Including a bunch more lists to the cc.
On Sun, Dec 2, 2012 at 12:42 PM, Daniel Vetter daniel.vetter@ffwll.ch wrote:
Ok so on v3.7-rc1 [and I suspect up] I can manually control the brightness by echoing to
/sys/class/backlight/intel_backlight/brightness
But I still can't use the buttons to control it (it only goes one tick down from max and stops there). I'm using GNOME3 from a x86_64 unstable debian install [up to date with latest].
I just noticed that under v3.7 I have a new directory /sys/class/backlight/acpi_video1 which is what GNOME is actually controlling. I can't disable ACPI video control so is there a workaround?
Tom
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On Sun, Dec 2, 2012 at 2:49 PM, Tom St Denis tstdenis@elliptictech.com wrote:
Hah, acpi registered a broken backlight driver, which overwrites the intel backlight - for once it's not i915.ko's fault ;-) For a workaround either disable the acpi backlight with acpi_backlight=vendor (iirc) kernel option or teach the X driver that you want a different backlight driver in the xorg.conf (Option "Backlight" "intel_backlight" should do the trick). -Daniel
Thanks Daniel so I'm taking back my bug report on the i915 and claiming this as a bug against the acpi_video stack.
What sort of information would the ACPI folk like from me to help diagnose this?
Here's a dmesg dump of all ACPI messages.
Tom
----- Original Message -----
dri-devel@lists.freedesktop.org
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Daniel Vetter -
Tom St Denis