sonypi driver needs to be re-written as a acpi driver.
Created attachment 6397 [details] debug patch for hooking sonypi interrupt for hotkey driver
Oooh, super old bug report. Does it still make sense? AFAIK the hotkey driver doesn't exist anymore. And sonypi has been rewritten as an acpi driver (sony-laptop).
invalid this bug, as generic hot key function has been obsolete.