On 06/11/2012 10:51 AM, Daniel Vetter wrote:
On Sun, Jun 3, 2012 at 1:08 AM, Daniel Vetter<dan...@ffwll.ch> wrote:
On Fri, Apr 27, 2012 at 10:18:08PM +0200, Carsten Emde wrote:
Depending upon how things are set up, this might help.
Yeah, thanks a lot, works great now!
I removed patch 3/4 and 4/4 and pushed this one; so currently applied are:
[PATCH 1/4] drm/i915: clear up backlight inversion confusion on gen4
[PATCH 2/4] drm/i915: completely revert the invert brightness quirk
[PATCH] properly enable the blc controller on the right pipe
Hey, that was just a quick hack to check things ;-)
Sorry, too many things in parallel.
Spent some time reading the docs you mentioned - will continue to
work on the backlight brightness problem and prepare another patch.
I just need some more time.
Ok, I've stitched together some real patches and actually tested them.
While doing so I've noticed that the patch you've tested essentially
disables the i915 backlight control and leaves everything to the legacy or
platform backlight control.
New patches are at
http://cgit.freedesktop.org/~danvet/drm/log/?h=backlight-confusion
Note that these do not include the revert for the backlight inversion
quirk. You either have to revert that yourself for testing or disable the
backlight inversion on the kernel bootline.
Testing feedback highly welcome.
I've updated my backlight-confusion branch with new patches for gen4
(it doesn't seem to work for these machines yet). Can you please test
the updated branch?
I have added an additional test rack (#6) to our QA farm (osadl.org/QA)
and populated this rack solely with notebooks that are equipped with
Intel graphics board:
Slot #1: Lenovo T61/7661W4G, Intel GMA X3100
Slot #2: IBM T601951-A47, Intel GMA 950
Slot #4: Acer Homa/Extensa 5230E-901G16N, Intel GMA 4500MHD
Slot #5: Acer Morar/TravelMate 2410, Intel GMA 900
Slot #6: Dell Inspirion 1300/0RJ272, Intel GMA 900
Slot #7: Acer Aspire 5734Z, Intel GMA 4500M
With the exception of slot #4 that runs a 3.2-based kernel, all other
notebooks run a 3.4-based kernel. The notebook in Slot #7 is the one
with the backlight headache. Unfortunately :-; no other notebook had any
backlight problem when running a vanilla kernel, even the two new Acers
are behaving well.
In the meantime, however, I have received a report that the Acer 5732Z
has the same problem. I am sure that the reporter will be willing to
help with testing. Looks like the backlight problem is very specific to
Acer Aspire 573xZ. But I agree that a generic solution always is better
than a quirk.
I've checked out the backlight-confusion branch of your git tree and
tested it with and without the Acer quirk. I can report that the
backlight works correctly with either version. I will now contact the
owner of the Acer Aspire 5732Z and ask him to test the
backlight-confusion branch without the Acer quirk on his notebook as well.
Do you wish me to do any other test?
-Carsten.
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