I guess it was to be expected. Let's see:
1. Ubuntu Jaunty, kernel 2.6.29. Check.
2. An ext4 single partition (or at least a /home in a ext4 partition). Check.
3. Intel driver, using UXA. Check.
Bonus:
4. In a laptop after several sleep/power-up cycles. Check
5. Trying to save power by powering wireless up/down as needed. Check!!
Result: the laptop froze just as I had checked my last 5 minutes of work into Mercurial and was pushing it to my home server. Hard lockup. No emergency SysReq + Sync possible!! Upon reboot it was as if I had never saved the last 5 minutes of work.
Very interesting. Not much was lost and I could not detect any corruption. So I am kind of optimistic. I'll keep using ext4 for the time being.
I am considering making a fsync button, though!! ^_^
