amd64/181357: LCD Brightness Control not working on Lenovo X121e (ACPI issue?)

Sat Aug 24 18:02:38 UTC 2013

On 24/08/2013 17:08, Matthias Petermann wrote:
> regarding this PR I made some further observation. Even the acpi_ec_write seems to not have any effect on the brightness, the values set to the appropriate register (IBM_EC_BRIGHTNESS   0x31) survive a reboot.

My LCD brightness control stopped working when I switched to NEW_XORG
with Intel KMS (on stable/9).

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