let's keep using the nouveau driver as a reference.
Please install the "linux-generic-lts-raring" package, boot into the new kernel and try to reproduce the problem, then attach the output of dmesg and your /var/log/Xorg.0.log and /var/log/Xorg.0.log.old
let's keep using the nouveau driver as a reference.
Please install the "linux- generic- lts-raring" package, boot into the new kernel and try to reproduce the problem, then attach the output of dmesg and your /var/log/Xorg.0.log and /var/log/ Xorg.0. log.old