The key codes with atkbd.softraw=0 are the same as posted in the summary:
# single brightness-down 0xe0 0x4c 0xe0 0xcc #single brighness-up 0xe0 0x54 0xe0 0xd4 0xe0 0x4c 0xe0 0xcc
When the brightness level is at either extreme, the key, which can no longer change the brightness does not produce any output in showkey.
The key codes with atkbd.softraw=0 are the same as posted in the summary:
# single brightness-down
0xe0 0x4c 0xe0 0xcc
#single brighness-up
0xe0 0x54 0xe0 0xd4 0xe0 0x4c 0xe0 0xcc
When the brightness level is at either extreme, the key, which can no longer change the brightness does not produce any output in showkey.