On 16/2/18 6:24 am, Samuel Sieb wrote:
On 02/15/2018 04:15 AM, Anne Wilson wrote:
Samual and Steve, When I installed Fedora I got the screen where you
can turn UEFI off. Since I wanted to promote the DVD drive over hard
disk boot, I turned it off. I thought that was permanent. However,
now I can no longer get to that screen. I have managed several time
to interupt the boot, but I only have the choice of the existing
Fedora or Rescue. Something, which has to be Fedora related, since it
worked before, is stopping me booting from the DVD.
You can boot a DVD or USB drive in EFI mode. That's what I use on all
the new laptops that I install. What laptop do you have? Did you try
the suggestions from my last email? Once you get to the GRUB menu,
it's too late. If you watch carefully at the bottom or top of the
screen when you first turn the laptop on or reboot it, there is often
a very brief message saying which key to use to get the boot menu or
the BIOS setup. The key for setup is usually F10 or DEL.
As you said, Fedora shouldn't have changed the bios settings, but it
could be possible. I don't use a laptop, I use a desktop, and I would
have said that just plugging in a new graphics card would not have
changed the Bios settings, but when I did that, the first boot dropped
me into the bios setup automatically, where the power saving options
were different (which makes sense because the new graphics card has
different capabilities), but what didn't make sense was the timeout
value for display of the bios setup up message had been changed from 3
seconds to 0 (which I assume means never display it). I have now changed
that to 6 seconds because the original setting I made of 10 seconds was
too long. The keys for entering the bios setup on my motherboard are F2
or DEL, both can be used.
As Patrick said, if you aren't getting the screen that tells you what
keys will enter the bios setup, then as soon as you power on the laptop
hold down the DEL key until either you get the bios setup screen or the
grub menu. If you press the key at the right time and get to the grub
menu then the key you pressed was the wrong one, so I would try each of
the F1 through F12 keys until you find the one that does work, and then,
once you get into the bios setup I would change the timeout to make the
boot messages display for a bit longer so that you can see them and
respond to them in a timely manner if you need to. My motherboard
displays more than just the message about which key enters the bios
setup, it also tells me that F11 will display a device boot menu, which
in my case lists a lot more devices than can be select in the boot
priority order settings.
The screen you are mentioning I have never seen before, as I have never
done a fresh install of Fedora on a system with UEFI available. All
fresh installs I've done were on a system that didn't have UEFI at all,
or a system where I had disabled UEFI before I started the install. My
current motherboard doesn't have an option to disable UEFI if my belief
that on this motherboard I have to enable secure boot to enable UEFI is
incorrect.
regards,
Steve
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