This might be fixed in the upstream 3.12.5 kernel by this commit (the model name in the patch description is mispelt, but I've checked the patch's source code and it is spelt correctly there, which is what matters):
commit 97b054c2ee8ba8a3542f391641fd78f6e3e44f0a Author: Alan Cox Date: Tue Dec 3 13:56:56 2013 -0800 drivers/char/i8k.c: add Dell XPLS L421X commit 9aa5b0181bdf335f0b731d8502e128a862884bcd upstream. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=60772 Signed-off-by: Alan Cox Reported-by: Leho Kraav Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman ** Bug watch added: Linux Kernel Bug Tracker #60772 http://bugzilla.kernel.org/show_bug.cgi?id=60772 -- 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/1244630 Title: Ubuntu 13.10 fan always on Status in “linux” package in Ubuntu: Incomplete Bug description: System : XPS L421X Bios Version : A12 After the upgrade to Ubuntu 13.10, but maybe also before, in my system the fan are always on. Why ? Thks Vincenzo Graziadei In dmesg I've found this warning : [ 18.080298] ACPI Warning: 0x0000000000000428-0x000000000000042f SystemIO conflicts with Region \PMIO 1 (20130517/utaddress-251) [ 18.080316] ACPI Warning: 0x0000000000000530-0x000000000000053f SystemIO conflicts with Region \_SB_.PCI0.PEG0.PEGP.GPIO 1 (20130517/utaddress-251) [ 18.080320] ACPI Warning: 0x0000000000000530-0x000000000000053f SystemIO conflicts with Region \GPIO 2 (20130517/utaddress-251) [ 18.080324] ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO conflicts with Region \_SB_.PCI0.PEG0.PEGP.GPIO 1 (20130517/utaddress-251) [ 18.080327] ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO conflicts with Region \GPIO 2 (20130517/utaddress-251) [ 18.113551] ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch - Found [Integer], ACPI requires [Package] (20130517/nsarguments-95) [ 18.113590] ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130517/nsarguments-95) [ 18.159532] ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch - Found [Integer], ACPI requires [Package] (20130517/nsarguments-95) [ 18.159565] ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch - Found [Integer], ACPI requires [Package] (20130517/nsarguments-95) [ 19.299558] ACPI Warning: Evaluating _BQC failed (20130517/video-566) --- ApportVersion: 2.12.5-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: enzo 2423 F.... pulseaudio DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=215fb241-2ecd-41c9-a622-7e12673fb00b InstallationDate: Installed on 2012-12-14 (315 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MachineType: Dell Inc. XPS L421X MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic.efi.signed root=UUID=ca585b8f-dd71-4f9f-b83f-6f3f454318ce ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 RelatedPackageVersions: linux-restricted-modules-3.11.0-12-generic N/A linux-backports-modules-3.11.0-12-generic N/A linux-firmware 1.116 Tags: saucy Uname: Linux 3.11.0-12-generic x86_64 UpgradeStatus: Upgraded to saucy on 2013-10-18 (7 days ago) UserGroups: adm cdrom debian-tor dialout dip lpadmin netdev plugdev sambashare sudo dmi.bios.date: 09/28/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A12 dmi.board.name: 08HDPJ dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A12 dmi.modalias: dmi:bvnDellInc.:bvrA12:bd09/28/2012:svnDellInc.:pnXPSL421X:pvrA12:rvnDellInc.:rn08HDPJ:rvrA00:cvnDellInc.:ct8:cvrA12: dmi.product.name: XPS L421X dmi.product.version: A12 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1244630/+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