Siddarth Saxena, thank you for reporting this and helping make Ubuntu better.
As per http://support.lenovo.com/us/en/products/laptops-and- netbooks/lenovo-b-series-laptops/lenovo-b490-notebook an update to your computer's buggy and outdated BIOS is available (H9ET92WW). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it address the issue? If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. Also, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible, and the information above is provided, then please mark this report Status Confirmed. Otherwise, please mark this as Invalid. Thank you for your understanding. ** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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/1512348 Title: Lenovo - Trace effect Status in linux package in Ubuntu: Incomplete Bug description: Found this message in dmesg: [18760.486422] Hardware name: LENOVO 20207/20207 , BIOS H1ET75WW(1.18) 06/27/2013 [18760.486424] ffffffffc07dded8 ffff88011e243d28 ffffffff817c4e0f 0000000000000007 [18760.486426] ffff88011e243d78 ffff88011e243d68 ffffffff81076a8a ffff88011e243d88 [18760.486428] ffff8800c224c000 ffff8800c16f1000 0000000000000000 ffff8800c16f11a8 [18760.486430] Call Trace: [18760.486432] <IRQ> [<ffffffff817c4e0f>] dump_stack+0x45/0x57 [18760.486440] [<ffffffff81076a8a>] warn_slowpath_common+0x8a/0xc0 [18760.486442] [<ffffffff81076b06>] warn_slowpath_fmt+0x46/0x50 [18760.486459] [<ffffffffc0788cda>] intel_check_page_flip+0xda/0xf0 [i915] [18760.486472] [<ffffffffc07557f8>] ironlake_irq_handler+0x2e8/0xfd0 [i915] [18760.486474] [<ffffffff810dd750>] ? internal_add_timer+0x80/0x80 [18760.486477] [<ffffffff810e091c>] ? hrtimer_get_next_event+0xac/0xd0 [18760.486480] [<ffffffff810ceaa7>] handle_irq_event_percpu+0x77/0x1a0 [18760.486483] [<ffffffff810cec11>] handle_irq_event+0x41/0x70 [18760.486485] [<ffffffff810d1c7e>] handle_edge_irq+0x6e/0x120 [18760.486488] [<ffffffff81017762>] handle_irq+0x22/0x40 [18760.486491] [<ffffffff817ceedf>] do_IRQ+0x4f/0xf0 [18760.486493] [<ffffffff817ccced>] common_interrupt+0x6d/0x6d [18760.486494] <EOI> [<ffffffff81666505>] ? cpuidle_enter_state+0x65/0x160 [18760.486499] [<ffffffff816664f1>] ? cpuidle_enter_state+0x51/0x160 [18760.486501] [<ffffffff816666e7>] cpuidle_enter+0x17/0x20 [18760.486503] [<ffffffff810b7d71>] cpu_startup_entry+0x311/0x3b0 [18760.486507] [<ffffffff81049017>] start_secondary+0x197/0x1c0 [18760.486509] ---[ end trace 0a3cc2023da78889 ]--- ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-31.36-generic 3.19.8-ckt7 Uname: Linux 3.19.0-31-generic x86_64 NonfreeKernelModules: wl .tmp.unity.support.test.0: ApportVersion: 2.17.2-0ubuntu1.7 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 Date: Mon Nov 2 18:06:55 2015 DistUpgraded: Fresh install DistroCodename: vivid DistroVariant: ubuntu DkmsStatus: bcmwl, 6.30.223.248+bdcom, 3.19.0-15-generic, x86_64: installed bcmwl, 6.30.223.248+bdcom, 3.19.0-30-generic, x86_64: installed bcmwl, 6.30.223.248+bdcom, 3.19.0-31-generic, x86_64: installed vboxhost, 5.0.6, 3.19.0-30-generic, x86_64: installed vboxhost, 5.0.6, 3.19.0-31-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:5002] InstallationDate: Installed on 2015-10-07 (26 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: LENOVO 20207 ProcEnviron: LANGUAGE=en_IN:en TERM=xterm PATH=(custom, no user) LANG=en_IN SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-31-generic root=UUID=3af97ba8-67d0-4b9b-9b43-0c9d8a2138f5 ro quiet splash vt.handoff=7 SourcePackage: xorg UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/27/2013 dmi.bios.vendor: LENOVO dmi.bios.version: H1ET75WW(1.18) dmi.board.asset.tag: Not Available dmi.board.name: 20207 dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrH1ET75WW(1.18):bd06/27/2013:svnLENOVO:pn20207:pvrLenovoB490:rvnLENOVO:rn20207:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20207 dmi.product.version: Lenovo B490 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12.1+15.04.20150922-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2 version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2 version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1 xserver.bootTime: Mon Nov 2 10:15:24 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 1402 vendor IVO xserver.version: 2:1.17.1-0ubuntu3.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1512348/+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
