After last (day 22 of this month) package upgrade of ubuntu 14.04, my PC got slow (compiz using too much cpu), soundless and i can't adjust brightness anymore. When i reinstall factory system (ubuntu 14.04) it becomes normal. However, once i upgrade packages, the same problem occur. PC configurations:
There is any way to fix this without having to upgrade the ubuntu version, and keep packages updated as possible?
Thanks.