I just notice that when operating from tty I get the same message. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1551982
Title: uncleared pch fifo underrun on pch transcoder A Status in xorg package in Ubuntu: Confirmed Bug description: After upgrading from 14.04 to 16.04, the following appears in dmesg and for a short while on black ascii screen during login sequence: [ 2.214317] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 2.214339] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3 Uname: Linux 4.4.0-9-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 355.00.26 Sun Feb 14 16:11:36 PST 2016 GCC version: gcc version 5.3.1 20160225 (Ubuntu 5.3.1-10ubuntu2) ApportVersion: 2.20-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Tue Mar 1 16:55:32 2016 DistUpgraded: Fresh install DistroCodename: xenial DistroVariant: ubuntu DkmsStatus: bbswitch, 0.8, 4.4.0-8-generic, x86_64: installed bbswitch, 0.8, 4.4.0-9-generic, x86_64: installed nvidia-355, 355.00.26, 4.4.0-8-generic, x86_64: installed nvidia-355, 355.00.26, 4.4.0-9-generic, x86_64: installed GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] 3rd Gen Core processor Graphics Controller [1462:10b8] NVIDIA Corporation GK107M [GeForce GT 645M] [10de:0fd9] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] GK107M [GeForce GT 645M] [1462:10b8] InstallationDate: Installed on 2016-02-29 (1 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160228) MachineType: Micro-Star International Co., Ltd. CX61 0NC/CX61 0ND/CX61 0NF/CX61 0NE ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-9-generic root=UUID=7ffdb95a-c39d-4d4a-964a-eebefe28f75b ro quiet splash SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/10/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: E16GBIMS.406 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: MS-16GB dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: REV:1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: CX61 0NC/CX61 0ND/CX61 0NF/CX61 0NE dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE16GBIMS.406:bd10/10/2012:svnMicro-StarInternationalCo.,Ltd.:pnCX610NC/CX610ND/CX610NF/CX610NE:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-16GB:rvrREV1.0:cvnCX610NC/CX610ND/CX610NF/CX610NE:ct10:cvrN/A: dmi.product.name: CX61 0NC/CX61 0ND/CX61 0NF/CX61 0NE dmi.product.version: REV:1.0 dmi.sys.vendor: Micro-Star International Co., Ltd. version.compiz: compiz 1:0.9.12.2+16.04.20160209-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu1 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.17.3-2ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160218-1ubuntu2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1 xserver.bootTime: Tue Mar 1 16:33:17 2016 xserver.configfile: /etc/X11/xorg.conf xserver.errors: systemd-logind: failed to get session: PID 931 does not belong to any known session xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.17.3-2ubuntu4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1551982/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
