1
I start up the machine and the DVD drive gets correctly listed
Detected ATA/ATAPI Devices ...
SATA port 3 <harddisk>
SATA port 4 <SSD>
SATA port 6 HL-DT-ST BDDVDRW
So I press F11 to get into the boot menu ... which doesn't list the drive.
(If you're wondering, yes, I've set up a dual boot with ubuntu and Windows 10 [updated from 8.1].)
Went into the setup menu and changed the boot order s.t. CD/DVD and USB CD/DVD were both first (in particular, in front of disk), which did perfectly nothing, the boot disk just gets ignored.
Disabled booting from floppy (because my PC doesn't have a floppy drive, plus I also read elsewhere that doing so might help ... which it doesn't.)
Other than that, I did not touch the settings. (Secure Boot support is disabled)
The dvd is bootable, I have confirmed as much with virtualbox.
So how do I get the option to actually boot from it?
(note: booting from USB stick works, couldn't have installed ubuntu, otherwise)
User1291
Posted 2016-11-23T18:12:38.807
Reputation: 366
from the screenshot it appears that you have UEFI. Unlike BIOS UEFI support booting from media with correct keys (aka secure boot). Is that enabled in your case? What CD are you trying to boot from? – Hennes – 2016-11-23T18:16:31.117
@Hennes Trying to test the new Tails3 alpha build. And no, Secure Boot support is disabled (and its mode "standard", but I doubt that matters when it is disabled). – User1291 – 2016-11-23T18:24:49.397
Your UEFI should have a "Legacy Boot" or something to that effect. Some OS's require the UEFI to present this to behave and be bootable. – Linef4ult – 2016-11-23T21:02:05.070
1@Linef4ult Perfect, disable windows 8 features and it will change "UEFI" to "UEFI + Legacy" and the dvd will show up. Thanks a lot. Want to make an answer out of it? – User1291 – 2016-11-23T21:20:31.453