Last Sunday, after upgrading my old netbook (ASUS Eee PC 900) from Debian Wheezy to Jessie, I decided to try Debian Jessie Live on my laptop. Unfortunately, the provided image couldn’t boot in UEFI environment, so I had to switch booting mode from UEFI to legacy. After playing with the distro for a while (it had problems with my wireless card’s drivers), I changed the booting mode back to UEFI and rebooted. To my surprise, there wasn’t Slackware option in the boot menu anymore. It looks like changing the booting mode changes something in UEFI settings. Anyway, I needed my Slackware, so I booted my rescue USB with Parted Magic. It was a bit dated (version from June, 2014), maybe that’s why efibootmgr (v0.5.3) refused to work with my laptop’s UEFI firmware. At least I confirmed that my ELILO files were intact in EFI partition, so all I needed was efibootmgr to add an option to the boot menu. Somehow I didn’t think about booting into Windows 8.1, which I also have on my laptop, to add a boot option to UEFI, but if I did that it wouldn’t be so interesting, would it?
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