ATI oss color space compressed in the dark shades of gray

[Alex Deucher]

On Thu, Mar 13, 2014 at 6:34 AM, Sebastian Schultz
<sebastian2.schultz at st.ovgu.de> wrote:
> Is there anything I can do to about it? Or is this an upcoming feature? Or is
> it a bug and I should submit a report?

It would be a new feature.  It's not a high priority at the moment, so
I'm not sure how quickly we would get to it.

Alex

>
> Sebastian
>
>
> Am Mittwoch, 12. März 2014, 12:18:37 schrieb Alex Deucher:
>> On Wed, Mar 12, 2014 at 10:31 AM, Sebastian Schultz
>>
>> <sebastian2.schultz at st.ovgu.de> wrote:
>> > Hello,
>> >
>> > first of all: I'm using a Radeon 7750 in combination with a monitor via
>> > display port and a tv via the HDMI port. Most of the time I do not want a
>> > picture on the tv, only when wathcing videos, so I use xrandr scripts to
>> > switch that display on and off. And here comes my problem:
>> >
>> > With the arrival of linux 3.13 to the [core]-repo of arch linux I switched
>> > from catalyst to the open source drivers, as they finally provide a
>> > sufficient performance. My only problem now is that the colorspace is
>> > compressed for gray values below 16 (that means every shade of gray
>> > having values of 0 to 16 look just black). That's only the case for my
>> > HDMI-output connected to my TV, which worked without problems with the
>> > catalyst drivers. Also, only the dark grays are compressed, the
>> > near-white grays show up correct.  My Xorg.0.log shows that the TV on
>> > HDMI-0 supports the RGB 4:4:4 encoding (just like the monitor does):
>> > http://pastebin.com/PF6sjzu1
>> >
>> > I found a xrandr-command "--set "Broadcast RGB" "Full"", which can be used
>> > with chips from Intel. Is there something similar for the open source ati
>> > drivers?
>>
>> Not at the moment.
>>
>> Alex
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