> But easier than that is to direct Anaconda (the Fedora Linux > installer) to use a lower resolution. That doesn't work as smoothly > as it should, either, but this procedure works: > > To fix this, the install system needs to run with the boot parameters > "nomodeset resolution=1024x768". To do this, at the start screen, use > the arrow keys to select "Install", then type Esc. This gives the > prompt "boot:". Give it the command "linux nomodeset > resolution=1024x768", then type Return. > > Since I am not installing X Windows, when I boot the resulting Linux > system, it comes up in text mode with a low resolution.
For ordinary operation, it looks like the initial graphic resoution is controlled by the set gfxpayload=[value] lines in /boot/grub2/grub.cfg. The default is "keep", which seems to leave the screen in whatever configuration the VGA card was at initial boot. To specify a particular size, you can replace "keep" with, say, "1024x768". More details are at https://www.gnu.org/software/grub/manual/html_node/gfxpayload.html Dale