You have been subscribed to a public bug: Here I am running a lenovo Helix 2 on a lenovo dock. The dock works (except of the HDMI output, which is another case and filed elsewhere).
So the dock works with headphones, ethernet and its 3 USB-plugs. However, the latter seem to influence each other, like in the good old days when an interrupt was shared. I run a Logitech receiver for mouse and keyboard on the dock, which works fine. This is how it looks like: $ lsusb Bus 002 Device 005: ID 2109:8113 VIA Labs, Inc. Bus 002 Device 004: ID 17ef:3052 Lenovo Bus 002 Device 003: ID 2109:8110 VIA Labs, Inc. Hub Bus 002 Device 002: ID 05e3:0747 Genesys Logic, Inc. Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 009: ID 04f2:b45c Chicony Electronics Co., Ltd Bus 001 Device 006: ID 8087:0a2a Intel Corp. Bus 001 Device 004: ID 1199:a001 Sierra Wireless, Inc. Bus 001 Device 007: ID 17ef:3053 Lenovo Bus 001 Device 008: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 001 Device 005: ID 2109:8112 VIA Labs, Inc. Bus 001 Device 003: ID 2109:8112 VIA Labs, Inc. Bus 001 Device 002: ID 04f2:b45b Chicony Electronics Co., Ltd Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub However, when I plug an external hard disk (2.5") into another USB-plug, the movements of the mouse and the keystrokes are 90% of the time ineffective, respectively the mouse can almost never be moved. Here is how it looks like: $ lsusb Bus 002 Device 007: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technology Corp. Bus 002 Device 005: ID 2109:8113 VIA Labs, Inc. Bus 002 Device 004: ID 17ef:3052 Lenovo Bus 002 Device 003: ID 2109:8110 VIA Labs, Inc. Hub Bus 002 Device 002: ID 05e3:0747 Genesys Logic, Inc. Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 009: ID 04f2:b45c Chicony Electronics Co., Ltd Bus 001 Device 006: ID 8087:0a2a Intel Corp. Bus 001 Device 004: ID 1199:a001 Sierra Wireless, Inc. Bus 001 Device 007: ID 17ef:3053 Lenovo Bus 001 Device 008: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 001 Device 005: ID 2109:8112 VIA Labs, Inc. Bus 001 Device 003: ID 2109:8112 VIA Labs, Inc. Bus 001 Device 002: ID 04f2:b45b Chicony Electronics Co., Ltd Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Removing the hard disk from the dock, respectively plugging the receiver into the tablet itself, solve this problem immediately. I am using the original lenovo power supply. Therefore I can't make out a problem in supply voltage. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: bot-comment -- USB ports conflict with each other https://bugs.launchpad.net/bugs/1817419 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. -- 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