for half a second on
the screen right before I get dumped into the X login screen.

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https://bugs.launchpad.net/bugs/2072153

Title:
  LUKS/Cryptsetup shows blank screen on boot in noble

Status in plymouth package in Ubuntu:
  Incomplete

Bug description:
  After upgrading from Ubuntu 23.10 to 24.04, I get a blank screen at
  boot instead of the password prompt. I can enter my password blindly
  and boot into X as usual, but nothing I have tried for getting the
  password prompt has worked.

  I'm on a Thinkpad T580, with an NVIDIA GeForce MX150. I'm on the
  nvidia driver version 555.52.04 from the graphics drivers ppa.

  I have tried various combinations of:
  - not having driver version 555 installed (It was left at the old version on upgrade
  - modding grub to say nosplash, gfxmode=auto or gfxmode=text or gfxmode=wxh (all gave me text, but also a kernel panic about synaptics drivers)
  - modding grub to say nomodeset, and/or nvidia.modeset=0

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