I updated my BIOS to the current version ~ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date JBET66WW (1.30 ) 09/13/2017
It didn't fix the [Firmware Bug] lines in the syslog though Also the actual bug still appears. There seem to be some lines in the log that I haven't seen before though Nov 3 12:37:05 xxx kernel: [ 8137.161988] [drm:pipe_config_err [i915]] *ERROR* mismatch in pixel_rate (expected 148500, found 296999) Nov 3 12:37:05 xxx kernel: [ 8137.162024] [drm:pipe_config_err [i915]] *ERROR* mismatch in shared_dpll (expected ffff9818ca8b46e0, found ffff9818ca8b47 78) Nov 3 12:37:05 xxx kernel: [ 8137.162051] [drm:pipe_config_err [i915]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 148500, found 296999 ) Nov 3 12:37:05 xxx kernel: [ 8137.162076] [drm:pipe_config_err [i915]] *ERROR* mismatch in port_clock (expected 270000, found 540000) Nov 3 12:37:05 xxx kernel: [ 8137.162078] pipe state doesn't match! Can you advise on how to narrow down the error to the actual state where it happens? Can it be achieved through changing settings in /etc/systemd/logind.conf? Because currently the only way to reproduce it is locking the screen while the computer is sitting in the docking station and come back after a longer period of time (e.g. 30 minutes) ** Bug watch added: Red Hat Bugzilla #1506339 https://bugzilla.redhat.com/show_bug.cgi?id=1506339 -- 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/1727662 Title: Crashes after unlock: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun Status in linux package in Ubuntu: Incomplete Bug description: After upgrading from Ubtuntu 17.04 to Ubuntu 17.10 this bug started appearing. When I lock my screen on my Lenovo T450s and the notebook sits in the dock (two external screens attached), one of the three things happen when I come back after some time and try to unlock (so it went to power save in-between): * Most of the time the computer was just shut down and I have to start it again * Sometimes the notebook screen flickers weirdly and one of the two other screens show pixel garbage * The notebook screen shows the lock screen but is completely frozen. Occasionally unlocking also works. The last thing I find in /var/log/syslog is [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun Using or not using the following kernel parameter didn't change anything: i915.enable_rc6=0 ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-16-lowlatency 4.13.0-16.19 ProcVersionSignature: Ubuntu 4.13.0-16.19-lowlatency 4.13.4 Uname: Linux 4.13.0-16-lowlatency x86_64 ApportVersion: 2.20.7-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: akops 3337 F.... pulseaudio /dev/snd/controlC0: akops 3337 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Thu Oct 26 10:44:11 2017 HibernationDevice: RESUME=/dev/mapper/system-swap_1 MachineType: LENOVO 20BWS2YL00 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-16-lowlatency root=/dev/mapper/system-root ro quiet splash i915.enable_rc6=0 crashkernel=384M-:128M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-16-lowlatency N/A linux-backports-modules-4.13.0-16-lowlatency N/A linux-firmware 1.169 SourcePackage: linux UpgradeStatus: Upgraded to artful on 2017-10-20 (5 days ago) dmi.bios.date: 07/08/2015 dmi.bios.vendor: LENOVO dmi.bios.version: JBET51WW (1.16 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BWS2YL00 dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET51WW(1.16):bd07/08/2015:svnLENOVO:pn20BWS2YL00:pvrThinkPadT450s:rvnLENOVO:rn20BWS2YL00:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T450s dmi.product.name: 20BWS2YL00 dmi.product.version: ThinkPad T450s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1727662/+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
