Sent patch to Ubuntu kteam ML. For vivid/utopic. Thanks for the bug report and research!
** Description changed: - I'm running 64 bit ubuntu 14.10 on an Asus N550JK-DB74T laptop. When I startup Ubuntu the system load climbs to 1.00 within a minute, and it never goes below 1.00 again, despite my processor being idle. This behavior occurs in all the newer kernels I installed from http://kernel.ubuntu.com/~kernel-ppa/mainline/ but when I installed the kernel from ubuntu 14.04, as well when I ran the ubuntu 14.04 from a usb the load average behaved normally, so the bug must have started in either kernel 3.15 or 3.16. - - When I posted this to ubuntu forums, a very helpful person able to point me to this bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=765717 and to this submitted patch https://lkml.org/lkml/2014/11/5/905 . When I applied that patch to kernel 3.16 my issue was solved. However it doesn't seem that this patch has been has been merged into the kernel, even though it was submitted well in time for the 3.19 merge window. I was advised to file this bug report in the meantime. + SRU Justification: + [Impact] + Users of devices that use the rtsx_usb_ms module will experience false load values due to an issue in this driver. + [Test Case] + Boot computer and monitor load levels. + [Fix] + This patch by Ben Hutchings: https://lkml.org/lkml/2014/11/5/905 + Has been applied to Debian/3.16, and has been posted upstream. + + -- + + I'm running 64 bit ubuntu 14.10 on an Asus N550JK-DB74T laptop. When I + startup Ubuntu the system load climbs to 1.00 within a minute, and it + never goes below 1.00 again, despite my processor being idle. This + behavior occurs in all the newer kernels I installed from + http://kernel.ubuntu.com/~kernel-ppa/mainline/ but when I installed the + kernel from ubuntu 14.04, as well when I ran the ubuntu 14.04 from a usb + the load average behaved normally, so the bug must have started in + either kernel 3.15 or 3.16. + + When I posted this to ubuntu forums, a very helpful person able to point + me to this bug report: https://bugs.debian.org/cgi- + bin/bugreport.cgi?bug=765717 and to this submitted patch + https://lkml.org/lkml/2014/11/5/905 . When I applied that patch to + kernel 3.16 my issue was solved. However it doesn't seem that this + patch has been has been merged into the kernel, even though it was + submitted well in time for the 3.19 merge window. I was advised to file + this bug report in the meantime. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-29-generic 3.16.0-29.39 ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2 Uname: Linux 3.16.0-29-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC1: dave 2338 F.... pulseaudio - /dev/snd/controlC0: dave 2338 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC1: dave 2338 F.... pulseaudio + /dev/snd/controlC0: dave 2338 F.... pulseaudio CurrentDesktop: Unity Date: Wed Jan 21 05:14:38 2015 InstallationDate: Installed on 2014-12-30 (22 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: ASUSTeK COMPUTER INC. N550JK ProcEnviron: - LANGUAGE=en_US - PATH=(custom, no user) - XDG_RUNTIME_DIR=<set> - LANG=en_US.UTF-8 - SHELL=/bin/bash + LANGUAGE=en_US + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-29-generic.efi.signed root=UUID=b5b33d3f-e01a-4d2b-824f-8883fbfed316 ro quiet splash acpi_osi= vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.16.0-29-generic N/A - linux-backports-modules-3.16.0-29-generic N/A - linux-firmware 1.138.1 + linux-restricted-modules-3.16.0-29-generic N/A + linux-backports-modules-3.16.0-29-generic N/A + linux-firmware 1.138.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/26/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N550JK.208 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N550JK dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN550JK.208:bd09/26/2014:svnASUSTeKCOMPUTERINC.:pnN550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N550JK dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1413149 Title: rtsx_usb_ms: system load immediately climbs, and stays above 1.00 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1413149/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
