Eugene Romanenko, thank you for reporting this and helping make Ubuntu better.
As per http://support.lenovo.com/us/en/products/Laptops-and-netbooks /Flex-Series/Flex-2-14-Notebook- Lenovo?tabName=Downloads&linkTrack=Mast:SubNav:Support:Drivers%20and%20Software|Drivers%20and%20Software&beta=false an update to your computer's buggy, insecure, and outdated BIOS is available (A0CN37WW). 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. Also, 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 ** Tags added: bios-outdated-a0cn37ww ** Changed in: xorg (Ubuntu) Importance: Undecided =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/1579403 Title: Random characters in screen text suddenly disappear after wake from sleep or switching user Status in xorg package in Ubuntu: Incomplete Bug description: After wake from sleep or switching user, characters suddenly disappear. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6 Uname: Linux 4.4.0-18-generic x86_64 NonfreeKernelModules: wl .tmp.unity_support_test.0: ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 BootLog: 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: Sat May 7 20:51:58 2016 DistUpgraded: 2016-03-03 21:54:17,365 DEBUG enabling apt cron job DistroCodename: xenial DistroVariant: ubuntu DkmsStatus: bcmwl, 6.30.223.271+bdcom, 4.4.0-18-generic, x86_64: installed bcmwl, 6.30.223.271+bdcom, 4.4.0-21-generic, x86_64: installed bcmwl, 6.30.223.271+bdcom, 4.4.0-22-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller]) Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:3978] InstallationDate: Installed on 2015-12-02 (156 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 006: ID 04f3:0446 Elan Microelectronics Corp. Bus 001 Device 003: ID 105b:e065 Foxconn International, Inc. BCM43142A0 Bluetooth module Bus 001 Device 002: ID 0c45:6514 Microdia Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 20404 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-18-generic.efi.signed root=UUID=fe6b4e61-411f-4d2c-8503-d340e6c8bd4c ro quiet splash pcie_aspm i915.lvds_downclock=1 i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to xenial on 2016-03-03 (64 days ago) dmi.bios.date: 05/21/2014 dmi.bios.vendor: LENOVO dmi.bios.version: A0CN26WW dmi.board.asset.tag: No Asset Tag dmi.board.name: Lenovo Flex 2-14 dmi.board.vendor: LENOVO dmi.board.version: 31900058 Std dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Flex 2-14 dmi.modalias: dmi:bvnLENOVO:bvrA0CN26WW:bd05/21/2014:svnLENOVO:pn20404:pvrLenovoFlex2-14:rvnLENOVO:rnLenovoFlex2-14:rvr31900058Std:cvnLENOVO:ct10:cvrLenovoFlex2-14: dmi.product.name: 20404 dmi.product.version: Lenovo Flex 2-14 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Fri May 6 18:09:14 2016 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 1094 vendor LGD xserver.version: 2:1.18.3-1ubuntu2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1579403/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
