(In reply to comment #11) > Created attachment 75892 [details] [review] > Force CPU synchronisation after writes > > Another test to try.
With this patch applied on top of 2.21.3 the problem seems to be fixed.
(In reply to comment #11)
> Created attachment 75892 [details] [review]
> Force CPU synchronisation after writes
>
> Another test to try.
With this patch applied on top of 2.21.3 the problem seems to be fixed.