As per comment #19 I tried to use manual partitioning. The "Format" box in the swap partition is grayed out and disabled, but the installer always formats swap anyway, so this isn't very relevant. Either way, mkswap again succeeded and vda5 got reactivated as expected. Looks like this is some nasty timing problem somewhere.
As per comment #19 I tried to use manual partitioning. The "Format" box in the swap partition is grayed out and disabled, but the installer always formats swap anyway, so this isn't very relevant. Either way, mkswap again succeeded and vda5 got reactivated as expected. Looks like this is some nasty timing problem somewhere.