On Tue, Dec 8, 2020 at 3:02 AM Hui Wang <hui.wang@xxxxxxxxxxxxx> wrote: > > > On 12/7/20 9:11 PM, Rafael J. Wysocki wrote: > > On Fri, Dec 4, 2020 at 8:51 AM Hui Wang <hui.wang@xxxxxxxxxxxxx> wrote: [cut] > > > > Would dropping the device ID in question from acpi_pnp_device_ids[] > > make the problem go away? > > > > If so, why don't you do just that? > > Yes, if remove "WACFXXX" from acpi_pnp_device_ids[], could fix this > issue. I planned to do so, but I found the pnp_driver in the > drivers/tty/serial/8250/8250_pnp.c still handle this ID, maybe it could > introduce regression on old machines if removing it. Well, "WACFXXX" is not a proper device ID, it is a wild card possibly matching too many devices. What device ID specifically is used in the ACPI tables for the device in question?
