On Monday, January 18, 2016 12:52:53 PM Andy Lutomirski wrote: > I'm running 4.4 with the pm+acpi-4.5-rc1-1 merged in. After pressing > the backlight hotkeys a couple times, things start to break. Poking > at hung thread stacks, it appears that calls to > acpi_video_handles_brightness_key_presses never return. > > It appears that the culprit is: > > commit aecbd9b1bff6afbe349921b406b99d285b412820 > Author: Adrien Schildknecht <adrien+dev@xxxxxxxxxxx> > Date: Mon Jan 4 23:22:28 2016 +0100 > > ACPI / video: driver must be registered before checking for keypresses > > Reverting that patch makes my laptop work again. > > I don't know what that patch is trying to do, but it looks highly > questionable to me. Why should an accessor wait for a potential > different driver to register something? I see no guarantee that it > will eve happen. > > This is a Dell XPS 13 9350. Should be fixed in my linux-next branch, can you please try that one? Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
