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

[Dominic Fandrey]

The following reply was made to PR amd64/181357; it has been noted by GNATS.

From: Dominic Fandrey <kamikaze at bsdforen.de>
To: Matthias Petermann <matthias at petermann-it.de>
Cc: bug-followup at FreeBSD.org, current at freebsd.org
Subject: Re: amd64/181357: LCD Brightness Control not working on Lenovo X121e
 (ACPI issue?)
Date: Sat, 24 Aug 2013 20:02:28 +0200

 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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