My Vostro 1400 (Core 2 Duo) has kernel bugs on sleep-wake related to the Ricoh xD media reader (remember those? I don't either), and my Inspiron 15R SE (Ivy Bridge) randomly disconnects from all external USB devices until I use the internal keyboard to remove and reload the xhci_hcd kernel module. And my Ideapad Flex 4 models have a bug where you can press Page Up, release Fn, and release Up, which on Windows stops sending Page Up events but on Linux results in a stuck Page Up key (technically a laptop bug but affects Linux far worse). So older laptops are by no means trouble-free either.