Public bug reported: Flicker is occurring in my screen randomly. I've tried to disable the nvidia card and use the internal intel graphic card but issue is present in both cases. Noticed everytime this occur, dmesg logs show: [ 299.696671] ACPI Warning: _BQC returned an invalid level (20170831/video-640) [ 1123.616996] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [ 1123.617098] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 1123.617159] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
Please help address this bug. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7.1 ProcVersionSignature: Ubuntu 4.15.0-121.123-generic 4.15.18 Uname: Linux 4.15.0-121-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.9-0ubuntu7.17 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Mon Nov 9 12:49:50 2020 DistUpgraded: 2019-08-24 21:40:09,878 DEBUG icon theme changed, re-reading DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: bbswitch, 0.8, 4.15.0-117-generic, x86_64: installed bbswitch, 0.8, 4.15.0-121-generic, x86_64: installed nvidia, 390.138, 4.15.0-117-generic, x86_64: installed nvidia, 390.138, 4.15.0-121-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell 2nd Generation Core Processor Family Integrated Graphics Controller [1028:050e] NVIDIA Corporation GF108M [GeForce GT 540M] [10de:0df4] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Dell GF108M [GeForce GT 540M] [1028:050e] InstallationDate: Installed on 2019-01-16 (663 days ago) InstallationMedia: Ubuntu 16.04.5 LTS "Xenial Xerus" - Release amd64 (20180731) MachineType: Dell Inc. Dell System XPS L502X ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-121-generic root=UUID=9abc6245-6761-49d4-9926-ab9f9d169abc ro quiet splash vt.handoff=1 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: Upgraded to bionic on 2019-08-25 (442 days ago) dmi.bios.date: 10/20/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.name: 0MY6GN dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA07:bd10/20/2011:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0MY6GN:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.family: HuronRiver System dmi.product.name: Dell System XPS L502X dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1 version.libdrm2: libdrm2 2.4.101-2~18.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~18.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.8-0ubuntu1~18.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic false-gpu-hang freeze ubuntu -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1903551 Title: Xorg freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1903551/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp