On 21 July 2013 20:53, Linus Torvalds <torva...@linux-foundation.org> wrote: > (b) we had a late change to how ACPI backlight handling is done on > certain machines, and while this kind of thing really shouldn't be > done outside the merge window, I ended up pulling it anyway. But I'd > *really* like to have people test this thing particularly on laptops > with intel-based graphics. It should only matter (and hopefully > improve things) for the newer ones with BIOSes designed for Windows 8, > but hey, the more testing, the better. Backlight handling has beenin > painful before, so I'm mentioning this explicitly.
8c5bd7a "ACPI / video / i915: No ACPI backlight if firmware expects Windows 8" breaks backlight control for me because /sys/class/backlight/acpi_video0 disappears, and /sys/class/backlight/intel_backlight doesn't seem to have any effect. Note that acpi_video0 only worked because I was applying "[PATCH] drm/i915: quirk no PCH_PWM_ENABLE for Dell XPS13 backlight" [1], so strictly speaking mainline already didn't work. Cheers James [1] http://lkml.org/lkml/2013/7/19/748 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
