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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1817419
Title:
USB ports conflict with each other
Status in linux package in Ubuntu:
Incomplete
Bug description:
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.
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