thanks for the lanunchpad guide. I tested kernel v3.12-rc6-saucy the external monitor using DP to VGA just works!
There are still error the messages: [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up but never the less it detects the screen and resolutions for xrandr and so on fro the DP to VGA adapter. However, the mainline builds gon't support my hardware well, trackpad and keyboard did not working. I also tried the saucy kernel from: https://launchpad.net/~canonical-kernel-team/+archive/ppa which still has the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1242013 Title: [Macbook Air 5,2] External monitor not working 12.04 - Display Port to VGA, xserver-xorg-lts-raring, Intel HD 4000 graphics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1242013/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
