Bug#785448: xserver-xorg-video-ati: Screen is badly tinged with green when using the open source driver

[Owen Riddy]

I booted up into the install with fglrx installed, looked through the
settings and found where the screen was being set to YCbCr, and set it to
RGB. On rebooting my green tinged screen was gone.

Thanks for your help.

Owen Riddy
Email: owen.riddy at gmail.com
Mobile: 040 163 2663

--

On 20 May 2015 at 19:26, Owen Riddy <owen.riddy at gmail.com> wrote:

>
> Thanks for that. So my problem has narrowed down a bit (it still happens
> but I can fix it by changing the input colour format using the buttons on
> the side of the screen). The screen switches to use YCbCr input format:
>
> ** When the computer is booted up
> ** When I log in using kdm
> ** When the screen switches off after a period of inactivity
>
> I've used this screen for more than a year and it hasn't happened before.
> Is there any reason that the driver might set the input colour format to
> YCbCr, or is it possible for a Radeon card to set a hint for input colour
> format that could persist across a reboot?
>
>
> I'll try with the 4.1 kernel and see if anything changes.
>
> Owen Riddy
> Email: owen.riddy at gmail.com
> Mobile: 040 163 2663
>
> --
>
> On 19 May 2015 at 23:21, Alex Deucher <alexdeucher at gmail.com> wrote:
>
>> On Mon, May 18, 2015 at 4:32 AM, Owen Riddy <owen.riddy at gmail.com> wrote:
>> > No worries.
>> >
>> > It turns out that the problem was the "Color Format" of my screen. Dunno
>> > what that is, but it was configuring poorly and the open source driver
>> seems
>> > happier when it is set to RGB rather than YCbCr. Maybe Catalyst is a bit
>> > more forgiving or maybe there is some configuration issue here I don't
>> > understand.
>> >
>> > My problem is solved; there may still be a minor bug here in how the
>> > auto-configuration of the driver works.
>>
>> The open source driver does not support YCbCr at the moment.
>>
>> Alex
>>
>> >
>> > Owen Riddy
>> > Email: owen.riddy at gmail.com
>> > Mobile: 040 163 2663
>> >
>> > --
>> >
>> > On 18 May 2015 at 17:41, Michel Dänzer <michel at daenzer.net> wrote:
>> >>
>> >> On 18.05.2015 16:28, Owen Riddy wrote:
>> >> > I have not, but if I reboot the computer to an install of Jessie
>> using
>> >> > fglrx the tinge is not present; and it appeared shortly after
>> updating
>> >> > to Jessie + unstable. I'll try a few things with the cable & report
>> back
>> >> > if any of them have an impact, but the fglrx test suggests this
>> problem
>> >> > is 100% fixable in software.
>> >>
>> >> I guess I misunderstood the comments about fglrx in your original
>> >> report. I agree it's probably a software bug then, though it's more
>> >> likely in the kernel driver than in the Xorg driver.
>> >>
>> >>
>> >> --
>> >> Earthling Michel Dänzer               |
>> http://www.amd.com
>> >> Libre software enthusiast             |             Mesa and X
>> developer
>> >
>> >
>> >
>> > _______________________________________________
>> > xorg-driver-ati mailing list
>> > xorg-driver-ati at lists.x.org
>> > http://lists.x.org/mailman/listinfo/xorg-driver-ati
>> >
>>
>
>
>
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