[SOLVED] Black Screen after refind ... how to diagnose?

dspahn · Guru Joined: 22 Jun 2006 Posts: 392

I have refind installed. Boot is /dev/sda1, swap is /dev/sda2, root is /dev/sda3. When I boot, Refind identifies the kernel file, then it echoes the string I Have that just says root=/dev/sda3 to the screen. A few moments later the screen goes black and it stops booting. How do I determine the cause? I have the same kernel command line baked into the kernel that refind is using and still no boot. I have set up another computer that is a different model and it boots to UEFI no problem. I have all the UEFI kernel items set and can see the efivars mounted. /boot is vfat, per the handbook, and / is ext4.
Ideas on how to solve this?
Thanks!
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Since there is no admin beer, I stick to root beer.

Jaglover · Posted: Wed Dec 08, 2021 9:26 pm Post subject:

Screen goes black, this you can see. But how do you know it stops booting?
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logrusx · Veteran Joined: 22 Feb 2018 Posts: 1584

See if NumLock responds. Try to switch to another virtual terminal with CTRL+ALT+F{2,3,4...}. If your system is configured to boot into a desktop manager, press ALT+SysRQ+R to switch the keyboard to raw mode. Test NumLock again to see if it responds. Try to switch to another virtual terminal again. Test if CTRL+ALT+DEL reboots the system. If it does, you have a problem with your framebuffer device and graphic card drivers. If it doesn't, you may have a problem with your keyboard driver as well.

Regards,
Georgi

dspahn · Guru Joined: 22 Jun 2006 Posts: 392

It was the kernel after all- I switched to GRuB and had the same problem. Added some simple framebuffer devices and booted. Thanks for the help!
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Since there is no admin beer, I stick to root beer.