Commit 04ee9afb authored by Committed by Martin Pitt
UpKbdBacklight: Fix endless loop burning 100% CPU on keyboard plugout
If an external keyboard with a backlight gets unplugged then up_kbd_backlight_event_io would constantly get called, burning 100% CPU. To make things worse, up_kbd_backlight_event_io would also constantly post DBUS events, causing gnome-shell to also become very unresponsive. This commit fixes this by returning FALSE from up_kbd_backlight_event_io on unplug. While at it also fix calling up_kbd_backlight_emit_change with a negative brightness value in other error scenarios. Specifically this fixes calling up_kbd_backlight_emit_change with -1 on the initial up_kbd_backlight_event_io call in which case up_kbd_backlight_brightness_read will typically fail with ENODATA.