I updated my Raspberry-Fedora after a long time, before upgrading operations were very slow, after a long battle to uprade, now it works fine.I have never experienced a full block of my system but I have never run my Raspberry for more that five hours. Tonight I noticed that after login and after a while HDMI was shut downd and my tv-set became blank, I had to rechoose on my TV-set. Not clear about this issue, and I think not connected to updated kernel