Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.18 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc7-vivid/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1336451 Title: Cannot boot/run ubuntu without acpi=off or nolapic. Freezes otherwise. Status in linux package in Ubuntu: Incomplete Bug description: My laptop is a Clevo P570WM with Intel i7-3970X CPU and 2x AMD Radeon HD 7970M GPU's. The distro used is Kubuntu 14.04 x64. Without adding acpi=off or nolapic to the boot flags my laptop freezes a few moments after getting to the login screen. I have tried various kernels but the issue persists on all of them. The issue affects the live CD, the minimal CD and Kubuntu when its installed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1336451/+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
