Thanks for the advice. Unfortunately I don't completely understand what you mean with the following:
> Of course if some non trusted packages has also been installed, then goto ubuntu archive. For the moment I have purged xserver-xorg-video-intel without reinstalling it (since I've seen that it is optional). I cannot yet verify with certainty whether this solves the issue because I haven't found a way to reproduce it in a deterministic way. That said, after uninstalling xserver-xorg-video-intel, my virtual terminals are visible again (which I hadn't mentioned in the original post because I hadn't thought that this issue might be related). I will keep this configuration until I either run into the original issue again or you advice me to install the package again. In case this was a misconfiguration on my side (don't know why the optional package was installed): Sorry for filing a bug report. Cheers -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1625350 Title: High CPU usage of /usr/lib/xorg/Xorg Status in xorg package in Ubuntu: Incomplete Bug description: My laptop is running Xubuntu 16.04 and recently (don't know when exactly) started showing very sluggish display and input behavior: - Typed input lags several characters behind. - Mouse input is slow (e.g. when drag and dropping elements) - /user/lib/xorg/Xorg uses high percantage of CPU ressources (oftentimes 100%) Any help is appreciated. Please let me know if you need any more information. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: XFCE Date: Mon Sep 19 21:57:52 2016 InstallationDate: Installed on 2016-02-07 (225 days ago) InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to xenial on 2016-08-03 (46 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1625350/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
