I have resolved , replace Grub settings in the /etc/default/grub add "nomodeset" in GRUB_CMDLINE_LINUX_DEFAULT="quiet splash " like that GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset" then update-grub
ubuntu 12.04 32 kernel : 3.5.0-17-generic xserver-xorg-video-intel 2:2.19.0-0ubuntu1~xup1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/814895 Title: [snb-m-gt2] Booting with external monitor fails with *ERROR* Couldn't find PLL settings for mode! To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/814895/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
