apport information ** Tags added: apport-collected
** Description changed: Hi, I have just installed Ubuntu 10.04 LTS 32 Bit on my Compaq Presario CQ40 616TU laptop. My screen flickers (Horizontal Line flicks) in few second interval when running on battery power or when I lower screen brightness. This is really annoying and hard to work. Here are the details: 1. Issue occurs when running on battery power or low screen brightness and is reduced(with a little flickering at bottom of the screen) or almost gone when connected to AC power adapter. 2. The screen also flickers while booting. However it is maximum on battery power. 3. I use Compaq CQ40 616-TU laptop with Intel Graphics Media Accelerator 4500 graphics. 4. I tried Mandrive One Spring 10 and also experienced the same problem. 5. My graphics is "Intel Graphics Media Accelerator 4500M". The bellow link is the specification for my laptop. http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01869756&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=in&lang=en&product=4033201 I was using windows& before but never notice this problem. I changed the Grub file and added i915.powersaver=0 but it did not work. However if I use the laptop with high brightness the problem is reduced (with a little flickering at bottom of the screen) or gone. I think it is a bug in linux kernel. Thanks Bishnu + --- + Architecture: i386 + DistroRelease: Ubuntu 10.04 + GnomeSessionIdleInhibited: No + GnomeSessionInhibitors: None + GnomeSessionSuspendInhibited: No + InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429) + MachineType: Hewlett-Packard Compaq Presario CQ40 Notebook PC + NonfreeKernelModules: wl + Package: gnome-power-manager 2.30.0-0ubuntu1 + PackageArchitecture: i386 + ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-25-generic root=UUID=ed1d8294-4017-4abf-8489-b49233812fa5 ro i915.powersave=1 quiet splash + ProcEnviron: + LANG=en_IN + SHELL=/bin/bash + ProcVersionSignature: Ubuntu 2.6.32-25.44-generic 2.6.32.21+drm33.7 + Tags: lucid + Uname: Linux 2.6.32-25-generic i686 + UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare + dmi.bios.date: 05/18/2010 + dmi.bios.vendor: Insyde + dmi.bios.version: F.66 + dmi.board.asset.tag: Base Board Asset Tag + dmi.board.name: 3607 + dmi.board.vendor: Hewlett-Packard + dmi.board.version: 99.C3 + dmi.chassis.type: 10 + dmi.chassis.vendor: Hewlett-Packard + dmi.chassis.version: N/A + dmi.modalias: dmi:bvnInsyde:bvrF.66:bd05/18/2010:svnHewlett-Packard:pnCompaqPresarioCQ40NotebookPC:pvr0395120000000D10000000000:rvnHewlett-Packard:rn3607:rvr99.C3:cvnHewlett-Packard:ct10:cvrN/A: + dmi.product.name: Compaq Presario CQ40 Notebook PC + dmi.product.version: 0395120000000D10000000000 + dmi.sys.vendor: Hewlett-Packard ** Attachment added: "BootDmesg.txt" https://bugs.edge.launchpad.net/bugs/648588/+attachment/1643765/+files/BootDmesg.txt -- Compaq Laptop Screen flickers with Ubuntu 10.04, when on battery power https://bugs.launchpad.net/bugs/648588 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
