Public bug reported: I just took some updates to a number of graphic libraries on 16.04, and now I can't login to kubuntu. The symptom is that it takes my password on the greeter screen, but never updates the screen after that.
The messages include these possibly related kernel messages: kernel: [ 701.564034] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B kernel: [ 701.564054] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun I'm currently running kernel 4.4.0-36. Here are my most recent updates. The problem started after I rebooted. Of course that was the next time I logged in too... Start-Date: 2016-09-07 08:46:04 Commandline: /usr/bin/unattended-upgrade Remove: libcdaudio1:amd64 (0.99.12p2-14), linux-image-extra-4.2.0-36-generic:amd64 (4.2.0-36.42), linux-image-extra-4.4.0-22-generic:amd64 (4.4.0-22.40), gtk2-engines-murrine:amd64 (0.98.2-0ubuntu2.1), linux-image-extra-4.4.0-24-generic:amd64 (4.4.0-24.43), libslv2-9:amd64 (0.6.6+dfsg1-3build1), linux-image-extra-4.4.0-28-generic:amd64 (4.4.0-28.47), linux-image-extra-4.4.0-31-generic:amd64 (4.4.0-31.50), libfaac0:amd64 (1.28+cvs20151130-1) End-Date: 2016-09-07 08:48:13 Start-Date: 2016-09-07 16:42:27 Install: libgnome-keyring-common:amd64 (3.12.0-1build1, automatic), libgnome-keyring0:amd64 (3.12.0-1build1, automatic) Upgrade: libgles2-mesa:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libgles1-mesa:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libglapi-mesa:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libglapi-mesa:i386 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), p11-kit:amd64 (0.23.2-3, 0.23.2-5~ubuntu16.04.1), libxatracker2:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libegl1-mesa-drivers:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libegl1-mesa:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libegl1-mesa:i386 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), p11-kit-modules:amd64 (0.23.2-3, 0.23.2-5~ubuntu16.04.1), libgbm1:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libgbm1:i386 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), cups-filters:amd64 (1.8.3-2ubuntu3, 1.8.3-2ubuntu3.1), chromium-browser:amd64 (51.0.2704.79-0ubuntu0.16.04.1.1242, 52.0.2743.116-0ubuntu0.16.04.1.1250), libcupsfilters1:amd64 (1.8.3-2ubuntu3, 1.8.3-2ubuntu3.1), chromium-codecs-ffmpeg-extra:amd64 (51.0.2704.79-0ubuntu0.16.04.1.1242, 52.0.274 3.116-0ubuntu0.16.04.1.1250), libwayland-egl1-mesa:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libfontembed1:amd64 (1.8.3-2ubuntu3, 1.8.3-2ubuntu3.1), libgl1-mesa-dri:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libgl1-mesa-dri:i386 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), cups-filters-core-drivers:amd64 (1.8.3-2ubuntu3, 1.8.3-2ubuntu3.1), libgl1-mesa-glx:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libgl1-mesa-glx:i386 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), libp11-kit0:amd64 (0.23.2-3, 0.23.2-5~ubuntu16.04.1), libp11-kit0:i386 (0.23.2-3, 0.23.2-5~ubuntu16.04.1), mesa-vdpau-drivers:amd64 (11.2.0-1ubuntu2.1, 11.2.0-1ubuntu2.2), chromium-browser-l10n:amd64 (51.0.2704.79-0ubuntu0.16.04.1.1242, 52.0.2743.116-0ubuntu0.16.04.1.1250), ubuntu-mono:amd64 (14.04+16.04.20160621-0ubuntu1, 14.04+16.04.20160804-0ubuntu1), cups-browsed:amd64 (1.8.3-2ubuntu3, 1.8.3-2ubuntu3.1) End-Date: 2016-09-07 16:44:34 Start-Date: 2016-09-12 14:31:39 Commandline: /usr/sbin/synaptic Requested-By: alanr (1000) Upgrade: snapd:amd64 (2.13, 2.14.2~16.04), libappstream-glib8:amd64 (0.5.13-1ubuntu2, 0.5.13-1ubuntu3), neo4j:amd64 (3.0.4, 3.0.5), accountsservice:amd64 (0.6.40-2ubuntu11.1, 0.6.40-2ubuntu11.2), libaccountsservice0:amd64 (0.6.40-2ubuntu11.1, 0.6.40-2ubuntu11.2) End-Date: 2016-09-12 14:32:17 It was after rebooting after updates that this occurred. My workaround is "rm -fr ~/.kde" - and that allows me to log in. I'm crippled, but at least I can log in... If I try to log in again without doing this, the problem recurs. This happens even if I just log in and log back out, and try to log in again. However, I may just found a better workaround - press ALT-CTRL-F1 then ALT-CTRL-F7, and then the next chunk of the login sequence occurs. This makes it consistent with an issue reported in AskUbuntu http://askubuntu.com/questions/765364/kubuntu-16-04-sddm-login-screen- hangs And it's possibly related to bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779 - because of the CPU underrun being apparently related to graphics. In fact, each time I do this, I get a little further in the login sequence. It appears that the trigger for this bug is likely the prompts to provide passwords for my various ssh private keys (I have four). This also includes prompts from the KDE wallet manager for me to use the KDE wallet - and I don't use that feature. 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 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' Date: Thu Sep 15 07:53:07 2016 DistUpgraded: 2016-05-25 14:07:14,644 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: xenial DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [1043:8534] InstallationDate: Installed on 2014-07-12 (795 days ago) InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1) MachineType: ASUS All Series ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic root=UUID=1b9b0c50-d4ac-471c-a09a-0ee1cad092e4 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to xenial on 2016-05-25 (112 days ago) dmi.bios.date: 01/16/2014 dmi.bios.vendor: ASUSTeK COMPUTER INC. (Licensed from AMI) dmi.bios.version: 1707 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P9D WS dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnASUSTeKCOMPUTERINC.(LicensedfromAMI):bvr1707:bd01/16/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP9DWS:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: All Series dmi.product.version: System Version dmi.sys.vendor: ASUS version.compiz: compiz N/A version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2 version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Thu Sep 15 07:51:50 2016 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 9393 vendor ACI xserver.version: 2:1.18.3-1ubuntu2.3 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug ubuntu xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
