A long time ago, say in 2011, I must have figured this out already: to boot an Asus EeePC from a USB memory stick or an SDCard, you have to proceed as follows:
Ignore the BIOS boot order, the boot menu overrides it temporarily, unless you want to boot from a USB stick every time it boots, changing it in the BIOS is not necessary. Just try it, instead of hitting F2 to go into the BIOS, hit Esc.
Every EeePC I’ve ever come across has the boot menu when you hit Esc, it is the easiest way to boot from a USB stick or SD card.
Start hitting the Esc key as soon as the machine boots: simple, and it works like a charm! Thanks, elliott678 !
It has taken many hours installing and testing different Linux distributions, but I think I have found the successor to ElementaryOS and Ubuntu on my two old PC’s. Xubuntu turns out to be the most fluent Linux on the old 1MB PC, and that means it will be good enough for the EeePC as well, I guess. I will probably install different versions on both of them: 14.04 LTS is good enough for the PC. On the EeePC I tend to experiment a bit more, and since it has double the memory a more recent version should offer more opportunities to familiarise me with the specifics of the X-variant of Ubuntu… That could well be my first new year’s resolution: learning Xubuntu!