Colin Finck replied to me:
looks like the reenabled kmtests freeze the "Test WHS" builder
from time to time. [...]
Would be great if this could be investigated as I lack the time right now.
Aug 21 16:14 ab243b82b49e... retry #1454
Retry exception slave lost, during user32 : win.
Did that one cause the slave to go offline? If so, did we know why?
Aug 31 21:09 ad0c93b001a0... failure #1462
had a similar failure as #1439 and #1456, during dinput : keyboard, so before KmTests run.