Same problem with 3.12.0-031200-generic from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-saucy/. I can attach dmesg and Xorg.0.log, they seem similar.
Same problem with 3.12.0- 031200- generic from http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v3.12-saucy/. I can attach dmesg and Xorg.0.log, they seem similar.