The errors logged: kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun
so be sure to only use the intel driver from the (x)ubuntu archive. Purge xserver-xorg-video-intel (sudo apt-get purge ....) then reinstall it. Of course if some non trusted packages has also been installed, then goto ubuntu archive. If the problem still persist after the above tweaks done, then check with a previous kernel. And the irq bios settings needs indeed to be checked. ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- 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/1625350 Title: High CPU usage of /usr/lib/xorg/Xorg To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1625350/+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