Date: Thu, 16 Jun 2022 21:28:45 -0700 From: Pete Wright <pete@nomadlogic.org> To: freebsd-x11@freebsd.org Subject: backlight(8) and Thinkpad special keys Message-ID: <20220617042845.vjnje56q2hixok3g@colony>
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hey there, i've noticed that on my lenovo thinkpad that when loading the drm-510-kmod driver the my usual way of managing screen brightness via hw.acpi.video.lcd.brightness does not work (the sysctl knob is not available). when loading the drm-54-kmod it is available. while debugging this i've noticed that using both drivers i am able to adjust things via the backlight(8) utility - thanks manu! the one drawback with this is that it seems like acpi_ibm(4) is no longer able to manage screen brightness. i.e. i can no longer use the special brightness function keys to increase/descrase screen brightness. so couple questions: 1. has anyone sucessfully tied their "special" keys to the backlight utility? 2. if not is the best approach to map the screen brightness keys to special events via devd that would call backlight(8) directly? my reading of the acpi_ibm man page seems to indicate it prefers to operate directly via sysctl which doesn't seem to work for me under the 5.10 drm driver. cheers, -pete -- Pete Wright pete@nomadlogic.org
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