This looks to be the same issue I am encountering with a Lenovo T520 running Fedora 16. The Xserver fails to start when there is an external monitor attached and the LCD screen is closed. The problem only occurs if the screen is closed at power on, presumably because the BIOS disables the LCD screen in those circumstances.
This is running Fedora16 with kernel 3.2.2-1.fc16.x86_64. A brief excerpt from dmesg shows a similar message: [ 2.741944] [drm:ironlake_crtc_mode_set] *ERROR* Couldn't find PLL settings for mode! [ 2.741953] [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC:3] -- 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
