https://bugzilla.kernel.org/show_bug.cgi?id=218495 Bug ID: 218495 Summary: NKRO does not work on Mistel MD770 (Holtek Semiconductor, Inc. USB-HID Keyboard) Product: Drivers Version: 2.5 Hardware: All OS: Linux Status: NEW Severity: normal Priority: P3 Component: USB Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx Reporter: ishitatsuyuki@xxxxxxxxx Regression: No Created attachment 305872 --> https://bugzilla.kernel.org/attachment.cgi?id=305872&action=edit BPF program to fix the quirk My Mistel MD770 (04d9:0339 Holtek Semiconductor, Inc. USB-HID Keyboard) seems to have a descriptor quirk that prevents NKRO from working. A device descriptor, a hid capture of NKRO sequence and proposed BPF program for fix is attached. It's the exact same error as the Topre quirk [1], but the descriptor and offset is different. NKRO works on Windows without extra vendor drivers. I'm not sure if Microsoft just has a better quirk database, or they have some clever heuristics to detect this. Before copy pasting the Topre code and calling it a patch, I would like to ask about what's the best way to fix this. [1]: https://gitlab.freedesktop.org/libinput/libinput/-/issues/804 -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
