Night Color not working in guests

[Colin Xu]

How do you watch the GNOME/KDE desktop? Via dmabuf enabled vGPU in QEMU 
window, or directly vnc into the vncserver in guest?

On 2020-09-10 14:47, Thomas Prescher wrote:
> Hi,
>
> I don't know exactly what these functions are depending on, but it is
> basically the same as nightshift for Windows 10 [1] where your entire
> display image gets shifted to yellow. See an example in the link below.
>
> All the best,
> Thomas
>
> [1]
> https://support.microsoft.com/en-us/help/4027563/windows-10-set-your-display-for-night-time
>
> On 9/10/20 7:42 AM, Zhenyu Wang wrote:
>> On 2020.09.09 10:58:38 +0200, Julian Stecklina wrote:
>>> Hello everyone,
>>>
>>> we noticed that any of the Night Color modes in Gnome and KDE don't work in
>>> guests when they run with vGPUs. This is pretty easy to reproduce: Pick a GNOME
>>> or KDE Live CD and try to enable Night Color (KDE) or Night Light (GNOME).
>>>
>>> This is a bit of a minor issue, but I wonder what would be missing to make this
>>> work. Is there anything missing in Qemu or this is something that the mediator
>>> needs to handle. Does anyone have an idea?
>>>
>> I personally don't use KDE and little with GNOME. What's function those night modes
>> depend on? Display gamma config or something else?
>>
-- 
Best Regards,
Colin Xu