faginbagin

Calm down bro. Dakanji is only trying to help and your attitude is not helping you.

I wrote a little program that works like grub-set-default nine years ago and posted the source to the refind forum. I haven't used refind for a long time, although I still follow the forum. Which means I haven't tested it it in years. But maybe it will solve your problem? Here's my post: https://sourceforge.net/p/refind/discussion/general/thread/37046692/

Just wanted to add a "Me Too". First that 2.8.75 caused flickering from Windows 11 to Lubuntu desktop 22.04 running x11vnc both with and without a putty tunnel in-between (no VM) and that tightvnc-2.8.76-gpl-setup-64bit.msi fixed it, One Lubuntu machine has Intel UHD Graphics 630. The other has AMD/ATI Radeon HD 4200. I had also noticed the flickering on another Lubuntu machine with an old nVidia GT220 and the nouveau driver a few days ago but haven't tested with the bug fix. I assume it will wo...

I did some more research on this and I think I can offer some more help. First, it sounds like you might not have downloaded the right file. There are more than one to choose from for a given release of refind. They are described here: https://www.rodsbooks.com/refind/getting.html You want the link for "A USB flash drive image file", which is: http://sourceforge.net/projects/refind/files/0.13.3.1/refind-flashdrive-0.13.3.1.zip/download When you download this zip file, it should be named: refind-flashdrive-0.13.3.1.zip...

A couple of thoughts: If your iMac is newish, it might be what the first link I sent: https://support.apple.com/en-us/HT204012 refers to as a Mac with Apple silicon. In that case, you want to follow the "On a Mac with Apple silicon" directions. I.e. hold down (don't release) the power button when you turn it on. Since you see "GNU GRUB version 2.04", I suspect your great-grandkids somehow managed to install the GRUB bootloader on your iMac's drive. This suggests to me that you are going to need to...

First, I'm not a mac user, but I've tinkered with it, and since it's been a few hours since you posted and no one else has responded, I'll try to help. I'm not sure what "key presses" you've tried, but if you've tried Command + R while restarting the iMac and that hasn't worked, then creating a bootable USB stick with rEFInd probably won't help. That's because Command + R is the mechanism you need to boot that USB stick. Command + R should also allow you to boot from your backup, too. So, if you...

Well, if the computer works with 4.4, then the hardware didn't break. And, if you've got the time and the means to track down the root cause, you can get it fixed. I recently discovered two regressions in the kernel that affected a 32 bit laptop built in 2005 and worked with kernel developers to get them fixed.

You could try one or more of the ubuntu mainline kernels found here: https://kernel.ubuntu.com/~kernel-ppa/mainline/ If I were you, I would try the 5.2.11 kernel: https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.2.11/ If you're lucky, there's a regression in the 5.0 series that's fixed in the 5.2 series. In that case, try installing ubuntu 19.10 in a few weeks time. If you're not lucky, you could try a kernel closer to what came with the first releases of 18.04, namely the 4.15 series: https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.18/...