https://bugzilla.kernel.org/show_bug.cgi?id=212985 --- Comment #4 from Barnabás Pőcze (pobrn@xxxxxxxxxxxxxx) --- > If I'm understanding correctly, you're saying to check the disassembled ACPI > tables, right? Yes, exactly. >From this part: Method (DYTC, 1, Serialized) { ITSV = Zero ITSM = Zero Local0 = Zero Local1 = (Arg0 & 0x01FF) Local2 = (Arg0 & 0xFFFFFE00) Switch (Local1) { Case (Zero) { If (!Local2) { Local0 |= One Local0 |= 0x0100 Local0 |= Zero Local0 |= 0x40000000 } Else { Local0 |= Zero Local0 |= 0x04 } } it **seems to me** that only DYTC v4 is supported on that model - although I'm not sure. The ideapad_acpi driver will only expose the platform_profile functionality if it finds DYTC v5 or newer. The code was adapted from the thinkpad_acpi driver, and the platform_profile support was contributed to that driver by Lenovo employee Mark Pearson. I cannot remember the exact reason why earlier versions are not supported, you could possibly write to the PDx86 mailing list (platform-driver-x86 at vger.kernel.org) and CC him if you want to know more; or search back on lore.kernel.org. -- You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.
