A can confirm this problem with latest bios 2.22 ... any help? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1268669
Title: Lenovo T440p (Haswell/NVidia optimus gfx) flaky unless I blacklist nouveau Status in “linux” package in Ubuntu: Triaged Bug description: I have a new Lenovo T440p laptop, which has a Haswell CPU and NVidia GPU in an "optimus" setup. In a default 14.04 install, the system is quite flaky: suspend doesn't work and doing lspci apparently corrupts memory (the system hits random weird failures and then freezes about 10 seconds after running lspci). If I blacklist the nouveau module then the system seems to work fine (suspend/resume is good and lspci doesn't cause problems). ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-2-generic 3.13.0-2.17 ProcVersionSignature: Ubuntu 3.13.0-2.17-generic 3.13.0-rc7 Uname: Linux 3.13.0-2-generic x86_64 ApportVersion: 2.13.1-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: roland 2111 F.... pulseaudio CurrentDesktop: Unity Date: Mon Jan 13 09:35:00 2014 HibernationDevice: RESUME=UUID=af5ffc5d-f07d-48f1-8bab-636acd0359be InstallationDate: Installed on 2014-01-11 (2 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140109) MachineType: LENOVO 20ANCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-2-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro plymouth:debug splash quiet drm.debug=0xe RelatedPackageVersions: linux-restricted-modules-3.13.0-2-generic N/A linux-backports-modules-3.13.0-2-generic N/A linux-firmware 1.121 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/04/2013 dmi.bios.vendor: LENOVO dmi.bios.version: GLET43WW (1.18 ) dmi.board.asset.tag: Not Available dmi.board.name: 20ANCTO1WW dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGLET43WW(1.18):bd12/04/2013:svnLENOVO:pn20ANCTO1WW:pvrThinkPadT440p:rvnLENOVO:rn20ANCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20ANCTO1WW dmi.product.version: ThinkPad T440p dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1268669/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
