I've been running Lubuntu on my daughter's ancient IBM Thinkpad R32 for as long as I can remember. The upgrade from 12.04 to 14.04 was anything but smooth. I wasn't offered a straight 12.04-14.04 upgrade and instead went through the steps (12.10, 13.04, 13.10 and finally 14.04) when I probably should have just reinstalled with 14.04.
Now there's another problem. Wireless networking doesn't work. I even checked with the Lubuntu 14.04 live CD. And two different USB Wi-Fi adapters.
The system sees the networks, but it won't join them. And none of the "help" I found online was very helpful.
I could go back to the long-unsupported Lubuntu 14.04. Since this laptop has a CD drive only, that limits the live images I can try because many have climbed over CD size.
Lubuntu has not. And as I say above, I have tried it.
Fedora LXDE is also still CD-sized. I'm trying to download a torrent now. I'm doing the same with the Debian 7.6 netinstall image, from which I can whip up an LXDE system. Unfortunately Debian is a bit crapshootish because the Debian Live images are, again, too large for a CD.
I'd rather not go with Fedora, as this is OLD hardware. Debian's extra speed really shows in this situation (namely a Pentium 4 with 768 MB RAM).
I'm fairly confident I can return the Thinkpad to wireless-running usefulness. But I remain disappointed with Lubuntu (and maybe all of Ubuntu) for whatever it's doing to this old laptop's ability to complete a Wi-Fi connection.