Well, I rally tried to identify the cause of this problem but with no success. There isn't a pattern. Anyway, I'm almost sure that is the video driver because of the following: one thing I forgot to mention is that, as a workaround, when the system is lagging I press the "Super" button to open the dash and the system stop lagging. It seems that it is a composite/driver/3D issue. Using other desktop environment like Enlightenment (with composite enabled) does the same lagging - so it is not related with unity.
About the command you said, could you explain me more about? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1188874 Title: [gm45] Environment lagging randomly Status in “xserver-xorg-video-intel” package in Ubuntu: New Bug description: While using the system, it begins to lag without any apparent cause. There is no report on Xorg. There is no report on dmesg log. There is no increase of CPU usage. There is no increase of RAM usage. The driver are updated with the latest stable realease. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: xserver-xorg-video-intel 2:2.21.6-0ubuntu4 ProcVersionSignature: Ubuntu 3.8.0-24.35-generic 3.8.13 Uname: Linux 3.8.0-24-generic x86_64 NonfreeKernelModules: wl .tmp.unity.support.test.0: ApportVersion: 2.9.2-0ubuntu8.1 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: Fri Jun 7 21:05:34 2013 DistUpgraded: Fresh install DistroCodename: raring DistroVariant: ubuntu DkmsStatus: bcmwl, 6.20.155.1+bdcom, 3.8.0-19-generic, x86_64: installed bcmwl, 6.20.155.1+bdcom, 3.8.0-21-generic, x86_64: installed bcmwl, 6.20.155.1+bdcom, 3.8.0-22-generic, x86_64: installed bcmwl, 6.20.155.1+bdcom, 3.8.0-24-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device [1025:048a] Subsystem: Acer Incorporated [ALI] Device [1025:048a] InstallationDate: Installed on 2013-05-14 (24 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MachineType: Acer Aspire 5736Z MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-24-generic root=UUID=bbcdd2e2-ab4e-4f13-935a-9cf4185d402b ro locale=pt_BR quiet splash acpi_osi= vt.handoff=7 SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/23/2010 dmi.bios.vendor: Acer dmi.bios.version: V1.04 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: JE51_MV dmi.board.vendor: Acer dmi.board.version: V1.04 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.04 dmi.modalias: dmi:bvnAcer:bvrV1.04:bd09/23/2010:svnAcer:pnAspire5736Z:pvrV1.04:rvnAcer:rnJE51_MV:rvrV1.04:cvnAcer:ct10:cvrV1.04: dmi.product.name: Aspire 5736Z dmi.product.version: V1.04 dmi.sys.vendor: Acer version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.43-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.3-0ubuntu0.1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental 9.1.3-0ubuntu0.1 version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.3-0ubuntu0.1 version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 xserver.bootTime: Fri Jun 7 20:40:44 2013 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.13.3-0ubuntu6 xserver.video_driver: intel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1188874/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
