https://bugzilla.kernel.org/show_bug.cgi?id=209499 R0b0t1 (sid@xxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sid@xxxxxxx --- Comment #1 from R0b0t1 (sid@xxxxxxx) --- I understand your confusion but this is expected. The standard report format for a USB keyboard is 8 bytes. The first byte contains the modifier key state, the second is padding, and the remaining 6 bytes contain key codes. N-key rollover is more a statement of how the switch matrix has been constructed than how many keys you can use in your OS. There are other ways of constructing a switch matrix that are marginally cheaper but lead to the inability to distinguish keys after a certain point; for a typical 84-120 key keyboard the optimal constructions tend to cap out at 6 simultaneous key presses, explaining the choices made in the USB standard. Looking at the lsusb -v output the device shows up as a boot keyboard (slightly more restricted) and a normal keyboard, but both report the expected number of bytes. Your keyboard has more interface information than usual but I am not sure how it is interpreted. It could be sending more bytes back to Windows and Windows may accept them. You may wish to investigate the keyboard from Windows using the USBView tool. -- You are receiving this mail because: You are watching the assignee of the bug.
