Date: Sat, 24 Aug 2013 17:08:25 +0200 From: Matthias Petermann <matthias@petermann-it.de> To: bug-followup@FreeBSD.org, matthias@petermann-it.de, current@freebsd.org Subject: Re: amd64/181357: LCD Brightness Control not working on Lenovo X121e (ACPI issue?) Message-ID: <5218CC69.6090108@petermann-it.de>
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Hello, 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. Looks like the values are stored correctly, but EC doesn't care for them when setting brightness? I'm not sure where to look next. Could this be a hardware issue with the Device? Kind regards, Matthias
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