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There are two USB ports in my computer - right and left. Left one is blue and has SS mark next to it. Right one is gray. Mouse works perfectly in the left port. In the right no. What's more, when I connect mouse via right port, it's not even listed with "lsusb" command.
Any idea about this behavior?
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The blue (SS stands for Super Speed) marked port indicates a USB 3.0 or 3.1 interface, whereas the grey one is presumably a USB 2.0 interface.
Usually USB 3.x devices are backwards compatible to USB 2.0 ports, just with the usual speed constraints.
Do other USB devices work on the grey port?
What's the actual output of lsusb?
What model is your mouse?
Last edited by schard (2020-07-07 10:38:11)
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Sounds like that port isn't connected physically do any other devices work in it?. Maybe post an lsusb and a dmesg. Mice should generally be fine with USB2.0 hubs
Edit: What schard said
Last edited by V1del (2020-07-07 10:37:34)
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Do other USB devices work on the grey port?
Yes, I checked it with two different pendrives.
What's the actual output of lsusb?
While mouse is connected to the blue port:
Bus 004 Device 003: ID 2232:1054 Silicon Motion WebCam SC-10HDD13335N
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 009: ID 0cf3:3004 Qualcomm Atheros Communications AR3012 Bluetooth 4.0
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0461:4e22 Primax Electronics, Ltd USB Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubWhat model is your mouse?
Primax Electronics, Ltd USB Optical Mouse
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Given the output of lsusb, your computer also has an old USB 1.1 controller, to which not all USB 2.0+ devices are backwards compatible.
It is possible, that the grey USB port is actually connected to one of these USB 1.1 controllers.
You can check your computer's BIOS whether there is a config option to switch the USB 1.1 port to USB 2.0.
To check whether my assumption is correct, you can get an empty USB 2.0 or higher pen drive and test the speed when connected to the grey port using the dd-method as described here:
https://www.binarytides.com/linux-test-drive-speed/
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You can check your computer's BIOS whether there is a config option to switch the USB 1.1 port to USB 2.0.
I couldn't find such an option. However, in the BIOS settings (which are graphical) mouse worked connected to both ports.
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