Всем здрям, Патрик тут что то написал про nvidia и свободные дрова, не могу осмысленно перевести, подскажите:
I was on the fence with this upgrade, and in fact it sat in /testing for days with mesa-7.8.2 queued instead. But it seems the Intel driver really does need this version of Mesa or there are major problems with compositing (most of them leading to an X server crash).
If X crashes at start, try disabling compositing. Create a file named /etc/X11/xorg.conf.d/disable-composite.conf with this in it:
Section "Extensions"
Option "Composite" "Disable"
EndSection
The machine that had issues here was using an onboard nVidia 6150SE.
Using the nv, nouveau, or even the vesa driver, X crashed at start unless compositing was disabled. However, everything works perfectly when using the binary nVidia drivers, and odds are that most users with decent nVidia hardware are doing just that. So, that's the situation with nVidia and Mesa as observed here for now. Hopefully the defaults will work better soon, but meanwhile if you have nVidia hardware you may have to either disable compositing or obtain and use nVidia's binary drivers.