Public bug reported: This bug started around 3 weeks ago on my Samsung N310 netbook. I run updates at least every two days. I never had any problem with luminosity before then (2 years of using this netbook with several Ubuntu versions).
I'm on Ubuntu 12.04 LTS 32 bits up to date. What I witness: - Often, at boot up, the luminosity flickers heavily. I can not use my computer (clicking doesn't respond) until I play with the luminosity keyboard shortcuts. - Sometimes, it happens in the middle of a session. I can't figure out what triggers it. - I also noticed that, often, I can only choose between full luminosity, backscreen off or minimum luminosity. The intermediate levels are not available (the cursor of the OSD bubble goes automatically all the way to the top or to the bottom). ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-29-generic-pae 3.2.0-29.46 ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24 Uname: Linux 3.2.0-29-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 2.0.1-0ubuntu12 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chtfn 1725 F.... pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf0340000 irq 43' Mixer name : 'Realtek ALC272' Components : 'HDA:10ec0272,144dc052,00100001' Controls : 21 Simple ctrls : 12 Date: Thu Aug 2 11:05:54 2012 HibernationDevice: RESUME=UUID=ea74f8fe-3964-4530-a377-542c052c94ec InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120328) MachineType: SAMSUNG ELECTRONICS CO., LTD. N310 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic-pae root=UUID=d32fcecd-4a85-4801-9be4-2dfe9bd1f769 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-29-generic-pae N/A linux-backports-modules-3.2.0-29-generic-pae N/A linux-firmware 1.79 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: dmi.bios.date: 01/13/2010 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 06BA.M042.20100113.CYH dmi.board.name: N310 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr06BA.M042.20100113.CYH:bd01/13/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN310:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN310:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A: dmi.product.name: N310 dmi.product.version: Not Applicable dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 precise running-unity -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1032005 Title: Samsung N310 screen luminosity flickers randomly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1032005/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs