Hi,
yesterday I bought a Surface Pro 4 so I could do my Unity game development on the go. I've been using Krita on my mac and I really want to use Krita Gemini on the Surfade too.
After hours installing updates, next on the list was Krita! Before I'll purchase Krita Gemini, I want to make sure I could fix some known issues;
pen pressure sensitivity, small font size,multiple screen offset,..
So I installed Krita for Windows and something else happend too; Krita puts my Surface display to sleep-mode !?! It is very strange. I leave the Surface idle and display stays on. I open Krita, and my display immediately fades to sleep-mode. When pressing the Windows-key, Krita loses focus and the screen fades back on again. But as soon Krita gets the focus again, it fades to sleep.

Googled, but did not find any related issues. Is it a Krita or a Surface issue?
Will I have the same issue using Krita Gemini?
Any ideas?

The Windows OS on my Surface Pro 4 is up-to-date. I installed latest firmware (SurfacePro4_Win10_1700501_0.msi) and Wintab drivers (Wintab_x64_1.0.0.20.zip).

Regards,
Eelco

No idea. There is absolutely no way that any code in krita can interact with the OS like that.

boudewijn wrote:No idea. There is absolutely no way that any code in krita can interact with the OS like that.

I am sure no code is directly interacting with the OS powersaving scheme. But Krita does use OS resources which cause this effect somehow. After I noticed this sleep-mode happens only when Krita is in full-screen and noticed the same effect watching game video fullscreen at Steam, I suspect it must be a graphics driver issue. I need some information to supply Microsoft support with a problem description. Maybe you can tell me what graphics library is employed by Krita; OpenGL, DirectX,.. Is fullscreen different somehow?

Regards,
Eelco.

Krita uses opengl. Afaik, Steam also uses opengl to display its library application.

boudewijn wrote:Krita uses opengl. Afaik, Steam also uses opengl to display its library application.

I figured out what happens. Apparently whenever some graphics application switch to fullscreen mode, the Surface dims down the brightness for some unknown reason. When the brightness already was set to low (like 25%), it will just become 0%,.. black.
This happens with application relying on the Intel GPU; HTML5 videos like webm in browsers, games, Krita,..
Did not thoroughly tested everything so I can't say if it's just OpenGL or DirectX also, but it definitely in NO way a Krita issue.

Spend a couple of hours with Microsoft support engineer trying to fix this. But he eventually asked me to reset the Surface, reinstall Windows and return it if that didn't fix it.
My Surface Pro 4 is plagued with display problems. The backlight is also constantly adjusting to environment light settings and it feels more like flickering. Weirdest thing when installing Windows in the dark, it will show black a screen and wakes up when I point a light to in. pfff .. go figure.

Thanks for the quick response.
Eelco.

I know that there's a setting to disable the ambient light sensor, because the SP3 had that too, and it is a terrible feature, so I disabled it.

boudewijn wrote:I know that there's a setting to disable the ambient light sensor, because the SP3 had that too, and it is a terrible feature, so I disabled it.

I know about that one too. The display will dim and brighten every couple of seconds trying to adjust according to the environment's ambient light. It does a horrible job doing so. It's experienced more like flickering. Turned it off first thing because it started to give me a headache.