Dell Optiplex 5080 unable to boot from CD/DVD

The reason its not booting has to do with the region code setting.

You can install puppy linux and run regioncode to set the drive to your region

There are eight region codes possible, currently six are used:
North America (USA and Canada)
Europe, Middle East, South Africa and Japan
Southeast Asia, Taiwan, Korea
Latin America, Australia, New Zealand
Former Soviet Union (Russia, Ukraine, etc.), rest of Africa, India
China

DVDs contain most often a region code flag indicating the geographical region where the DVD was published (enabling the film and software industry to control the distribution).

WOOF Puppy still runs clean and mean live from a CDR

It will boot fine every day from a CD but WILL NOT BOOT from a DVD that is region coded.

Puppy linux CD likely works fine

burn a copy on cdr and F12 boot from that.

Once your region is set if the dvd is legit and for your country it will boot windows dvd. dont forget to press enter when you see the press any key to boot from CD.

http://ftp.nluug.nl/ftp/pub/os/Linux/distr/puppylinux/puppy-fossa/fossapup64-9.5.iso

Fossapup64 Puppy 9.5 - released September 2020

This is the fourth official release of an Ubuntu based 64 bit Puppy

https://www.youtube.com/watch?v=qibxDA_Kxdk

BIOS (Basic Input/Output System) based computers have been around for a long time. Most people familiar with computers have been into the BIOS setup at some point to change a setting such as boot device order or the system time.

UEFI (Unified Extensible Firmware Interface) is a standard and is (however much a pain it is) necessary to help address the limitation of BIOS/MBR systems limit of support for hard disks above 2 TB. MBR can not work on large disks. It is fairly inexpensive these days to replace your current harddisk with a 4 TB or even 6 TB.

You must turn secure boot off for an os that doesnt have security certificate from microsoft to F12 boot.  Dells in general will not show the F12 boot menu when secure boot is on so you F2 into bios setup and turn it off.

Simply type the following command to install regionset:

$ sudo apt-get install regionset

then run by Typing the command as follows:

# regionset /dev/dvd

regionset version 0.1 -- 
reads/sets region code on DVD drives
Current Region Code settings:
RPC Phase: II
type: SET
vendor resets available: 4
user controlled changes resets available: 4
drive plays discs from region(s): 5, 
mask=0xEF

Would you like to change the region setting 
of your drive? [y/n]:

My solution does apply you have to set region on DVD before it will boot. Region coding is set from windows or linux. CD booting doesnt have region code or encryption.

Any os other than Windows 10 64 bit or Ubuntu 18.04 etc will require secure boot OFF in bios for F12 booting.

Only 64 bit os is supported and it must be GPT UEFI not MBR Legacy. This is why I recommend making Puppy Linux CD.

1. Press Windows Key + R Key.

2. Type “devmgmt.msc” without the quotes and hit on Enter Key.

3. Expand DVD/CD-ROM drives, right-click the DVD drive for which you want to change region settings and then click Properties.

4. On the DVD Region tab.

5. Under list of regions, scroll down the mouse to search for your region from the list and click on it.

6. Then region you want will be listed below, then click on Ok button.

5080 works with ubuntu.

https://certification.ubuntu.com/hardware/201912-27651

There is support for it but support is not free.

Dell does not support Linux unless the system came with it from dell.

Hi all,

I got the CD finally identified by using openSUSE and the instructions there https://software.opensuse.org/distributions/leap?locale=en 

What actually helped and made the difference is the tool ImgBurn http://www.imgburn.com/ 

Thank you for your replies.