I installed CoreOS 4 on a new machine recently, and I liked it and want to now install it on my old Mac Pro “trash can”.
I can boot from the USB, but after all of the messages scroll by and it’s ready to clear the screen and give me the prompt, the screen just goes blank.
Is this a known issue on these machines, and is there a workaround? I had no such trouble on an HP Z4 G4.
Some systems end up with a blank screen using the F38 Live Workstation installer. Workaround is to install F36 or F37 and upgrade. You should be able to find a Bugzilla report for this.
I think linux now uses kernel modesetting (KMS) graphics for the text console early in the boot sequence. On my iMac, (with rhgb quiet removed from the kernel command line),
I see a bit of low res console output before the KMS console starts at a higher resolution.
With Kernel Mode Setting (KMS), the kernel is now able to set the mode of the video card. This makes fancy graphics during bootup, virtual console and X fast switching possible, among other things.
The Arch Linux document has pointers to additional details.
Thanks. Yes I do see some text output first, then it goes blank just when a normal boot would issue a login prompt. On the HP machine, at that point it clears the screen and then gives more text mode output in what appears to be the same video mode, but it might not be.
I’ll try the disabling KMS on the command line. No idea why that wouldn’t be disabled on a Live USB installer image that boots to a command line already, though. (Aren’t most people who are installing FCOS on bare metal intending to use it headless anyway?)