On 06/28/2011 09:35 PM, Keng-Yu Lin wrote: > BIOS fires notifications in a constant period with VPC bit 1 set when the > power cord is unplugged. > > This event is not known yet to have any effect, but it makes the > call to sparse_keymap_report_event() and generates many KEY_UNKNOWNs. > > This causes the userspace (Gnome Power Manager in my case) unable > to enter the idle mode. As the result there is no screensaver showing up, > no dim backlight, etc. > > Signed-off-by: Keng-Yu Lin <[email protected]> > --- > drivers/platform/x86/ideapad-laptop.c | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) > > diff --git a/drivers/platform/x86/ideapad-laptop.c > b/drivers/platform/x86/ideapad-laptop.c > index bfdda33..820f013 100644 > --- a/drivers/platform/x86/ideapad-laptop.c > +++ b/drivers/platform/x86/ideapad-laptop.c > @@ -463,7 +463,8 @@ static void ideapad_acpi_notify(struct acpi_device > *adevice, u32 event) > ideapad_sync_rfk_state(adevice); > else if (vpc_bit == 4) > read_ec_data(handle, 0x12, &vpc2); > - else > + else if (vpc_bit == 1) { > + } else > ideapad_input_report(priv, vpc_bit); > } > }
So far I know this event (coming with vpc_bit=1) is for Lenovo PM utility on Windows. For most of the machine this event is not implemented in BIOS. Its ok that we just ignore the event. I think it will be better if we can let sparse-keymap or any upper level application to ignore all unknown scancode or KEY_UNKNOWN but so far I do not know a better way then this patch. -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
