cannot boot with linux-libre>=5.7, amdgpu and cryptsetup

edgar at edgar at
Mon Jul 13 15:02:17 UTC 2020

I did some other tests:

1 Loading amdgpu early in the grub

   │ GRUB_PRELOAD_MODULES="amdgpu ...
   Listing 1: Adding amdgpu as preloaded module in `/etc/default/grub' 
does not have an effect (blank screen, no cryptsetup prompt)

2 Removing amdgpu

   │ MODULES=()
   Listing 2: Removing amdgpu in `/etc/mkinitcpio.conf' and uninstalling 
`xf86-video-amdgpu' shows up to some lines of OpenRC.
   │ # pacman -Rnucs xf86-video-amdgpu

2.1 Adding `nomodeset' to the kernel line

   Adding `nomodeset' to the kernel line eventually clears the screen and 
shows a static underscore at the top left corner. If I type-in my user 
password (with the blank screen) and follow the process to shutdown as 
if I had logged in (without being able to see anything), the computer 
actually shuts down. That indicates that the boot process completes, but 
I have nothing on screen except for the underscore.

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