[menno]

Those with the artefact problem, can you please test the following builds:

1002b: Generic - same as #0813
1002c: Generic - 1002b + PR14291
1002d: Generic - 1002c + PR14282
1002e: Generic - 1002d + PR14295

1002b should not have the artefact issue, while 1002e should have the artefact issue. I'm not expecting c & d to have it, but who knows for sure so please test them too.

Assuming the issue is confirmed as starting with 1002e then I might try and narrow it down to the specific commit with additional test builds.

Edit: We still need a debug log from an affected build which may reveal some specific GL/mesa behaviour that is hardware dependent.

I didnt have time to do all of them, bu I can confirm D does not have artifacts for me (asus chromebox 2014)    

Do you have custom configured OVERSCAN values? E.g. in kodi's gui calibration? Can you reset them please?   

 Hi Fritsch,
Woud this be considered custom settings?

Code:

    <resolutions>
        <resolution>
            <description>1920x1080@ 60.00 - Full Screen</description>
            <subtitles>1015</subtitles>
            <pixelratio>1.000000</pixelratio>
            <refreshrate>60.000000</refreshrate>
            <output>HDMI1</output>
            <xrandrid>0x48</xrandrid>
            <overscan>
                <left>21</left>
                <top>13</top>
                <right>1826</right>
                <bottom>1054</bottom>
            </overscan>
        </resolution>
        <resolution>
            <description>HDMI1: 1920x1080 @ 60.00Hz</description>
            <subtitles>1042</subtitles>
            <pixelratio>1.000000</pixelratio>
            <refreshrate>60.000000</refreshrate>
            <output>HDMI1</output>
            <xrandrid>0x48</xrandrid>
            <overscan>
                <left>0</left>
                <top>0</top>
                <right>1920</right>
                <bottom>1080</bottom>
            </overscan>
        </resolution>

I do remember back in the days you had some special settings for this chipset and hw scaling and something i believe with 20% etc, I cannot find that in the current version though anymore. This is a snippit from guisettings.xml