https://bugzilla.kernel.org/show_bug.cgi?id=213297 --- Comment #4 from Johannes P (johannes.penssel@xxxxxxxxx) --- (In reply to Barnabás Pőcze from comment #3) > As for /sys/firmware/acpi/platform_profile, the issue is very possible the > same as https://bugzilla.kernel.org/show_bug.cgi?id=212985 , that is, the > driver only supports DYTC 5 and above, but it seems from the DSDT that > version 4 is available on that machine. > > As for the keyboard backlight, it's not available because the driver only > supports and older version of the keyboard backlight control interface which > does not seem to be available. > > As for "LUK2019" and "IDEA2004", those devices don't seem to be that > interesting (I might be wrong though) at first glance since they seem to > contain more or less nothing as far as I can see: > > Device (HKDV) > { > Name (_HID, "LHK2019") // _HID: Hardware ID > Name (_UID, Zero) // _UID: Unique ID > Method (_STA, 0, NotSerialized) // _STA: Status > { > Return (0x0F) > } > } > > ... > > Scope (^^EC0) > { > Device (ITSD) > { > Name (_HID, "IDEA2004") // _HID: Hardware ID > Method (_STA, 0, NotSerialized) // _STA: Status > { > Return (0x0F) > } > } > } > > As for the, I assume, screen backlight and Fn keys, unfortunately I cannot > help. Thank you for your help! I thought mentioning LHK2019 and IDEA2004 might be relevant as both platforms load Lenovo-specific drivers in Windows 10, thus I assumed that they are supposed to do the same in Linux. May I ask how you were able to determine the DYTC version on my machine? I have been unsuccessfully trying to figure it out myself for the last few days. Thanks! -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
