Once in a while, when updating my system after reboot I got a black screen. The problem seems to bee ATI drivers, but it's weird because even TTYs do not work.
For fix it I reboot on recovery mode, uninstall ATI drivers and then install them again and everything it's fine.
However, I'm trying to figure out which update is causing this. Is there any log where I can see which packages were updated the last time I updated the system?