boukeas, thank you for reporting this and helping make Ubuntu better. As per http://h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=6943803&swLangOid=8&swEnvOid=4192 an update to your computer's buggy and outdated BIOS is available (1.16). 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 Confirmed. If it's not reproducible, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-1.16 ** Package changed: xorg (Ubuntu) =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/1532975 Title: Screen periodically goes black for a second Status in linux package in Ubuntu: Incomplete Bug description: I am using Ubuntu 14.04.3 on a HP ProBook 430 G2/2246. It is often the case that my screen goes black for a second and then recovers. It is my impression that this only happens when the computer has been idle -- even for a very short time -- so I have disabled screen locking and dimming and I have also removed the gnome-screensaver package, yet the problem persists. I took a look at /var/log/syslog and discovered an identical set of error messages (dump traces, mainly) for every time this happens. I am attaching a file with this set of messages. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 ProcVersionSignature: Ubuntu 3.16.0-57.77~14.04.1-generic 3.16.7-ckt20 Uname: Linux 3.16.0-57-generic 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 CurrentDesktop: Unity Date: Tue Jan 12 00:02:52 2016 DistUpgraded: Fresh install DistroCodename: trusty DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:2246] InstallationDate: Installed on 2015-04-20 (266 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) MachineType: Hewlett-Packard HP ProBook 430 G2 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-57-generic root=UUID=3a069045-f0b3-46ac-b25f-057beaa48b7e ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/16/2014 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: M74 Ver. 01.04 dmi.board.name: 2246 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 67.22 dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvrM74Ver.01.04:bd08/16/2014:svnHewlett-Packard:pnHPProBook430G2:pvrA3008CD10003:rvnHewlett-Packard:rn2246:rvrKBCVersion67.22:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP ProBook 430 G2 dmi.product.version: A3008CD10003 dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.12+14.10.20140812-0ubuntu1.01 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri N/A version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Thu Dec 31 15:19:11 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 14425 vendor SEC xserver.version: 2:1.16.0-1ubuntu1.2~trusty2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1532975/+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
