Public bug reported: I have installed v14.04 LTS 64 bit on Acer Aspire One 722 and everything works fine. I then connected an external monitor via HDMI. The external monitor (a HDTV) displays the laptop screen correctly.
But when I close the screen of the laptop with the external monitor connected (putting the laptop to sleep), and open the screen to bring back the laptop out of sleep mode, the screen of the laptop and the external monitor are black with some garbled characters. The only way to recover the session is to shut power off abruptly, and cold boot the laptop. However, if I use the suspend button to put the laptop to sleep, and then bring the laptop out of sleep mode, the laptop screen and the external monitor display the desktop correctly. Can someone please help me understand why closing the laptop screen causes issues that are not present when I use the suspend command, and point me to a solution? Ubuntu 14.04 LTS 64 bit version viswa@netbook:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.1 LTS Release: 14.04 Codename: trusty uname -r: 3.11.0-18-generic ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8 ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4 Uname: Linux 3.11.0-18-generic x86_64 NonfreeKernelModules: fglrx wl .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.6 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: Sat Jan 24 05:26:41 2015 DistUpgraded: 2014-04-22 18:27:56,752 DEBUG enabling apt cron job DistroCodename: trusty DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: No GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler [Radeon HD 6250] [1002:9804] (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device [1025:0598] InstallationDate: Installed on 2013-10-27 (453 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: Acer AO722 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-18-generic root=UUID=2eac150f-27b7-4f54-879d-5a176d9b6e87 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to trusty on 2014-04-22 (276 days ago) dmi.bios.date: 03/25/2011 dmi.bios.vendor: Acer dmi.bios.version: V1.01 dmi.board.name: AO722 dmi.board.vendor: Acer dmi.board.version: V1.01 dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAcer:bvrV1.01:bd03/25/2011:svnAcer:pnAO722:pvrV1.01:rvnAcer:rnAO722:rvrV1.01:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: AO722 dmi.product.version: V1.01 dmi.sys.vendor: Acer version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1 version.fglrx-installer: fglrx-installer N/A version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.56-1~ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.3 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.6 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 2:2.99.910-0ubuntu1.3 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Fri Jan 23 17:54:44 2015 xserver.configfile: default xserver.errors: open /dev/dri/card0: No such file or directory AIGLX error: failed to open /usr/X11R6/lib64/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib64/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory] AIGLX error: failed to open /usr/lib64/dri/fglrx_dri.so, error[/usr/lib64/dri/fglrx_dri.so: cannot open shared object file: No such file or directory] AIGLX error: failed to open /usr/X11R6/lib/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory] evdev: CHICONY HP Basic USB Keyboard: Unable to open evdev device "/dev/input/event15". xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.15.1-0ubuntu2.6 xserver.video_driver: fglrx ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug compiz-0.9 corruption trusty ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1414278 Title: v14.04 screen garbled when waking from sleep w/external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1414278/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs