I have a Acer 1810TZ with SSD on which Ubuntu runs really fast, except that 13.04 introduced a bug that made my laptop freeze after every suspend and nearly every boot. Had to force a restart every time. No use.
I finally tracked it down to a 3.8 Kernel bug with certain Intel graphic chips, causes an irq storm from the i915, described here
I updated the Kernel to 3.9 following the instructions on Ubuntu Kernel/MainlineBuilds wiki. (Download 3.9 images and dpkg -i, restart)
Problem gone, laptop is running fine and is usable again. No more freezes.
Running 3.8 Kernel is no option on my hardware, downgrading to 12.04 LTS is not attractive either (it had it's problems).
Is it safe to keep using this 3.9 Kernel on 13.04? What's best advice here?