Screen garbadges with Xcopy on A1000 accelerated @28mhz

[lolof70]

Hi,

I have an accelerator in my A1000 switchable from 7mhz to 28mhz.
All seems to working fine with the A1000 rgb2hdmi version, it only has an issue so far only with Xcopy …

at 28mhz, the xcopy screen as a lot of bad/wrong pixels.
At 7mhz, all is perfectly fine.

At 7mhz and 28mhz with a classic dsub rgb Amiga video cable or with a D520, all is fine.
Is there something I can do to solve this 28mhz problem with the 1000 rgb2hdmi ? (Except switch to 7mhz 😀 )

My A1000 is one of the first PAL, a model with daughterboard….

Here screenshot.

than you.