Still don't know what triggers the error. The last error log appeared just after I've unlocked the lightdm screen lock. I'm using two monitors: the one in my laptop and an external one (FullHD resolution) plugged through HDMI, nothing unusual.
Regards -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1579182 Title: [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1579182/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs