[Bug 221583] Lenovo 82KU: keyboard backlight works via Fn+Space but no kbd_backlight LED device exposed

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221583

--- Comment #32 from Rong Zhang (i@rong.moe) ---
Then I doubt if clearing KBLO actually also clears 0x2A.

Try:

1. Set physical keyboard brightness to Low
2. sudo busybox devmem 0xFE00D42A 8 0x05
3. sudo busybox devmem 0xFE00D48A 8 0x54
4. sudo busybox devmem 0xFE00D42A 8
5. sudo busybox devmem 0xFE00D42A 8 0x05
6. sudo busybox devmem 0xFE00D48A 8 0x55

And also try:

1. Set physical keyboard brightness to Low
2. sudo busybox devmem 0xFE00D42A 8 0x05
3. Close the lid
4. Wait several seconds
5. Reopen the lid
6. sudo busybox devmem 0xFE00D42A 8

Please also try:

1. Set physical keyboard brightness to Low
2. sudo busybox devmem 0xFE00D42A 8 0x00
3. sudo busybox devmem 0xFE00D42A 8 0x05
4. sudo busybox devmem 0xFE00D42A 8 0x04
5. sudo busybox devmem 0xFE00D42A 8 0x05

I also have a slightly dangerous idea:

1. Set physical keyboard brightness to Low
2. sudo busybox devmem 0xFE00D42A 8 0x00
3. sudo busybox devmem 0xFE00D42A 8 0xFF
4. sudo busybox devmem 0xFE00D42A 8 0x05

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