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I recently bought a new keyboard, it was cheap and of an unknown brand but i wasn't particularly worried. I found out that on linux pressing shift, super, left-ctrl or left-alt with this keyboard made no difference, it always take it as shift. I made some researches and it turns out the problem is the chipset used by the keyboard. I read that the only way to solve the problem is to write a driver for the keyboard, but, while working on it i found out that running sudo modprobe usbmon and then opening wireshark as sudo, unexpectedly fixes the problem... someone knows why this happen? and if there is a simpler way to trigger this change?

to be more specific:

  • i'm on xubuntu 18.04
  • dmyco is the brand of the keyboard
  • the result of lsusb is >> Bus 001 Device 004: ID 1c4f:0056 SiGma Micro
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(I would have made this a comment, but it would have been unreadable.)

Since you don't have any answers yet, I can at least give you some reading that may help:

Here's a ton of stuff which relates to modifying the keyboard. Ignore the "compose" stuff to start with:

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