On Saturday, 22 December 2018 2:04:46 AM AEDT Craig Sanders via luv-main wrote:
On Fri, Dec 21, 2018 at 04:32:20PM +1100, Russell Coker wrote:
Recently Grub has been changing to a high resolution mode. On some systems this is really slow, presumably due to having a crap BIOS. On kvm/qemu systems it doesn't work with -display curses.
How do I get grub to stick to 80x25 text?
On Debian, Ubuntu etc, edit /etc/default/grub and
1. un-comment the line:
GRUB_TERMINAL=console
Thanks for that, I did that, ran diff on /boot/grub/grub.cfg and found that the following 2 lines were the relevant ones: terminal_input console terminal_output console Knowing that I was able to Google how to do this in Nixos, which is to put the following in /etc/nixos/configuration.nix and run "nixos-rebuild switch". boot.loader.grub.extraConfig = "terminal_input console ; terminal_output console";
BTW, for kvm you might also want to enable a serial console. I usually enable two serial consoles per VM, one to log the VM's boot up to a text file on the host, the other for console access with 'virsh console' (this is also how console access is provided in a javascript web by openstack and similar virtualisation wrapper systems). Remember to actually configure both grub and a getty (via inittab or systemd) to use the serial console as well as adding the console "hardware" to the VM.
Currently I run my kvm VMs under screen and just use screen -r to get the console. Virsh has some benefits, but so far it hasn't seemed worth the pain. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/