I own an Acer Aspire 5720.
The laptop had an old version of Ubuntu. Due to networking issues, I had to restore the PC and install the newest version, 21.10.
I don't have CDs/DVDs burners on my PCs, so I burned the .iso in a USB drive, FAT32.
I proceeded with the installation of the OS on the laptop through the USB and everything worked as intended. In fact, I could try out the OS on the USB while installing it.
By starting the OS immediately after the installation, the screen stopped with the following message: "no bootable device" and "grub_efi_secure_boot not found" on GRUB. By using the BIOS, I made sure that the boot priorities were right. But it doesn't seem to be the actual problem.
According to some resources, it seems to be a matter of compatibility with new functionality from the newest OSs called Secure Boot. You need to set up appropriately the Secure Boot on UEFI and select the .iso Ubuntu file in your USB drive as trusted. However, the BIOS in my PC does not offer any options about Secure Boot, probably because both PC and BIOS are outdated. Meaning I can't approach tutorials that seem to work only for PCs with Secure Boot, like this one.
Considering what I said above, these are my questions (mainly one):
- Is it possible to install the latest Ubuntu on my old PC which does not support Secure Boot and UEFI with the current USB drive?
- Is there a way to activate Secure Boot and UEFI options in another way?
- If the issue comes from the USB drive, is burning the OS on liveDVD/CD a possible fix?
Thank you for your reading! Keep in mind that most of the things I said come from what I found elsewhere. I'm not as cultured as it seems from the question.