I'm running an T450s with 2 external DELL monitors, one 24" and a DELL 27", both are connected by Displayport.
After locking the desktop by windows+L key and returning after some time (minutes) the 27" DELL isn't working anymore and i have to reconfigure the whole display settings, the dmesg output bring up the following lines: … [19707.593875] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! [19707.594307] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! [19707.595068] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1488719 Title: dmesg shows "[drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!" Status in Linux: Fix Released Status in linux package in Ubuntu: Confirmed Bug description: On a recent intel NUC using i915 graphics, I get the following errors in dmesg: [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! There are two monitors connected to this box, one with mini- HDMI->HDMI, one with mini-DP->HDMI cable. Maybe related: https://bugs.freedesktop.org/show_bug.cgi?id=80896 ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-generic 3.19.0.26.25 ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4 Uname: Linux 3.19.0-26-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.3 Architecture: amd64 Date: Wed Aug 26 10:07:31 2015 InstallationDate: Installed on 2015-08-01 (24 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-26-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1488719/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp