Nishanth S, as per http://www.dell.com/support/home/us/en/19/product- support/product/inspiron-15-3551-laptop/drivers an update to your computer's buggy and outdated BIOS is available (A05). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?
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. As well, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible: 1) Please provide the output of the following terminal command (not perform an apport-collect): sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date 2) Please make a comment specifically advising on if there was an improvement or not. 3) Please mark this report Status New. If it's not reproducible, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-a05 ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1545394 Title: screen hangs offen after sometime Status in xorg package in Ubuntu: Incomplete Bug description: I don't know. the exact problem why ubuntu hangs the UI after sometime. But I did a partial upgrade from 14.04.1 to 14.04.3 through software updater. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 Uname: Linux 4.4.1 x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.19 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: Sun Feb 14 10:23:19 2016 DistUpgraded: Fresh install DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-trusty-amd64-20140620-0 DistroCodename: trusty DistroVariant: ubuntu DkmsStatus: oem-audio-hda-daily, 0.201410112046~ubuntu14.04.1, 3.13.0-38-generic, x86_64: installed oem-audio-hda-daily, 0.201410112046~ubuntu14.04.1, 3.13.0-77-generic, x86_64: installed GraphicsCard: Intel Corporation ValleyView Gen7 [8086:0f31] (rev 0e) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:06ab] InstallationDate: Installed on 2016-02-08 (5 days ago) InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25 MachineType: Dell Inc. Inspiron 3551 ProcEnviron: LANGUAGE=en_IN:en PATH=(custom, no user) LANG=en_IN SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.1 root=UUID=a9a86c60-0ac7-48a1-bf57-4f9e35c2bfbf ro locale=en_IN quiet splash radeon.modeset=0 nouveau.modeset=0 video.use_native_backlight=1 vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/07/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A04 dmi.board.name: 0CMF7W dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA04:bd07/07/2015:svnDellInc.:pnInspiron3551:pvrA04:rvnDellInc.:rn0CMF7W:rvrA00:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Inspiron 3551 dmi.product.version: A04 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.64-1~ubuntu14.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.6 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.6 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.6 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Sun Feb 14 10:21:19 2016 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 5578 vendor CMN xserver.version: 2:1.15.1-0ubuntu2.7 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1545394/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

