I upgraded my notebook to Linux kernel 2.6.18 about a month ago, shortly it was released. One thing that is greatly improved is the stability of suspending to disk. I use Suspend 2 and with various patchlevels of 2.6.17 it would sometimes not suspend properly, necessitating a reboot. Things seem a lot better after the upgrade – I haven’t yet had a suspend fail, touch wood.

Sadly, my laptop still generates spurious ACPI overheating events, which cause an unwanted shutdown. That’s something I’ll probably have to fix with a new DSDT or by patching the kernel myself to ignore nonsensical temperatutes (783 degrees!).