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-X, which is subscribed to xorg in 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp