Vojtěch Látal, thank you for reporting this and helping make Ubuntu better. As per http://www.dell.com/support/home/us/en/19/product-support/product/latitude-e5520/drivers an update to your BIOS is available (A14). If you update to this following https://help.ubuntu.com/community/BiosUpdate does it change anything? If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Thank you for your understanding. ** Tags added: bios-outdated-a14 ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1327581 Title: Dell Latitude E5520 Status in “linux” package in Ubuntu: Incomplete Bug description: After the upgrade from 13.10 to 14.04 fan on my Dell Latitude E5520 is working weird. It works in cycles as follows: 100% for about 0.1s 0% 0.1s cca 60% for 2 - x seconds, depending on cpu temperature I think. Before the upgrade fan speed has been set depending on cpu temperature SMOOTHLY with some hysteresis. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-29-generic 3.13.0-29.53 ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2 Uname: Linux 3.13.0-29-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: latal 3590 F.... pulseaudio /dev/snd/pcmC0D0p: latal 3590 F...m pulseaudio CurrentDesktop: Unity Date: Sat Jun 7 17:54:29 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2012-07-10 (696 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: Dell Inc. Latitude E5520 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic root=UUID=83b4c35b-1649-4b2c-9d62-5c56bdcaa949 ro quiet splash intel_pstate=enable vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-29-generic N/A linux-backports-modules-3.13.0-29-generic N/A linux-firmware 1.127.2 SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-05-09 (29 days ago) dmi.bios.date: 11/30/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 03PH4G dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA05:bd11/30/2011:svnDellInc.:pnLatitudeE5520:pvr01:rvnDellInc.:rn03PH4G:rvrA01:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E5520 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1327581/+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