* Felix Miata <mrma...@stanis.net> [24-09/15=Sun 22:01 -0400]: > Will Mengarini composed on 2024-09-15 16:12 (UTC-0700): > > > I am trying to install Debian on a new prebuilt, but when I > > boot and press <F2>, the screen is garbled. Windows later > > figures it out, but by that time it's too late to tell the > > BIOS to boot from a USB stick on which I've installed netinst. > > > The mobo is a Gigabyte B450M DS3H WIFI (rev 1.5), manual at > > <https://www.gigabyte.com/Motherboard/B450M-DS3H-WIFI-rev-15#kf>. > > > I can see some letters on the garbled screen, but have not > > yet been able to figure out how to get to the boot order. > > > So, either of 2 things might help me: > > > (1) The complete key sequence at the BIOS screen (or its <F1> > > help screen) to tell the mobo to boot from the USB stick first. > > > (2) Some way to boot that stick or its > > contents directly from inside Windows. > > F12 should get you the Gigabyte BBS menu.
Something happens when I press <F12>, but I can't tell what, because I can't read the screen, because it is out of sync, using an unsupported resolution. > If you have no connected Windows disk, you should > either get the USB boot menu, or into BIOS setup. I doubt I am getting the USB boot menu because I would expect netinst to be readable on all monitors. I'm getting into BIOS setup but can't tell where to go from there because I can't read the monitor to tell what keys I should press. > If the GPU is on a discrete card and the motherboard provides an iGPU, > take the discrete card out until boot priorities are as you wish. There is no discrete GPU.
