Created an attachment (id=28029) dmesg log
Well it still doesn't help, brightness levels won't change but this time I see somewhat more output from dmesg like:
[ 82.536612] exregion-0187 [4294967280] ex_system_memory_space: System-Memory (width 8) R/W 0 Address=000000007F6E1E8A [ 82.536671] evmisc-0125 [4294967272] ev_queue_notify_reques: Dispatching Notify on [DD02] Node ffff88007f011ae0 Value 0x86 (**Device Specific**) [ 82.536695] ACPI: Failed to switch the brightness
The last two weren't appearing untill now, I think you are getting very close...
Created an attachment (id=28029)
dmesg log
Well it still doesn't help, brightness levels won't change but this time I see somewhat more output from dmesg like:
[ 82.536612] exregion-0187 [4294967280] ex_system_ memory_ space: System-Memory (width 8) R/W 0 Address= 000000007F6E1E8 A notify_ reques: Dispatching Notify on [DD02] Node ffff88007f011ae0 Value 0x86 (**Device Specific**)
[ 82.536671] evmisc-0125 [4294967272] ev_queue_
[ 82.536695] ACPI: Failed to switch the brightness
The last two weren't appearing untill now, I think you are getting very close...