I appear to have the same behavior with a Logitech K520 Keyboard. I was expecting an upgrade to 14.10 to fix it, but it still happens on a 3.16.0-25-generic kernel.
I should point out this doesn't happen instantly after a reboot, but at some point it usually does. I don't know exactly how to reproduce the bug, though, and the only solution I've found is rebooting. -- 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/1318802 Title: 046d:c52b [Acer 5749] Logitech K400 Keyboard lags Status in “linux” package in Ubuntu: Expired Bug description: Unfortunately on the 3.13 kernel the USB wireless keyboard Logitech K400 is not working fine. The mouse (touchpad) movement takes long time to accomplish: short move by finger leads to ten times longer pointer movements. Typing works fine only when typing slow, with pauses between keypresses. Otherwise keys get repeated: Ubuntutut Opeenenn Sourcee The kernel downgrade "solves" the problem. Kernel 3.4 goldfish with 14.04 brings K400 back alive. It works fine with kernel version 3.4, it works also fine and out of the box with 12.04 Ubuntu. I am ready to provide more info, if you explain me, how. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.47 ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: zaur 4372 F.... pulseaudio CurrentDesktop: KDE Date: Mon May 12 22:07:55 2014 HibernationDevice: RESUME=UUID=e5364a02-e506-4a4b-ae01-a2bdaa69b3f1 MachineType: Acer Aspire 5749 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=49c803ce-0cf2-4092-a522-cd8a5a0c151d ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/28/2011 dmi.bios.vendor: INSYDE dmi.bios.version: V1.05 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: HMA51_HR dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnINSYDE:bvrV1.05:bd07/28/2011:svnAcer:pnAspire5749:pvrV1.05:rvnAcer:rnHMA51_HR:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: Aspire 5749 dmi.product.version: V1.05 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1318802/+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
