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
----- Original Message -----
From: "Daniel Vetter" daniel.vetter@ffwll.ch To: "Tom St Denis" tstdenis@elliptictech.com Cc: linux-kernel@vger.kernel.org, "intel-gfx" intel-gfx@lists.freedesktop.org, "dri-devel" dri-devel@lists.freedesktop.org Sent: Sunday, 2 December, 2012 6:43:14 AM Subject: Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
Including a bunch more lists to the cc.
On Sun, Dec 2, 2012 at 12:42 PM, Daniel Vetter daniel.vetter@ffwll.ch wrote:
On Sun, Dec 2, 2012 at 12:32 PM, Tom St Denis tstdenis@elliptictech.com wrote:
I've narrowed it down to sometime between v3.6.8 and v3.7-rc1. So none of the v3.7 series will work with this GPU/panel.
Hm, that's still a few hundred relevant commits intermingled with a few thousand that likely don't matter ;-) Can you please attempt a kernel bisect with git? For a nice howto check out http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-...
Also, can you please check which of the different backlight controls in /sys/class/backlight work on 3.6 (and whether any of them still work on 3.7)?
Thanks, Daniel
Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
-- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch