This remains with a different kernel (3.11) and a totally different laptop, bios and trackball (though it's an identical model - I have two). I don't think the model is that relevant, as it also applies to a generic USB keyboard I'm using.
I'm now in a position to replicate the bug on two different laptops - a Toshiba R600 and a Dell N5110 eliminating the BIOS issue as a possible cause I think. It's been a latent bug for me as it's a rare occasion that I'm using external keyboard and trackball WITHOUT power - normally those things go together when I'm docked at a desk in the office. However, I just rediscovered the bug when a colleague removed my power without me noticing. Another line of investigation is the use of powertop scripts for auto-unloading of USB modules as listed in the duplicate bug I've filed... https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1215476 ...though this is expected to 'just work' and indeed the bug remains even when auto-unloading is explicitly deactivated (though there may be a bug there I suppose - the power/control sys bus files report that the unloading config has changed from 'auto' to 'on', but it still seems to disconnect the devices). -- 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/1060029 Title: Wired trackball fails while on battery power (module unload issue?) Status in “linux” package in Ubuntu: Incomplete Bug description: I have a wired trackball which identifies itself through lsusb as... Bus 003 Device 013: ID 047d:1022 Kensington Orbit Optical This device is perfectly functional when my Dell Q15R (N5110) is powered from the mains, but when running on battery, the device lasts something like 10 seconds before being disabled. Unplugging and replugging the trackball gets you another 10 seconds. Keeping moving the pointer can sustain the function of the trackball, until you leave the pointer still for 10 seconds, and then it's disabled. Plugging the mains back in and replugging the trackball means the trackball keeps functioning indefinitely. I don't know what kind of power module unload is built in to 12.04. Is it possible that something is being unloaded which shouldn't be? Any suggestions for workarounds? I'd really like to be able to use my trackball when running on battery. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-31-generic-pae 3.2.0-31.50 ProcVersionSignature: Ubuntu 3.2.0-31.50-generic-pae 3.2.28 Uname: Linux 3.2.0-31-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu13 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: cefn 3039 F.... pulseaudio /dev/snd/controlC0: cefn 3039 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xf7b00000 irq 55' Mixer name : 'IDT 92HD87B1/3' Components : 'HDA:111d76d1,102804b0,00100205' Controls : 17 Simple ctrls : 10 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xf6080000 irq 17' Mixer name : 'Nvidia GPU 14 HDMI/DP' Components : 'HDA:10de0014,10de0101,00100100' Controls : 24 Simple ctrls : 4 Date: Tue Oct 2 08:31:10 2012 HibernationDevice: RESUME=UUID=cc61e7ac-1394-458b-8963-4731567fabad InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423.2) MachineType: Dell Inc. Inspiron N5110 ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcFB: 0 nouveaufb 1 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-31-generic-pae root=UUID=c9767810-263a-424a-80cd-714fd4a9afa1 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/cefn not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.2.0-31-generic-pae N/A linux-backports-modules-3.2.0-31-generic-pae N/A linux-firmware 1.79.1 SourcePackage: linux StagingDrivers: mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/22/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A10 dmi.board.name: 0HVRTT dmi.board.vendor: Dell Inc. dmi.board.version: A10 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA10:bd03/22/2012:svnDellInc.:pnInspironN5110:pvrNotSpecified:rvnDellInc.:rn0HVRTT:rvrA10:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Inspiron N5110 dmi.product.version: Not Specified dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1060029/+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
