todays update should also bring some more stability... although since using the patched kernel i have not a single issue with gfx..
xserver-xorg-video-intel (2:2.14.0-4ubuntu7.1) natty-proposed; urgency=low
* Add 119_disable_relaxed_fencing.patch: The relaxed fencing
optimization is suspected as the cause for various i915/945 gpu lockup
issues. This disables the optimization by default but adds an
xorg.conf parameter to let people experiment with it turned on.
(LP: #727594, #761143, #761632, #755693)
enforcing hdparm -B 254 /dev/sda on battery seems to help.. not a single lockup yesterday... from 9a.m to 24p.m (also no clicking..)
but this produces more heat on the harddrive and also shortens battery life as the harddrive will not go to sleep too often..
qmater: the issue for the small but constant lags is not windows or the windows partition itself, but the partition table which is not aligned to the physical sector boundries of the harddrive! (google: 4k advanced format - this can and will impact performance)
also starting many applications at once will be slow on a notebook harddrive or any harddrive (hello SSD ), but starting to copy something while trying to use firefox (search a huge history on my machine) will get firefox completely stuck for 2-5seconds, which is NOT normal... even on a single core atom netbook (which is so much slower) this never happend to me.
proof: since i repartitioned my whole harddrive.. those constant lags are completely gone! firefox never ever got stuck again, i tested that one very well and this issue is fixed for me - if you believe me or not . the only lags that remained for me was when running on battery (with harddrive clicking, which is due a ****** harddisk firmware -> WD_IntelliPark, wdidle3.exe not working on this harddrive to change the parameters of this) and after some time of heavy lag the system freezed. (when those heavy lags occur.. there is no way out.. the clicking wont stop no matter what you do with hdparm) my guess that those 2 things are related.
yesterday the notebook did not freeze or lag in any way, using the hdparm cmd(see above) when on battery...
will test more the next days.. if the problems are gone for me, i will exchange my harddrive as i want maximum battery performance