Hm, that's another report saying that plugging in a 2nd monitor and switching it on on snb machine magically fixes things ...
A few things: Can you upgrade your kernel to the latest drm-intel-fixes branch from Keith's git: https://git.kernel.org/?p=linux/kernel/git/keithp/linux.git;a=summary Also can you install intel-gpu-tools at least v1.1, hopefully ubuntu has it. Otherwise grab the latest git from: http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/ Then run tools/intel_reg_dumper for both a working configuration (i.e. 2 monitors switched on) and a non-working configuration and attach the output to the bug. Please also attach the xrandr output so we know exactly what output configuration the register dump is coming from. The noapic issue is likely unrelated to your gpu woes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/912992 Title: [snb-m-gt2+] Primary laptop display not working, external monitor works fine. To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/912992/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
