I had to submit this report on a different machine because the machine affected is not currently connected to the net.
The current (saucy, as of July 13, 2013) Lubuntu LiveCD boots and gives the user the *impression* that it works on UEFI machines. Then, when the user is satisfied with the experience and decides to install, it fails with a cryptic message that "the 'grub-efi' package failed to install into /target/".
The user in question (the writer of this report), makes an attempt to approach the problem as rationally as he can, examining how the SSD is partitioned, trying to find out if there is some non-standard hardware (SONY!) or software (Microsoft) deviation from the standard UEFI specifications, does a whole lot of things, only to find out, after a lot of wasted hours, that all he needed to solve the bug was a diff between
http://cdimage.ubuntu.com/lubuntu/daily-live/current/saucy-desktop-amd64.list
http://cdimage.ubuntu.com/lubuntu/daily/current/saucy-alternate-amd64.list
On July 13, 2013 grub-efi was listed in the alternate CD but not in the desktop CD.
Unfortunately, because the hardware is very new (Haswell ULV based SONY Vaio Pro 13), the network ( Intel 802.11ac 7260 wireless card) does not work, so the package can't be downloaded during install.
There is a whole breed of machines hitting the market with this kind of set up. I love Lubuntu. Why should I waste my machine's resources on fancier eye-candy (the ubuntu, gnome, and kubuntu live CDs all contain the grub-efi package)? All I need is lightweight productivity and Lubuntu is my desktop of choice on the lightest and most energy efficient hardware tht I can find.
At the moment, I can make it work in LEGACY mode, following https://spicious.com/sony-vaio-pro-11-with-ubuntu.html to patch the kernel), but it can work with UEFI mode as well, at least in Fedora: http://www.nicksplace.com.au/2013/07/01/sony-vaio-pro-13-vs-fedora-19/
The experience with the saucy desktop download of Lubuntu was dreadful. I hope this report will motivate you to add the necessary packages (which are in alternate, kubuntu-desktop, ubuntu-desktop) and make the Lubuntu install experience on the current generation of Haswell ULV a more rewarding one.
Thank you for reading.
Nice to see that somebody has picked this report up. In the meantime, newer version of the kernel shipped with saucy support the network card of the SONY Vaio Pro 13. I guess this has defused the issue for network connected machines. Also, I have been able to dual boot in UEFI.
What worked for me two months ago (in the meantime, things might have improved):
After installation, boot with a LiveCD and execute the following commands (assuming the EFI partition is /dev/sda1)
sudo su
mount /dev/sda1 /mnt
cd /mnt/EFI
cp -a ubuntu Boot
cd Boot
mv grubx64.efi bootx64.efi