[Intel-gfx] 3.16, i915: less colors in X?

[Chris Wilson]

On Sat, Jun 21, 2014 at 10:29:01PM +0200, Pavel Machek wrote:
> Hi!
> 
> I just test-booted 3.16-rc1, and background in X looked just wrong --
> very noticeable bands on the background gradient. I thought that maybe
> it is just my eyes, but I went back to older kernel, and background is
> ok now.
> 
> I'm trying to figure out how to ask X what color depth it is using...?
> 
> This is thinkpad x60 with Debian 6.0.9.
> 
> Any ideas?

That suggests that the panel dithering changed. Compare intel_reg_dumper
output for both kernels, especially PIPE.CONF.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre