https://bugzilla.kernel.org/show_bug.cgi?id=213297 Bug ID: 213297 Summary: ideapad-laptop: DYTC interface not found, several functionalities missing Product: Drivers Version: 2.5 Kernel Version: 5.12.8 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Platform_x86 Assignee: drivers_platform_x86@xxxxxxxxxxxxxxxxxxxx Reporter: johannes.penssel@xxxxxxxxx Regression: No Created attachment 297073 --> https://bugzilla.kernel.org/attachment.cgi?id=297073&action=edit hwinfo | grep -i driver output Device: Lenovo 5 15ITL05(i5-1135G7/GeForceMX450) Latest UEFI/ME firmware (FHCN41WW/FHME26WW) Distro: Gentoo (5.10.27 stable and 5.12.8 testing), Arch Linux (5.12.8) When inserting the ideapad-laptop module: these dmesg log messages occur: [ 2.583728] input: Ideapad extra buttons as /devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/input/input3 [ 2.583756] ideapad_acpi VPC2004:00: Keyboard backlight control not available [ 2.590680] ideapad_acpi VPC2004:00: DYTC interface is not available Result: -despite the appropriate module being loaded, /sys/firmware/acpi/platform_profile is missing completely -backlight brightness control via fn function keys doesn't work -missing drivers for LUK2019 and IDEA2004 (hwinfo | grep -i driver output is attached) -neither xev nor acpid register any inputs from the brightness keys None of the problems described above occur under Windows 10. So far, I've tried updating the UEFI/ME FW, switching to LTS kernels and different distros, as well as the standard workarounds for non-functional fn keys. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
