Just installed Kubuntu 16.04, fully updated as of 4/22/16 Noticed these two errors in KSystemLog: 4/22/16 12:08 PM jerry-Aspire-7739 kernel [13263.413901] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun 4/22/16 12:08 PM jerry-Aspire-7739 kernel [13263.415521] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
lspci jerry@jerry-Aspire-7739:~$ lspci 00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02) 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) 00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) 00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05) 00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 05) 00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation HM55 Chipset LPC Interface Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) 00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05) 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01) 03:00.0 Ethernet controller: Qualcomm Atheros AR8152 v2.0 Fast Ethernet (rev c1) 3f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02) 3f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02) 3f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02) 3f:02.1 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor QPI Physical 0 (rev 02) 3f:02.2 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved (rev 02) 3f:02.3 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved (rev 02) Partial lshw report: jerry@jerry-Aspire-7739:~$ lshw WARNING: you should run this program as super-user. jerry-aspire-7739 description: Computer width: 64 bits capabilities: vsyscall32 *-core description: Motherboard physical id: 0 *-memory description: System memory physical id: 0 size: 7654MiB *-cpu product: Intel(R) Core(TM) i3 CPU M 370 @ 2.40GHz vendor: Intel Corp. physical id: 1 bus info: cpu@0 size: 1333MHz capacity: 2399MHz width: 64 bits capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 popcnt lahf_lm tpr_shadow vnmi flexpriority ept vpid dtherm arat cpufreq -- 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/1509355 Title: xorg crashes because of intel gpu driver Status in linux package in Ubuntu: Expired Bug description: Suddenly and without any warning the screen became blank and lightdm rebooted. I have found these interesting lines in dmesg: [14137.598202] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [14137.598222] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [14137.608538] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B [14137.608552] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun [14245.095875] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A (start=601133 end=601134) [14697.328451] hrtimer: interrupt took 381228 ns [14744.724686] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe B (start=36973 end=36974) [17123.949459] usb 1-2: USB disconnect, device number 9 [17794.824728] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable link training [17794.830525] [drm:intel_dp_complete_link_train [i915]] *ERROR* failed to start channel equalization This *may* be related to screen switching (undocking/docking of the notebook with an external monitor attached), but I am not sure at all. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3 Uname: Linux 4.2.0-16-generic x86_64 NonfreeKernelModules: wl .tmp.unity.support.test.0: ApportVersion: 2.19.1-0ubuntu3 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Fri Oct 23 15:03:40 2015 DistUpgraded: 2015-10-23 09:58:52,432 DEBUG enabling apt cron job DistroCodename: wily DistroVariant: ubuntu DkmsStatus: bcmwl, 6.30.223.248+bdcom, 3.19.0-31-generic, x86_64: installed bcmwl, 6.30.223.248+bdcom, 4.2.0-16-generic, x86_64: installed virtualbox, 5.0.4, 3.19.0-31-generic, x86_64: installed virtualbox, 5.0.4, 4.2.0-16-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:1993] InstallationDate: Installed on 2015-04-02 (203 days ago) InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64 (20141022.2) MachineType: Hewlett-Packard HP ProBook 640 G1 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-16-generic root=/dev/mapper/vg--root-lv--root ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to wily on 2015-10-23 (0 days ago) dmi.bios.date: 09/03/2014 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: L77 Ver. 01.21 dmi.board.name: 1993 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 16.39 dmi.chassis.asset.tag: 5CG4454VRQ dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvrL77Ver.01.21:bd09/03/2014:svnHewlett-Packard:pnHPProBook640G1:pvrA3009DD10303:rvnHewlett-Packard:rn1993:rvrKBCVersion16.39:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP ProBook 640 G1 dmi.product.version: A3009DD10303 dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.64-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4 version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3 xserver.bootTime: Fri Oct 23 14:55:44 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 4669 vendor AUO xserver.version: 2:1.17.2-1ubuntu9 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1509355/+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