For dmesg without nomodeset, please find attachment in comment #11 lightdm.log without nomodeset attached.
** Attachment added: "lightdm.log" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1301839/+attachment/4074388/+files/lightdm.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1301839 Title: AMD Radeon HD 8670A/8670M/8690M[1002:6660] Low-graphic mode with Trusty dailylive To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1301839/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
