I'm trying to boot a live distro on a VAIO YB35AL ultrabook. It doesn't have an optical drive, so I'm using a USB flash drive, and deploying the Linux ISOs to it using either unetbootin or Universal USB Installer.
With unetbootin, I get presented with a menu listing several boot options depending on the distribution I'm trying to boot, with a ten second countdown timer until it boots the Default entry. However, if press Enter to skip the countdown, or if I press an arrow key to choose another option, the laptop freezes instantly. If I let the timer expire, it starts booting, but freezes right after loading ubninit or displaying the SYSLINUX info depending on the distro (basically after loading initrd, I think). If I leave the laptop running after it freezes, it starts to overheat, probably due to high CPU load.
With Universal USB Installer, it simply freezes on boot, without the menu.
This behavior occurs regardless of which distribution I'm trying to boot. I've tried Knoppix 7.0.4, Fedora 18, Backtrack 5r3 and GParted Live (all of them LiveCD ISOs).
To eliminate possible causes, I scanned the USB drive for errors under Windows 8 and it came out clean. It may be worth mentioning that the laptop uses UEFI rather than BIOS and I'm not sure if all the distros I'm trying support UEFI. However, Fedora certainly does, and it's not working.
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