Comment 0 for bug 1603659

This issue is a regression after update to 16.04 (coming from 14.04). To my knowledge, I was using TLP together with 14.04, which got removed during the upgrade in favour of upower.

Two devices behave unexpected reproducably after a fresh reboot:

Bus 002 Device 005: ID 413c:8187 Dell Computer Corp. DW375 Bluetooth Module
Bus 002 Device 004: ID 046a:0023 Cherry GmbH CyMotion Master Linux Keyboard G230

It looks like a power management related issue. By default,
- USB mouse pointer is invisible and mouse looses any event unless I press a mouse button (which also is executed in a dangerous manner at the last position of the invisible pointer)
- USB keyboard is inactive unless I press a few keys. These first characters get lost in the output
- This happens directly after reboot (e.g. first characters of password get lost, mouse is invisible).
- After login, it still happens: After a few seconds of inactivity, mouse and keyboard are non-responsive again.
- In addition, I also experience lost events without any delay from time to time
- In addition, scrolling with the mouse is laggy in particular

Most of these problems are gone as soon as I disable powersave in powertop for mouse and keyboard:

Bad Automatische Bereitschaft für USB-Gerät G400s Optical Gaming Mouse [Logitech]
Bad Automatische Bereitschaft für unbekanntes USB-Gerät 2-1.2 [046a:0023]

The only remaining problem is laggy scrolling and sometimes loosing events like keyboard presses, but this could still be another issue.

The powertop status of other USB devices does not have an effect on this workaround. However, the workaround via powertop is lost after next reboot.

It also has no effect when changing USB-Ports or USB-Controllers. I tried
- built-in USB 2.0 Ports of my DELL Latitude E5510 (1d6b:0002)
- replicated USB 2.0 ports of my docking station PR02X (1d6b:0002)
- PCMCIA USB 3.0 Express card (1d6b:0003)

Accordingly, this issue is not related to particular USB controllers/hubs. Plus, as two non-related USB hardware devices are concerned, this issue also might not be related to particular USB devices, bat rather affect many USB devices.

I don't experience any problems when using the built-in keyboard of the DELL Latitude E5510.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-31-generic 4.4.0-31.50
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: thomas 3933 F.... pulseaudio
CurrentDesktop: GNOME-Flashback:Unity
Date: Sat Jul 16 17:43:05 2016
HibernationDevice: RESUME=UUID=28eded29-f9e6-44b5-9e54-c4dd60c8e3cd
InstallationDate: Installed on 2014-11-29 (595 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Dell Inc. Latitude E5510
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-31-generic root=UUID=6408c2d9-1b60-43d7-9a7f-2dceeb40de28 ro rootflags=subvol=@ quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-31-generic N/A
 linux-backports-modules-4.4.0-31-generic N/A
 linux-firmware 1.157.2
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-06-15 (30 days ago)
dmi.bios.date: 12/06/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A16
dmi.board.name: 023HKR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA16:bd12/06/2013:svnDellInc.:pnLatitudeE5510:pvr0001:rvnDellInc.:rn023HKR:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5510
dmi.product.version: 0001
dmi.sys.vendor: Dell Inc.