When I jumped for 11.XX to 12.04 LTS, the problem seemed to have subsided to a slight extent. I dont know how far is this true, but this is just my observation. Because I can still do something, and its not a 100% clogged CPU.
Its pretty strange that such a huge bug is still unassigned by Ubuntu. Kindof motivates us to leave this distro ! ;( Regards, > Date: Fri, 8 Jun 2012 11:40:03 +0000 > From: till.seur...@gmail.com > To: aamir...@hotmail.com > Subject: [Bug 962712] Re: Battery charging slows down my thinkpad severely > > Hi, sorry for the late answer. I wanted to see if the problem still > persisted when doing a clean install of Ubuntu 12.04 LTS. So I did it > yesterday and the problem still exists. I also installed Windows 7 and > the problem seems not to exist on Windows. Have you have found any > solution? > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/962712 > > Title: > Battery charging slows down my thinkpad severely > > Status in “xserver-xorg-video-intel” package in Ubuntu: > Confirmed > > Bug description: > I have a ThinkPad L520 (7859-5BG) Core i5-2520M(2.5GHz) with 4GB RAM > and Ubuntu 11.10 32-bit install and with gnome classic (no effects) > environment > > Condition: > When my battery is charging via power adapter, system is severely slow. > This is most often visible when just about every process takes very high CPU > (e.g. gnome-panel consuming 60% or chrome consuming 118% of CPU). Working > with the laptop is almost impossible due to very slow processing. Clicking > "applications" in panel takes 1 second to appear. > > During the above state - as soon as I disconnect my power adapter, CPU > usage drops to less than 10%, and system becomes super smooth and > quick again. Also, when the battery gets completely charged, laptop > (kindof) stops lagging much. Also, I took my battery out of my > laptop, and powered it directly via AC adapter, and system was super > smooth. > > My laptop is dual-boot (despite my hatred for Windows), and I have > tested battery charging on Windows. THere is NO LAG AT ALL ! This > confirms that there is no hardware fault, as windows is quick and fast > during battery charging. > > The state of the system is confirmed - means I can recreate the > problem almost every time. I have tried "top" to see processes and how > they look, but no "strange" process is there for one to be able to > kill. Its essentially the same processes that start hogging my CPU > completely (chrome, nautilus, gnome-panel, just-any-running- > process.... ) > > I have also tried another brand new charger from Lenovo - but same > problem there. > > ProblemType: Bug > DistroRelease: Ubuntu 11.10 > Package: xorg 1:7.6+7ubuntu7.1 > ProcVersionSignature: Ubuntu 3.0.0-16.29-generic-pae 3.0.20 > Uname: Linux 3.0.0-16-generic-pae i686 > .tmp.unity.support.test.0: > > ApportVersion: 1.23-0ubuntu4 > Architecture: i386 > CompizPlugins: > [core,bailer,detection,composite,opengl,compiztoolbox,decor,imgpng,move,snap,grid,gnomecompat,resize,regex,animation,vpswitch,mousepoll,unitymtgrabhandles,place,wall,session,workarounds,expo,fade,ezoom,scale,unityshell] > CompositorRunning: None > Date: Fri Mar 23 02:09:39 2012 > DistUpgraded: Fresh install > DistroCodename: oneiric > DistroVariant: ubuntu > ExtraDebuggingInterest: Yes, if not too technical > GraphicsCard: > Intel Corporation 2nd Generation Core Processor Family Integrated Graphics > Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) > Subsystem: Lenovo Device [17aa:21dd] > InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012) > MachineType: LENOVO 78595BG > ProcEnviron: > PATH=(custom, no user) > LANG=en_US.UTF-8 > SHELL=/bin/bash > ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-16-generic-pae > root=UUID=dec2de3b-50bd-4850-b890-b645f6457392 ro quiet splash vt.handoff=7 > SourcePackage: xorg > Symptom: display > UpgradeStatus: No upgrade log present (probably fresh install) > dmi.bios.date: 11/04/2011 > dmi.bios.vendor: LENOVO > dmi.bios.version: 8GET38WW (1.15 ) > dmi.board.name: 78595BG > dmi.board.vendor: LENOVO > dmi.board.version: Not Available > dmi.chassis.asset.tag: No Asset Information > dmi.chassis.type: 10 > dmi.chassis.vendor: LENOVO > dmi.chassis.version: Not Available > dmi.modalias: > dmi:bvnLENOVO:bvr8GET38WW(1.15):bd11/04/2011:svnLENOVO:pn78595BG:pvrThinkPadL520:rvnLENOVO:rn78595BG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: > dmi.product.name: 78595BG > dmi.product.version: ThinkPad L520 > dmi.sys.vendor: LENOVO > version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6.1 > version.libdrm2: libdrm2 2.4.26-1ubuntu1 > version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3 > version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A > version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3 > version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1 > version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13 > version.xserver-xorg-video-ati: xserver-xorg-video-ati > 1:6.14.99~git20110811.g93fc084-0ubuntu1 > version.xserver-xorg-video-intel: xserver-xorg-video-intel > 2:2.15.901-1ubuntu2.1 > version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau > 1:0.0.16+git20110411+8378443-1 > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/962712/+subscriptions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/962712 Title: Battery charging slows down my thinkpad severely To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/962712/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
