On Sun, Feb 11, 2024 at 10:34:52AM +0100, Omar Polo wrote: > I can reproduce here. Laptop' print key works, the USB keyboard one > doesn't.
On PS/2 keyboards the print screen key and the pause/break key have special behaviour when operating in set 2. On USB keyboards print screen is basically just a regular key. I did some tests here with a native PS/2 keyboard and the same keyboard connected via this USB to PS/2 adaptor: 0a81:0205 CHESEN, PS2 to USB Converter Connected via PS/2, xev reports the print screen keypress. Connected via USB, it does not. Modifying wskbd_translate() in wskbd.c and adding a printf() call to dump the value of 'value', (great choice of variable name), we can see the following behaviour on the console, (not in X): PS/2 Print Screen: Press: 0xAA 0xB7 Release: 0xB7 0xAA Scroll lock: Press: 0x46 Release: 0x46 Pause/break Press: 0x7F 0x7F Release: nothing SysRq, (I.E. shifted Print Screen) Press: [code of the shift key itself, E.G. 0x36 or 0x2A] 0xB7 Release: 0xB7 [code of the shift key itself] USB Print Screen: Press: 0x46 Release: 0x46 Scroll lock: Press: 0x47 Release: 0x47 Pause/Break Press: 0x48 0x48 Release: nothing SysRq, (I.E. shifted Print Screen) Press: [code of the shift key, E.G. 0xE5] 0x46 Release: 0x46 [code of the shift key] ... which is all what I would have expected.
