Christopher Barrington-Leigh, thank you for reporting this and helping make Ubuntu better.
In order to allow additional upstream developers to examine the issue, at your earliest convenience, could you please test the latest upstream kernel available from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ? Please keep in mind the following: 1) The one to test is at the very top line at the top of the page (not the daily folder). 2) The release names are irrelevant. 3) The folder time stamps aren't indicative of when the kernel actually was released upstream. 4) Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . If testing on your main install would be inconvenient, one may: 1) Install Ubuntu to a different partition and then test this there. 2) Backup, or clone the primary install. If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description: kernel-fixed-upstream kernel-fixed-upstream-X.Y-rcZ Where X, and Y are the first two numbers of the kernel version, and Z is the release candidate number if it exists. If the mainline kernel does not fix the issue, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-X.Y-rcZ Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream. Also, you don't need to apport-collect further unless specifically requested to do so. Once testing of the latest upstream kernel is complete, please mark this report Status Confirmed. Please let us know your results. Thank you for your understanding. ** Tags added: bios-outdated-1.22 regression-release ** Changed in: linux (Ubuntu) Importance: Critical => High ** 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/1585598 Title: steady decrease in available memory (RAM) under 16.04 Status in linux package in Ubuntu: Incomplete Bug description: I've just upgraded to 16.04 from 15.10, and now the memory usage steadily increases from when I first boot up. After just an hour or two, all 20GB of RAM is used up, even if nothing is running, and I am forced to reboot (rebooting frequently is incompatible with my normal tasks). Here is output from free, spaced about half a second apart: [0753][me@-t450s:~]$ free -m total used free shared buff/cache available Mem: 19958 1001 5808 7147 13148 11648 Swap: 20358 0 20358 [0753][me@-t450s:~]$ free -m total used free shared buff/cache available Mem: 19958 1001 5806 7148 13151 11647 Swap: 20358 0 20358 [0753][me@-t450s:~]$ free -m total used free shared buff/cache available Mem: 19958 1001 5804 7149 13153 11646 Swap: 20358 0 20358 [0753][me@-t450s:~]$ free -m total used free shared buff/cache available Mem: 19958 1001 5801 7151 13156 11644 Swap: 20358 0 20358 htop shows that 8GB is in use, although there are no applications using much. I understand from free that it is all buffered/cached? Both htop and free suggest that the memory is really not available. I do not know where it is going. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-22-generic 4.4.0-22.40 ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8 Uname: Linux 4.4.0-22-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: cpbl 2571 F.... pulseaudio /dev/snd/controlC1: cpbl 2571 F.... pulseaudio /dev/snd/controlC0: cpbl 2571 F.... pulseaudio CurrentDesktop: Unity Date: Wed May 25 07:54:14 2016 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=e5d0a2bb-27cf-494a-849c-1985d165fbd7 InstallationDate: Installed on 2016-02-12 (102 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: LENOVO 20BXCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic.efi.signed root=UUID=ea2fb511-8d62-4b96-bdaa-4b3f7bf79cc6 ro noprompt quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-22-generic N/A linux-backports-modules-4.4.0-22-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-05-24 (0 days ago) dmi.bios.date: 11/06/2015 dmi.bios.vendor: LENOVO dmi.bios.version: JBET54WW (1.19 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BXCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET54WW(1.19):bd11/06/2015:svnLENOVO:pn20BXCTO1WW:pvrThinkPadT450s:rvnLENOVO:rn20BXCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20BXCTO1WW dmi.product.version: ThinkPad T450s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1585598/+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
