Public bug reported: Without adding noapic or nolapic to boot parameters the fan will run on full speed, the system is sluggish (can almost see windows redrawing on screen). On some kernel versions tested, rebooting also fails.
The parameter(s) were not required in Trusty. I also tested some Mainline kernels and discovered 3.19.8 and 4.0.9 works without the parameters. At least 4.1.29 and onward requires noapic or nolapic for this machine to work properly but I have yet to investigate the versions between 4.0.9 and 4.1.29. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-34-generic 4.4.0-34.53 ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 Uname: Linux 4.4.0-34-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: diskdoc 2700 F.... pulseaudio CurrentDesktop: XFCE Date: Wed Aug 10 01:15:07 2016 HibernationDevice: RESUME=UUID=522810df-638a-412b-9aab-791e2e2bc545 InstallationDate: Installed on 2016-06-07 (63 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: Hewlett-Packard HP Compaq 6715s (RU655ET#AK8) PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic root=UUID=3a37ee65-4c02-4a95-b814-f4538a4a308d ro quiet splash noapic acpi_force_32bit_fadt_addr vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-34-generic N/A linux-backports-modules-4.4.0-34-generic N/A linux-firmware 1.157.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2011 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68YTT Ver. F.20 dmi.board.name: 30C2 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 71.2D dmi.chassis.asset.tag: CNU7201T8J dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68YTTVer.F.20:bd12/01/2011:svnHewlett-Packard:pnHPCompaq6715s(RU655ET#AK8):pvrF.20:rvnHewlett-Packard:rn30C2:rvrKBCVersion71.2D:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP Compaq 6715s (RU655ET#AK8) dmi.product.version: F.20 dmi.sys.vendor: Hewlett-Packard ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug xenial ** Summary changed: - Fan on full speed without noapic or nolapic + Fan on full speed without noapic or nolapic on HP 6715s -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1611536 Title: Fan on full speed without noapic or nolapic on HP 6715s To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1611536/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs