> From: "Ted Unangst" <[email protected]> > Date: Wed, 09 Dec 2015 06:49:42 -0500 > > Thinkpad X1 2015 (broadwell). This is a recent regression, though I'm not sure > when it was introduced. I have lidsuspend=0. When I close the lid and open it > again, the screen comes back at 100% brightness. As in, far too bright. > > Previously, the screen would always open back up at the same brightness level > I closed it at. kettenis mentioned that the keyboard brightness keys work > (they do) but that's a recent addition. For many months, they did not. I > wonder if the changes are correlated.
They probably are. And probably the weird behaviour of the brightness keys is related as well. See my rants about ACPI being fucked because we claim to support both Windows 7 and Windows 8. My suggestion would be to comment out most of the Windows versions in the "aml_valid_osi" array and see how the behaviour changes if you only enable the "Windows 2012", "Windows 2009" or "Windows 2006" entry.
