Alexander List, thank you for reporting this and helping make Ubuntu better. As per https://downloadcenter.intel.com/search?keyword=NUC5i5RY an update to your computer's buggy and outdated BIOS is available (0350). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?
If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible, and the information above is provided, then please mark this report Status Confirmed. Otherwise, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-0350 ** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: High => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1465506 Title: plane A assertion failure (expected on, current off) on Intel NUC 5i5RYH Status in xf86-video-intel: Unknown Status in linux package in Ubuntu: Incomplete Bug description: Getting assertion failures: [ 9925.287975] WARNING: CPU: 3 PID: 7538 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:1256 assert_plane.constprop.87+0x7b/0x90 [i 915]() [ 9925.287976] plane A assertion failure (expected on, current off) Around the same time, WiFi connections drop. I cannot prove the two problems are related, but I don't have WiFi issues on other devices. alex@nuc1-hkg:~$ lsb_release -rd Description: Ubuntu 15.04 Release: 15.04 alex@nuc1-hkg:~$ apt-cache policy xserver-xorg-video-intel xserver-xorg-video-intel: Installed: 2:2.99.917-1~exp1ubuntu2.2 Candidate: 2:2.99.917-1~exp1ubuntu2.2 Version table: *** 2:2.99.917-1~exp1ubuntu2.2 0 500 http://tw.archive.ubuntu.com/ubuntu/ vivid-updates/main amd64 Packages 100 /var/lib/dpkg/status 2:2.99.917-1~exp1ubuntu2build1 0 500 http://tw.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages alex@nuc1-hkg:~$ apt-cache policy linux-image-generic linux-image-generic: Installed: 3.19.0.21.20 Candidate: 3.19.0.21.20 Version table: *** 3.19.0.21.20 0 500 http://tw.archive.ubuntu.com/ubuntu/ vivid-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ vivid-security/main amd64 Packages 100 /var/lib/dpkg/status 3.19.0.15.14 0 500 http://tw.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2 ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8 Uname: Linux 3.19.0-21-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' Date: Tue Jun 16 14:33:41 2015 DistUpgraded: Fresh install DistroCodename: vivid DistroVariant: ubuntu ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation Broadwell-U Integrated Graphics [8086:1626] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Intel Corporation Device [8086:2057] InstallationDate: Installed on 2015-06-16 (0 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-21-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-intel UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/29/2015 dmi.bios.vendor: Intel Corporation dmi.bios.version: RYBDWi35.86A.0249.2015.0529.1640 dmi.board.name: NUC5i5RYB dmi.board.vendor: Intel Corporation dmi.board.version: H40999-503 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorporation:bvrRYBDWi35.86A.0249.2015.0529.1640:bd05/29/2015:svn:pn:pvr:rvnIntelCorporation:rnNUC5i5RYB:rvrH40999-503:cvn:ct3:cvr: version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2 version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1 xserver.bootTime: Tue Jun 16 14:32:31 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 10103 vendor AOC xserver.version: 2:1.17.1-0ubuntu3 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1465506/+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