Reposting the stuff I posted in compatibility list
1)Version Of Ubuntu - Ubuntu 12.04 - Precise Pangolin - 64 Bit
2)Laptop Maker - Lenovo
3)Laptop Model - Lenovo Z570.
Everything works and works good
Suspend/Resume works (This is the ONLY Linux flavour so far on which this has worked), Changing brightness through laptop keys works, Fn+F2 works (screen off/on), my pppoe connectivity works.
Best part is, this is the only version and flavour of Linux on which my battery works for 3.5 hours (and still counting...). That too while I am downloading cinammon, installing it, browsing the net, downloading updates, installing themes etc.
Best version of Linux I've used till date.
There are some laptop heating issues, but the temperature howers between 37C when Idle and 51C when all the activities mentioned above are going on. So not like its crossing 60C or something like that.
I was really really bugged with Windows. It would randomly put messages stating my USB Ports are gone dead, give me blue screens etc etc...But one day, while I was backing up my data, it crashed, and somehow the backup too got messed up. That did it for me and I have been looking out for a better OS to move off to.
Tried a lot of Linux Flavours. All of them are great and amazing, but there wasn't a single distro that would have all the features...And thats when I got Ubuntu 12.04 and man does it rock !!
Thank you Ubuntu Developers, now I am finally able to completely move off Windows.